scholarly journals DYNAMICS OF DAIRY PRODUCTIVITY OF COWS OF DIFFERENT LINES

2019 ◽  
Vol 57 ◽  
pp. 136-142 ◽  
Author(s):  
S. I. Fyl ◽  
E. I. Fedorovych ◽  
P. V. Bodnar
Keyword(s):  
Milk Fat ◽  
Milk Protein ◽  
Yield Curve ◽  
Phenotypic Variability ◽  
Dairy Herd ◽  
Main Property ◽  
Milk Productivity ◽  
Black And White ◽  
The Third ◽  
Productivity Indicators

The classic method of improving breeds in cattle breeding is in-line animal breeding. This method allows to preserve the hereditary features of the ancestor and enrich the line by accumulation over several generations of valuable heredity and use the most to perfect the breed outstanding the qualities of individual animals and turn individual peculiarities of the ancestors of the lines into the group. The main property of the line is characteristic of its representatives of consolidation of individual economic utility signs due to kinship and directed breeding and selection that makes the line somewhat different from others. In view of the above, the purpose of our research was to study the milk productivity of black-and-white of different line. The research was conducted on Black-and-White cattle of Public Company "Plemzavod Styepnoy" of the Zaporizhzhya region (n = 1928). In cows of different lines, on the basis of retrospective analysis of data for the period from 2004 to 2017 (program dairy herd management "Uniform-Agri") studied dairy performance for the first, second, third and higher lactation. It was found that cows of the studied lines (Bell 1667366, Valiant 1650414, Eleweishn 1491007, Starbak 352790 and Chif 1427381) differed with each other by the duration of lactation and milk productivity indicators. Eleweishn line animals had the longest duration of the first, second, third and best lactation was noted. By this indicator, they dominated the breeds of others lines respectively at 3.2–34.8; 6.7–27.4; 5.0–38.3 and 28.6–47.8 days. Simultaneously, the highest yields for the first (8705.7 kg), the second (9722.7 kg) and the higher (9740.4 kg) lactations were characterized by the cows of the Chif line, and the lowest ones had the Eleweishn line (respectively 8146.8; 8815.5 and 9251.4 kg). Starbak line (9893.0 kg) appeared to be the best by the third lactation yields, after Chif line (29.9 kg). Bell line had the lowest level (9044.9 kg) of yields by mentioned lactations. It should be noted that the highest growth rate is 305 days from the first to the second lactation was observed in the cows of the Chiff line (by 1017.0 kg), somewhat less – at animals of the Starbak line (853.0 kg), even less – in the individuals of Valyat and Eleweishn (819.5 and 668.7 kg respectively), and the least – in Bell line cows (on 282.0 kg). The level of the yield curve between the second and third lactations was significant lower (exception Starbak line) and animals of the above lines was respectively 140.4; 851.0; 230.1; 311.3 and 156.2 kg. It was found that the smallest variability was worth the first lactation and, depending on the line of cows; the coefficients of variability were within19.4–22.8%. For the second lactation, this indicator ranged from 23.3 to 26.8, for the third – from 23.9 to 28.7 and for the best – from 21.3 to 24.7%. Pretty high the variability in the cow's yields of all studied lines indicates the need for their consolidation on this indicator. One of the important features that characterizes the quality of milk is the content of fat. This indicator in the control cows fluctuated, depending on the line and lactation, from 3.74 to 3.82%. The highest fat in milk is for the first lactation was observed in the animals of the lines Eleweishn (3.77%) and Starbak (3.77%),for the second – Starbak line (3.82%), for the third – the lines of Bell (3.79%) and for higher – the cows of Starbak lines (3.77%) and Bell (3.77%). The lowest indicators of the named feature was observed at the beginning of the Bella line (3.75%), for the second and the third lactation – in the cows of the Valiant line (3.76%), and for the best – in the animals of the Chif line (3.74%). The content of protein in the milk of animals of the studied groups is significantly between they did not differ and it, depending on the lactation and line of animals, was within the limits of 3.17–3.21%, which corresponded to the standard of Ukrainian Black-and-White and Holstein breeds. A certain level of intergroup differentiation is also noted in terms of quantity milk fat. For all the lactation under investigation, cows of the Chif line had the highest rates and the lowest ones were the Eleweishn line. Eleweishn line had the lowest amount milk protein for the first, second and best lactation, and by the third Starbak line, and the highest values for the indicated lactation are respectively in the Chif and Starbak lines. Thus, the comparative analysis of the group average on the numerical livestock of cows of different lines showed a significant level of intergroup differentiation by diet, amount of milk fat and milk protein and much less – by the amount of fat and protein in milk. The highest milk yields for first, second and higher lactation showed cows of the Chif line, for the second – the Starbak line, and the smallest – respectively, the Eleweishn and Bell lines. Strength of influence of lines onto the phenotypic variability of the yield, milk fat and milk protein for the first, second, third and best lactation was insignificant, however reliable, on the content of fat and protein in milk – even less and unreliable.

