scholarly journals Phenotypic correlation of traits of production and reproduction of Simmental cows in different regions of Serbia

2019 ◽  
Vol 35 (3) ◽  
pp. 219-228
Author(s):  
Vlada Pantelic ◽  
Dragan Niksic ◽  
Nevena Maksimovic ◽  
Dusica Ostojic-Andric ◽  
Marina Lazarevic ◽  
...  
Keyword(s):  
Milk Fat ◽  
Breeding Value ◽  
Phenotypic Correlation ◽  
Agricultural Producers ◽  
Phenotypic Correlations ◽  
Service Period ◽  
Milk Performance ◽  
Breeding Selection ◽  
The Republic ◽  
One Year

The main goal of this research was to examine, using modern methods, the variability of phenotypic correlations of production performances and reproductive properties of Simmental cows reared on the farms of individual agricultural producers, in different breeding areas of the Republic of Serbia. The study of phenotypic correlations of milk performance and fertility properties in different regions of Serbia was carried out on a total of 3.056 primi parous Simmental heifers under control, with lactations completed within one year. The examined animals were reared on different individual farms, and mainly in very different conditions of housing and nutrition, depending on the breeding area. The study of phenotypic correlations included the following milk performance traits: milk yield, milk fat content, milk fat yield, yield of 4% corrected milk; and fertility properties: age at first calving and service period. The results of the study among other things indicate that although the phenotypic correlations between the fertility and milk performance properties show different degrees of variation, they should be taken into account in the final assessment of the breeding value of the animal, so that the breeding selection programs are more comprehensively designes.

scholarly journals Phenotypic correlations of productive and reproductive traits of Simmental cows

2007 ◽  
Vol 23 (3-4) ◽  
pp. 11-17
Author(s):  
Vlada Pantelic ◽  
Z. Skalicki ◽  
M.M. Petrovic ◽  
S. Aleksic ◽  
B. Miscevic ◽  
...  
Keyword(s):  
Milk Fat ◽  
Reproductive Traits ◽  
Phenotypic Correlation ◽  
Cattle Breeding ◽  
Phenotypic Correlations ◽  
Service Period ◽  
Calving Season ◽  
The Republic ◽  
One Year ◽  
Fertility Traits

Research included 3.461 first calving Simmental cows in control, with lactations concluded within one year. All first calving cows were reared by private/individual farmers on the territory of the Republic of Serbia. Phenotypic correlations between following milk and fertility traits have been investigated: duration of lactation DL, milk yield MY, milk fat content MFC, milk fat yield MFY, yield of 4% FCM, age at first calving AFC and duration of service period DSP. Results of the investigation of phenotypic correlations are obtained using mixed models LSMLMW (Harvey 1990). This method enables optimal consideration of numerous effects on investigated traits (bull sires, region, calving season, and calving year). Phenotypic correlation of traits in cattle breeding relates to presence of mutual positive or negative covariance which is result of the effect of genetic and factors of the environment. Information on phenotypic correlations between milk and fertility traits can be of great importance in selection of cows, since it provides possibility to choose/select heads based on several traits at the same time. .

scholarly journals The evaluation of breeding value of simmental bulls for milk performance in Serbia

2011 ◽  
Vol 27 (2) ◽  
pp. 127-135
Author(s):  
V. Pantelic ◽  
M. Plavsic ◽  
S. Trivunovic ◽  
S. Aleksic ◽  
Lj. Sretenovic ◽  
...  
Keyword(s):  
Milk Fat ◽  
Mixed Model ◽  
Random Effect ◽  
Breeding Value ◽  
Agricultural Producers ◽  
Additive Gene ◽  
Milk Performance ◽  
The Republic ◽  
One Year ◽  
Lactation Duration

The basis for selection work is knowledge of the quality of bull sires used for conception, as well as how the major traits are passed on to the progeny. BLUP method (Best Linear Unbiased Prediction) is the basis of the most favourable solution for evaluation of additive gene value in cattle production, and it is implemented in various variants depending on the structure of data used. This research included 2.121 Simmental first cavers under control, with lactations completed within one year. All first calvers were located on holdings of individual agricultural producers on the territory of the Republic of Serbia. Evaluation of the bull breeding value for lactation duration, milk production, milk fat yield, yield of 4% FCM and percentage of milk fat, was carried out by using the mixed model (BLUP), the calculation included random effect of bull sire and fixed effect of the region, year and season of calving. In this study, bull sires which had in two or three regions over 20 daughters - first calvers of Simmental breed. Number of first calving heifers ranged from 22 to 215 animals per bull sire. By using BLUP method in evaluation of breeding value of bulls in terms of yield of milk, milk fat, content of milk fat and 4% FCMI and by ranking, results were obtained showing superiority and inferiority of breeding males.