scholarly journals Milk productivity of cows-daughters from different bulls

2019 ◽  
Vol 21 (90) ◽  
pp. 68-75 ◽  
Author(s):  
S. I. Fyl ◽  
E. I. Fedorovych ◽  
P. V. Bodnar
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Phenotypic Variability ◽  
Dairy Herd ◽  
Management Program ◽  
Joint Stock Company ◽  
Stock Company ◽  
Milk Productivity ◽  
The Third

The results of researches of signs of milk productivity of the cows from different bulls for the first, second, third and higher lactations are presented. Studies were conducted on Black-and-White cattle (n = 1981) at Private Joint Stock Company “Plemzavod Styepnoy” Zaporizhia Oblast. There was studied the duration of lactation, milk yields of full and 305 days of lactation, fat and protein content in milk, quantity of milk fat and milk protein of descendants of different parents on the basis of a retrospective analysis of data for the period from 2004 to 2017 (the management program of the dairy herd “Uniform-Agri”). It was established that bulls have a significant impact on the formation of milk productivity of cows. Daughters of E. Naitinhel 683403608 had the longest duration of the first, second and higher lactation and descendants of N. Ardent 137922325 of the third one. Daughters of the bull G. Dzhungl 7816598 were the best by the milk yield of the full first and higher lactation, daughters E. Naitinhel 683403608 for the full second, and daughters of N. Ardent 137922325 – for the third. For 305 days of lactating there was observed a significant level of intergroup differentiation for the number of milk yield, milk fat and milk protein and much less by the amount of fat and protein in milk. For the first 305 days of lactation daughters of bull L.H.F. Bay 66821678 (10188.0 ± 377.12 kg) were characterized by the highest milk yield, and daughters of F. Gailuron 103356429 (correspondingly 11028.8 ± 30619; 11643.3 ± 590.20 and 10311.7 ± 382.07 kg) for the second, third and the highest lactation, with both bulls belonging to the line R.O.R.E. Eleveyshn 1491007. For 305 days of the first lactation descendants of the bulls V. Silas 7419933 (7003.5 ± 317.79 kg) from the line H.H. Starbak 352790 had the lowest milk yield, daughters of E. Naitinhel 683403608 (7633.0 ± 182.18; 7605.8 ± 224.58 and 8491.7 ± 185.42 kg respectively) from the line R.O.R.E. Eleveyshn 1491007 by the second, third and highest lactation. Detected by comparison of group average conditionality of phenotypic variability quantitative characteristics of the milk productivity of cows derived from different parents was confirmed by the dispersion analysis conducted by us. The most significant influence of bulls were made on the milk yields of daughters for the first-third lactation (12.9–16.8%), lower – for the amount of milk fat (12.4–15.6%) and milk protein (12.2–15.8%) and even lower – for the content of fat (2.5–4.2%) and protein in milk (3.7–6.6%). It should be noted that the effect of the bulls on signs of milk productivity for the lactation under study in their daughters in almost all cases was reliable (P & lt; 0.05–0.001) except for the fat content in milk for the first lactation and fat and protein – for the second and third lactation.

MILK PRODUCTIVITY OF BLACK-AND-WHITE CATTLE WITH DIFFERENT GENOTYPES OF PROLACTIN AND SOMATOTROPIN

2021 ◽  
pp. 21-25
Author(s):  
Л.Р. ЗАГИДУЛЛИН ◽  
Р.Р. ШАЙДУЛЛИН ◽  
Т.М. АХМЕТОВ ◽  
С.В. ТЮЛЬКИН ◽  
А.Б. МОСКВИЧЕВА
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Milk Productivity ◽  
Black And White ◽  
Gh Gene ◽  
White Cattle ◽  
Fat Yield ◽  
Prl Gene

Изучена взаимосвязь аллельных вариантов генов пролактина и соматотропина с показателями молочной продуктивности коров черно-пестрой породы по 1 и 3 лактации. У первотелок, как и у полновозрастных животных,  наиболее высокий удой (4642 и 6240 кг), количество молочного жира (174,1 и 215,0 кг) и молочного белка (149,0 и 182,5 кг) достигнуты в группе с генотипом PRL АА. По массовой доле жира и белка в молоке коровы с генотипом PRL ВВ достоверно превосходили животных с генотипом PRL АА на 0,12% (Р<0,05) и 0,05% (Р<0,05) соответственно. По гену соматотропина наибольший уровень молочной продуктивности выявлен у коров с генотипом GH LL при достоверном преимуществе над GH VV у первотелок по удою на 439 кг (Р<0,01), выходу молочного жира — на 13,6 кг (Р<0,001), выходу молочного белка — на 15,3 кг (Р<0,01). У полновозрастных коров превышение над остальными группами было только по удою — на 219—548 кг (Р<0,05). Наибольшая жирномолочность характерна животным с генотипом GH VV по 1 лактации — 3,83% и по 3 лактации — 3,82%, а лучшая белковомолочность — коровам, имеющим аллель V гена GH:  3,21 и 3,23% соответственно. Полученные данные свидетельствуют о более высоком уровне молочной продуктивности у коров с генотипом PRL АА и GH LL, но лучшая жирномолочность и белковомолочность отмечены у особей, имеющих в своем генотипе аллели В гена PRL и V гена GH. The interrelation of allelic variants of prolactin and somatotropin genes with indicators of milk productivity of black-and-white cows for the 1st and 3rd lactation was studied. The highest milk yield (4642 and 6240 kg) amount of milk fat (174.1 and 215.0 kg) and milk protein (149.0 and 182.5 kg) were in the group with the PRL AA genotype in first-calf heifers as well as in full-age animals. In terms of the mass fraction of fat and protein of milk, the cows with the PRL BB genotype significantly exceeded animals with the PRL AA genotype by 0.12% (P<0.05) and 0.05% (P<0.05), respectively. According to the somatotropin gene, the highest level of milk productivity was revealed in cows with the GH LL genotype with a significant advantage over GH VV in first-calf heifers in milk yield by 439 kg (P<0.01), milk fat yield by 13.6 kg (P<0.001), milk protein yield by 15.3 kg (P<0.01). The excess over the other groups in full-age cows was only in terms of milk yield that was by 219-548 kg (P<0.05). The highest protein content of milk is a characteristic of animals with the GH VV genotype, 3.83% is for the 1st lactation and 3.82% is for the 3rd lactation, and the best protein content of milk in cows with V allele of the GH gene is 3.21 and 3.23%, respectively. The obtained data  indicated a higher level of milk productivity in cows with the PRL AA and GH LL genotypes but the best fat and milk content was noted in cows with alleles B of the PRL gene and V of the GH gene in their genotype.

scholarly journals ESTIMATION OF HOLSTEIN BREED BULLS BY DAIRY PRODUCTIVITY OF THEIR DAUGHTERS

2020 ◽  
Vol 59 ◽  
pp. 26-34
Author(s):  
S. L. Voitenko ◽  
O. V. Sydorenko
Keyword(s):  
Milk Yield ◽  
Phenotypic Variability ◽  
Milk Productivity ◽  
Paternal Origin ◽  
Black And White ◽  
Holstein Breed ◽  
The Third ◽  
Holstein Bulls ◽  
The Difference ◽  
Dairy Breed

The scientific community has shown that the genetic improvement of dairy cattle depends on many genotypic factors, including paternal ancestry and lineage. With this in mind, the purpose of our research was to evaluate the Holstein bulls of black-and-white and red-and-white suits of different lines for the milk productivity of their daughters. The research was carried out on the basis of primary breeding records of 10 breeding herds of Ukrainian Black-and-White Dairy breed, 3 – Ukrainian Red-and-White Dairy breed and one – Ukrainian Red Dairy breed, which are subordinated to NAAS. Cows of the studied breeds has divided into groups according to lineage and paternal origin. Studies have revealed a significant differentiation of milk yield of cows of the first and highest lactation not only of one breed, but also of linear affiliation and paternal origin. It was found that the yield of the first lactation in cows of the Ukrainian Black-and-White Dairy breed varied from 3211 kg (Damir 7100354042) to 7884 kg (Dzhokus 113080315) of milk. Noteworthy are the daughters of Dzhokus 113080315, from which 9143 kg of milk were obtained for higher lactation, Polyarsten 342347941 and Manteno 344222859 – 8248 kg and 8290 kg of milk, respectively. The significant influence of paternal origin on the yield of Ukrainian Black-and-White Dairy breed cows of the first and higher lactation (31.0%; P > 0.999) and 37.3% has been proved; P > 0.999). The influence of genealogical formation on the milk productivity of cows was significant and amounted to 10.8% for the first lactation, higher – 10.2%. Some of the first-born Ukrainian Black-and-White Dairy breed has characterized by high milk productivity, which steadily increased until the third and higher lactation. The yield of cows of the Ukrainian Red-and-White Dairy breed of the first lactation varied from 5414 kg (Dialog 2009) to 6689 kg (Larets 6177), testifying to better homogeneity of herds in terms of milk productivity compared to the Ukrainian Black-and-White dairy breed. The highest yield of the third and highest lactation – 7626 kg, had cows-daughters of the bull Roman 660886883 Starbuck line 352790. The variability of milking cows of Ukrainian Red-and-White Dairy breed of the first and highest lactation by 25.0% and 15.2%, respectively, was due to the influence of the father offspring and to a lesser extent – belonging to the line. A very high (6517–8013 kg) realization potential of milking cows of the Ukrainian Red Dairy breed was established, but it also depended on the paternal origin and linear affiliation. The highest yield of the first lactation were shown by the daughters of the bull Belisar 365235897, Dzhorin 114414759 and Tumpi 112367468, who produced 8013 kg, 7323 kg and 7170 kg of milk, respectively. In cows of this breed it was found that yield increased with increasing serial number of lactation, with the third and higher lactation cows produced more than 8000 kg of milk per lactation, and the daughters of bull Dzhorin 114414759 – more than 9000 kg. The influence of the bull on the milk productivity of the first-born cows of the Ukrainian Red Dairy breed (16.7%; P > 0.999) is almost three times higher than this linear affiliation. Significant phenotypic variability of milk productivity of cows of different breeds of half-sisters by the father is established. The advantage of the daughters of the bull Belisar 365235897 of the Ukrainian Red Dairy breed on milking of the first lactation over the representatives of the Ukrainian Red-and-White Dairy breed was 1932 kg (p < 0.001). The difference in milk yield of the first lactation of the half-sisters by the father, the bull Konbeo 579810507 was 1007 kg (p < 0.01), and Roman 660886883 – 717 kg. Thus, a significant phenotypic variability of milk productivity of cows of different breeds of half-sisters by father was established. At the same time, regardless of the breeder, the cows of the Ukrainian Red Dairy breed were characterized by higher milk yield of the first lactation in comparison with the Ukrainian Red-and-White Dairy breed.

scholarly journals Study of daily dynamics of cow milk quality indicators

2021 ◽  
Vol 37 ◽  
pp. 00091
Author(s):  
Vladimir Trukhachev ◽  
Serhii Oliinyk ◽  
Nikolay Zlydnev ◽  
Alexey Pokotilo ◽  
Alexander Ershov
Keyword(s):  
Milk Fat ◽  
National Level ◽  
Dairy Herd ◽  
International Committee ◽  
Cow Milk ◽  
Milk Productivity ◽  
Black And White ◽  
Technological Advances ◽  
Methodological Principles ◽  
Daily Milk

The introduction of modern technological advances and principles of dairy herd management, which were developed in the member countries of the International Committee for Animal Registration (ICAR), contributed to the increase in milk productivity of pedigree cattle at the national level. The harmonization of national regulatory documents with the methodological principles developed in ICAR is a promising area. The study of new methodological approaches to the assessment of milk productivity shows that one of the differences in the assessment of daily milk yield, milk fat and protein yield is the different frequency of performing the corresponding work on the control milking of cows, the formation of a daily milk sample and the necessary mathematical calculations. In the in article various approaches to assessing the daily yield of the main dairy components during 2- and 3-fold milking of cows of a herd of pedigree black-and-white cattle are considered and coefficients are proposed for recalculating the daily content of fat and protein in milk. At the same time, the presented research results, in general, coincide with the main trends in the dynamics of milk fat and protein indicators shown in the ICAR recommendations.

INFLUENCE OF ORIGIN ON MILK PRODUCTIVITY AND REPRODUCTIVE PROPERTIES OF SYCHEVSKAYA BREED COWS

2020 ◽  
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Mass Fraction ◽  
Milk Protein ◽  
Live Weight ◽  
Reproductive Function ◽  
Milk Productivity ◽  
Holstein Bull ◽  
Productivity Indicators ◽  
Weight Coefficients

The results of researches on studying of sires influence on milk production and reproductive properties of Sychevskaya breed cows, bred in the breeding farm, JSC "Vostok", Smolensk region. In order to determine sires, cows, which are able to increase milk productivity of the herd without compromising reproductive properties, population of full-aged cows, according to their origin, was divided into six groups. Their milk yield was analyzed for first and third lactations, mass fraction of milk fat and milk protein, live weight, coefficients of milk yield of cows and the sustainability of lactation. The most stable, in all groups, is the first lactation, then there is a decrease to the fifth lactation. Cows received from the bull of Sychevskaya breed Pyl 6782, for the first lactation have a productive advantage over livestock received from other bulls. In full-aged animals derived from this bull, this advantage is lost. The daughters Hanke 6749, Holstein red-and-motley breed, have intensively promoting milk productivity, indicators of milk fat and protein is higher in daughters of Holstein bull Marder 6721. Reproductive properties were studied: open days and calving interval, age at first calving, days to first fertilization in lactation. The best reproductive properties have Sychev bulls. After calving, reproductive function in daughters Naliv 6791(sychevskaya breed) were restored earlier, in daughters Hanke 6749 - for longer period. The correlation of signs is defined: milk yield between lactations, milk productivity with mass fraction offat%, live weight, age of the first calving, the period of days before the first insemination in lactation.

scholarly journals Milk productivity of black-and-white and Kholmogory cows with different genotypes of kappa-casein

2021 ◽  
Vol 37 ◽  
pp. 00167
Author(s):  
Radik Shaidullin ◽  
Lenar Zagidullin ◽  
Anastasia Moskvicheva ◽  
Rifat Khisamov ◽  
Tahir Akhmetov
Keyword(s):  
Milk Fat ◽  
Mass Fraction ◽  
Milk Protein ◽  
Significant Excess ◽  
Milk Productivity ◽  
Dna Diagnostics ◽  
Black And White ◽  
White Breed ◽  
Fat Yield ◽  
The Difference

The influence of genotypes for kappa-casein gene on the main indicators of milk productivity in the 1st and 3rd lactation in black-and-white and Kholmogory cows was studied. The genotyping of cows for the CSN3 gene was carried out by the method of DNA diagnostics. Cows of the black-and-white breed with genotype CSN3 BB surpass the group with genotype CSN3 AA and CSN3 AB in the 1st lactation in milk yield by 166-218 and in milk fat yield by 4.9-8.7 kg; for the 3rd lactation 188-298 kg and 7.7-10.2 kg, respectively. At the same time the difference is significant in terms of the mass fraction of protein in milk by 0.06-0.15% (Р<0.05-0.001) and 0.11-0.15% (Р<0.001) and in the yield of milk protein (Р<0.05) 8.3-14.2 kg and 14.8-16.1 kg (P<0.05). Kholmogory cows have a similar advantage for cattle with genotypes CSN3 AA and CSN3 AB in terms of milk productivity with a significant excess in the mass fraction of protein in milk for the 1st lactation by 0.07-0.14% (Р<0.05-0.001), for the 3rd lactation by 0.08-0.11% (Р<0.05-0.001). Consequently, the black-and-white and Kholmogory breeds have approximately the same level of superiority of cows homozygous for B allele CSN3 over their herdmates.

scholarly journals DAIRY PRODUCTIVITY OF UKRAINIAN BLACK-AND-WHITE DAIRY BREED COWS DEPENDING ON THE GENOTYPE

2020 ◽  
Vol 60 ◽  
pp. 71-77
Author(s):  
O. V. Sydorenko
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Productivity ◽  
Group V ◽  
Black And White ◽  
Holstein Breed ◽  
The Third ◽  
Group I ◽  
Group Ii ◽  
Dairy Breed

The research was carried out according to the materials of pedigree records of 10 breeding farms for breeding Ukrainian Black-and-White Dairy cattle. Following the requirements of the Instruction on grading cattle of dairy and dairy-meat breeds, regarding the distribution of local animals by generations on the basis of the conditional share of blood by breeding breed, cows in these herds were divided into 5 groups with the corresponding conditional share of blood by Holstein breed: group I – 50.0–74.9%; ІІ – 75.0–87.4%; III – 87.5–93.7%; IV – 93.8–96.8%; V – 96.9% or more. It was found that in breeding herds among 1940 first-born cows the number of crossbreed animals of the I–III generation was 905 heads (46.6%), and the IV generation and older – 1035 heads (53.4%). During the first lactation, cows of the I group exceeded their peers of the II group by 386 kg (p < 0.05), III – by 159 kg, IV – by 332 kg, but were 114 kg inferior to individuals of the V group. The highest yield of cows for the first lactation – 5996 kg of milk, obtained in group V. The largest amount of milk fat was obtained from cows of group I – 225.5 kg, which is 3.2–20.2 kg (p < 0.01), more than peers of other studied groups. During the second lactation, the hopes of cows of groups II–IV did not increase in comparison with group I with the increase in their genotype of conditional blood by Holstein breed. Cows of the I group exceeded the expectations of the representatives of the II group by 277 kg, III – by 125 kg and IV – by 264 kg, but were 237 kg inferior to animals of the V group. The amount of milk fat during the second lactation did not depend on the conditional blood by the improving breed and was the highest in individuals of group I – 244.2 kg, respectively. During the third lactation, the largest amount of milk was obtained from cows of group V – 6654 kg. In turn, this lactation is also characterized by a decrease in milk yield in cows of groups II–IV compared to the first and V groups. It was determined that cows of group I produced 277 kg more milk than representatives of group II and 260 and 415 kg – III and IV groups, respectively. The obtained amount of milk fat did not correlate with the conditional blood of cows by the breeding breed. During the IV lactation, cows of the experimental groups produced from 5880 to 6879 kg of milk while maintaining the trend of uneven milk yield depending on the influence of conditional blood in their genotype of Holstein breed. It was found that cows of group I for 305 days of the fourth lactation produced 6173 kg of milk and outnumbered only representatives of group II (293 kg), but inferior to individuals of group III by 23 kg, IV – by 297 kg and V – by 706 kg. Group V cows were also characterized by the highest amount of milk fat in milk. It is established that only from V lactation a clear dependence of yield cows on conditional blood for the improving breed. Thus, cows of group I produced 301–1613 kg (p < 0.01) less milk per lactation than individuals of other groups, whose conditional blood content by Holstein breed was higher. A similar trend is set for the amount of milk fat. Dairy productivity of VI lactating cows, similarly to V, has a clear tendency to increase with increasing conditional blood of Holstein breed in their genotype. Cows of group I in terms of milk yield were inferior to representatives of group II by 1052 kg, III – by 1179 kg, IV – by 1395 and V – by 2257 kg (p < 0.05). The amount of milk fat was consistent with the amount of milk obtained. It was found that in local cows with a conditional share of blood for the improving breed at the level of 50.0–74.9% of hopes increased from I to III lactation. In cows with a conditional share of blood by Holstein breed in the range of 75.0–87.4% of hopes increased from I to III lactation, with a further decrease in productivity from IV to VI lactation. The amount of milk fat correlated with the milk yield per lactation in cows, a statistically significant difference was found only between the first and second lactations. Crossbreed cows of the III genotypic group, conditional blood according to Holsteins in which 87.5–93.7%, showed the highest milk productivity during the third lactation – 6286 kg. The largest amount of milk fat was obtained in the milk of animals of the third lactation – 239.4 kg. High-blooded cows of the IV genotype group differed significantly in milk productivity from the representatives of other groups. In cows of this group, milk yield increased from I to V lactation and decreased during VI lactation. The amount of milk fat depended on milk yield and increased in proportion to the amount of milk obtained during lactation. It is determined that the content of the most high-blooded Holstein cows of the Ukrainian Black-and-White dairy breed, the conditional share of blood which is 96.9% and above is the most economically advantageous for milk production, as they increase milk productivity from I to V lactation.

COMPARATIVE DESCRIPTION OF MILK PRODUCTIVITY OF COWS UKRAINIAN RED-AND-WHITE DAIRY CATTLE AND UKRAINIAN BLACK-AND-WHITE DAIRY CATTLE AND HOLSTEIN BREEDS IN SERF «OLEKSANDRIVSKE»

2016 ◽  
Vol 52 ◽  
pp. 6-12 ◽  
Author(s):  
M. V. Gladiy ◽  
G. S. Kovalenko ◽  
S. V. Priyma ◽  
G. A. Holyosa ◽  
A. V. Tuchyk ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Yield ◽  
Fat Content ◽  
Holstein Cows ◽  
Milk Productivity ◽  
Black And White ◽  
The Third ◽  
Fat Yield ◽  
Selection Of

The main goal of dairy breeds selection should be improving breeding and productive qualities of animals under modern conditions. The majority of farms, using native breeds to produce milk, has created optimal conditions for keeping and feeding, selection and matching, growing of replacements etc. Further improvement of created native dairy breeds for economically useful traits occurs at total use of purebred Holstein bulls (semen) of foreign selection. In order to realistically assess milk productivity (milk yield, fat content in milk and fat yield) of Ukrainian Black-and-White and Red-and-White Dairy cows should be conducted a comparative analysis of Holstein cows under the same conditions of feeding and keeping. It was established that Ukrainian Red-and-White Dairy cows were characterized by the highest milk yields for 305 days of all lactations, taken into account, the among three investigated breeds. Their milk yield during the first lactation was 5933 kg of milk, during the second – 6393 kg, the third – 6391 kg and during higher lactation – 6650 kg. Ukrainian Black-and-White Dairy cows were second by milk yield (except for the second lactation), during the first lactation – 5932 kg of milk, the third – 6462 kg and higher – 6541 kg, and Holstein cows were third, during the first lactation – 5794 kg of milk, the second – 6381 kg, the third – 6335 kg and higher – 6469 kg. The fat content was almost the same and varied within 3.49-3.58% in milk of Ukrainian Red-and-White Dairy cattle, 3.50-3.60% in milk of Ukrainian Black-and-White Dairy cattle and 3.50-3.56% in Holsteins’ milk. The difference between the breeds was within 0.01-0.04%. All the investigated breeds had predominance in fat yield for three lactations over standards of these breeds: Ukrainian Red-and-White Dairy cows from 75.1 to 93.4 kg, Ukrainian Black-and-White Dairy cows – 75.1-89.0 kg respectively and Holstein cows – 41.9-60.2 kg. It was found different level of positive correlation between milk yield and fat yield in all the cases and high correlation (r = 0.604-0.921, P < 0.001) in five cases (41.7%) Negative correlation coefficients indicate that selection of animals to higher milk yield in the herd will decrease the second trait – fat content in milk. Positive and highly significant correlation between milk yield and fat yield indicates that selection of cows in the herd to higher milk yields will increase fat yield. It was revealed that bulls were among the factors impacted the milk productivity (milk yield, fat content, fat yield) of three investigated breeds. So, the force (η²x) of father’s impact on milk yield was15.4-47.9%, fat content – 22.0-43.4% and fat yield – 14.9-47.7% taking into account a lactation and a breed. The force of lines impact (η²x) was second; it was on milk yield 6.1-24.5%, fat content – 4.1-17.1 and fat yield – 5.8-23.5%. The force of breeds impact (η²x) was last; it was on milk yield 0.3-2.9%, fat content – 0.2-0.3% and fat yield – 0.6-2.7%. So, the comparative studies of milk productivity of Ukrainian Red-and-White and Black-and-White Dairy cattle with Holsteins indicate that under similar conditions of feeding and keeping, these native breeds can compete with Holstein cattle. The milk yield for 305 days of higher lactation was 6650 kg of milk in Ukrainian Red-and-White Dairy cows, 6541 kg in Ukrainian Black-and-White Dairy cows and 6469 kg in Holsteins. It was found the inverse correlation r = -0.025-0.316 between milk yield and fat content in milk in most cases. Selection and matching of animals in the herd should be carried out simultaneously on these traits. It was found positive repeatability of milk yields between the first and second, the third and higher lactations (rs = 0.036-0.741), indicating the reliability of forecasting increase in milk productivity during the next lactations in all herd. Bulls have the greatest impact (η²x) on milk productivity among the factors taken into account: milk yield – 15.4-47.9%, fat content in milk – 22.0-43.4% and fat yield – 14.9-47.7%.

The effectiveness of use RUSMA additive in the rations of lactating cows

2020 ◽  
pp. 28-37
Author(s):  
S. Sukhanova ◽  
N. Pozdnyakova ◽  
F. Yaroslavtsev
Keyword(s):  
Milk Fat ◽  
Raw Materials ◽  
Fat Content ◽  
Feed Additives ◽  
Control Group ◽  
New Mineral ◽  
Milk Productivity ◽  
Black And White ◽  
Lactating Cows ◽  
Experimental Group

The results of researches on the development of new mineral feed additives based on raw materials produced by Uralchem and the study of the eff ectiveness of their use in the rations of lactating cows have been presented in the article. The experiment has been carried out in the conditions of LLC “PF Barabinskoe” in the Dalmatovsky area in the Kurgan region where 3 groups of lactating cows of Black-and-White breed have been formed. Animals in the control group have been received the ration adopted in the farm, the 1st experimental group with the additive RusMA No. 1 at a dose of 150 g, the 2nd experimental group– with the additive RusMA No. 2 at the dose of 350 g. The use of experimental mineral additives in feeding lactating cows allowed us to increase their milk productivity and profi tability of production. At the same time, the best eff ectiveness was shown by the additive RusMA No. 2 at the dose of 350 g/head/day. The use of RusMA additives during the experiment period (105 days) allowed to increase the milk productivity of cows in the 1st experimental group by 6,03 % and in the 2nd experimental group by 8,24 %. Taking into account the fat content in milk, this diff erence was 6,31 and 8,53 %, respectively. The energy value of milk from cows of the experimental groups was higher compared to the control group by 2,45 and 1,76 %, respectively. According to the content of dry matter in milk, cows of the 2nd experimental group exceeded the control and 1st experimental group by 0,39 and 0,12 abs.%, respectively. The maximum milk fat content has been observed in the milk of cows of the 1st experimental group by 0,03 and 0,01 abs.% more than in the control and 2nd experimental groups, respectively. In terms of protein content, the cows of the 2nd experimental group signifi cantly exceeded the control group by 0,10 abs.% and the 1st experimental by 0,04 abs.%. The content of milk sugar in the 2nd experimental group was higher than in the control by 0,30 abs.% and compared to the 1st experimental by 0,11 %. Signifi cantly more calcium and phosphorus were contained in the milk of cows of the 2nd experimental group by 4,58 % (Р ≤ 0,001) and 2,86 % (Р ≤ 0,05), compared with the control group. The expenditures of feed in the EFU for the production of 1 kg of milk in animals of the 2nd experimental group was less by 5,13 % than in control cows and by 2,63 % compared to the 1st experimental group. The prime cost of 1 centner of milk was lower in the 2nd experimental group by 3,94 %, in the 1st experimental group by 2,65 % compared to the control group. The level of profi tability of milk production in the 2nd experimental group was higher by 9,0 and 1,0 abs.% in comparison with the control and 1st experimental groups, respectively.

Milk protein polymorphism in Danish dairy cattle and the influence of genetic variants on milk yield

1990 ◽  
Vol 57 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Anne-Marie Bech ◽  
K. Rotvig Kristiansen
Keyword(s):  
Dairy Cattle ◽  
Milk Fat ◽  
Milk Protein ◽  
Gene Frequencies ◽  
Black And White ◽  
Milk Samples ◽  
Yield Parameters ◽  
Jersey Cows ◽  
Β Lactoglobulin ◽  
Danish Dairy

SummaryIn milk samples from 549 cows of the breeds Danish Jersey, Red Danish Dairy Cattle (RDM), and Black and White Danish Dairy Cattle (SDM) the genetic polymorphisms of the αs1, β and K-cascin and β-lactoglobulin (β-Lg) loci were determined by isoelectric focusing in agarose gels. The results of the screening were comparcd with results obtained by Larsen & Thymann (1966). In addition, the genetic linkage of the three casein loci was studied, and the association between milk protein genotypes and yields in first and second lactations of milk, fat and protein were investigated.The distribution of genotypes of all four milk protein Systems was different from breed to breed.For Jersey cows, significant differences in the gene frequencies from the results of the 1966 investigation were found for αs1 and K-casein and β-Lg. For SDM cows a change in the K-casein frequency had occurred whereas for RDM cows no changes were found.Linkage between some of the casein loci was found within ail three breeds. For the RDM breed the possible linkage between αs1-casein and the other caseins could not be tested bccause nearly ail thc cows were homozygous for the αs1-cascin-B genotypes.β-Casein genotypes were associated with yield parameters in ail breeds. The A2A2 genotype of this protein gave higher yields of milk, fat, and protein in the second lactation than thc A1A1 genotype.

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