ASSESSMENT BY ORIGIN OF BULLS OF DIFFERENT GENOTYPES ASSOCIATED WITH DISEASE RESISTANCE AND PRODUCT QUALITY

2020 ◽  
pp. 29-32
Author(s):  
Х.Х. ГИЛЬМАНОВ ◽  
С.В. ТЮЛЬКИН ◽  
Р.Р. ВАФИН ◽  
Н.С. ПРЯНИЧНИКОВА
Keyword(s):  
Milk Fat ◽  
Dairy Products ◽  
Research Work ◽  
Well Being ◽  
Breeding Value ◽  
Cattle Breeding ◽  
Holstein Breed ◽  
Milk Performance ◽  
Fat Yield ◽  
The Republic

Успешное развитие скотоводства с целью получения биологически безопасной молочной продукции высокого качества возможно лишь в условиях эпизоотического благополучия. Повышенная молочная продуктивность коров сопряжена со снижением резистентности к различным заболеваниям, включая лейкоз и мастит. Изучена оценка племенной ценности чистопородных и помесных с голштинской породой быков-производителей, принадлежащих племпредприятию Республики Татарстан, с комплексными генотипами iNOS и LTF по характеру проявления молочной продуктивности у ближайших женских предков. Установлено, что наибольшие показатели по удою и выходу молочного жира женских предков оказались у быков с комплексным генотипом BB/AA генов iNOS/LTF. Согласно результатам исследований рекомендуем в хозяйствах Республики Татарстан с часто встречаемыми случаями заболевания животных лейкозом и маститом целенаправленно использовать в селекционно-племенной работе быков-производителей, несущих в своем генотипе A и B аллели соответствующих генов iNOS и LTF. The successful development of cattle breeding in order to obtain biologically safe high-quality dairy products is possible only in conditions of epizootic well-being. The increased milk performance of cows is associated with the reduction of the resistance to various diseases, including leukemia and mastitis. In this research work we studied purebred breeding bulls and bulls crossbred with Holstein breed (both type of bulls have a complex iNOS and LTF genotypes) belonging to the plempredprime of the Republic of Tatarstan. We made an assessment of their breeding value based on the nature of milk production in the closest female ancestors. It was found that the highest indicators of milk yield and milk fat yield of female ancestors were found in bulls with a complex genotype BB / AA of the iNOS / LTF genes. According to the research results, in breeding work in farms of the Republic of Tatarstan with frequent cases of animal disease with leukemia and mastitis, we recommend purposefully using breeding bulls that carry in their genotype A and B alleles of the corresponding iNOS and LTF genes.

COMPARATIVE ANALYSIS OF THE EVALUATION RESULTS OF HOLSTEIN BLACK-MOTLEY BREEDING BULLS BY THEIR DAUGHTERS’ PRODUCTIVITY BASED ON OFFICIAL INSTRUCTIONS AND BLUP MODEL

2020 ◽  
pp. 155-163
Author(s):  
K.ZH. ZHUMANOV ◽  
◽  
T.N. KARYMSAKOV ◽  
M.A. KINEEV ◽  
M.V. TAMAROVSKIY ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Milk Fat ◽  
Cattle Breed ◽  
Breeding Value ◽  
Cattle Breeding ◽  
Lower Efficiency ◽  
Dairy Cattle Breeding ◽  
The Usa ◽  
Current Instruction ◽  
The Republic

According to the current “Instruction” used in dairy cattle selection and breeding in the Republic of Kazakhstan, bulls-producers of dairy breeds are assessed according to the their offspring quality based on the principle of “peer daughter”. This means that the phenotypic indicators of the daughters of the tested bulls are compared with the corresponding indicators of their peers. In European countries with developed dairy cattle breeding, as well as in Canada, the USA, etc., to ensure a reliable forecast of the genetic value of individuals (primarily, bulls-producers), use is made of the best linear unbiased forecast method (BLUP method). This method implies that the breeding value of producers is determined by the deviation values of the development of traits of the examined animal from its average values in the population. Especially urgent area is the research aimed at improving breeding programs, including assessing the breeding value of bulls-producers of dairy breeds using BLUP methods based on the productive qualities of the mass of dairy cattle in the Republic of Kazakhstan. The research material included the data on the phenotypic indicators of the milk productivity of first-calf cows (the amount of milk yield, the content of fat and protein in milk, the yield of milk fat and protein) of the Holstein black-motley dairy cattle breed, obtained from the information and analytical database of the Republic of Kazakhstan for 2016–2017. It was found that when evaluating according to the official “Instruction”, 16 sires out of 256 bulls (6.2%) got the stud category in 2016, 14 sires (9.2%) out of 152 bulls in 2017, and – 30 sires of 249 bulls (12.0%) over the cumulative period. The results of the conducted research prove that the use of the classic “Instructions” in dairy cattle breeding has lower efficiency (by 42.8–90.0%) as compared with the assessment of the breeding value of bulls based on the BLUP method.The selection of sire bulls into breeding groups based on the “peer daughter” methodology is not reliable enough and rather ineffective. Comparing the results of assessing the breeding qualities of sire bulls, obtianed using two methods in all compared periods (2016, 2017, 2016–2017), the authors established a clear superiority of the BLUP method over the current Instruction used in the Republic of Kazakhstan.

scholarly journals Relationship between Temperament and Stage of Lactation, Productivity and Milk Composition of Dairy Cows

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1840
Author(s):  
Ramūnas Antanaitis ◽  
Vida Juozaitienė ◽  
Vesta Jonike ◽  
Vytenis Čukauskas ◽  
Danguolė Urbšienė ◽  
...  
Keyword(s):  
Milk Fat ◽  
Genetic Correlations ◽  
Subclinical Mastitis ◽  
Milk Composition ◽  
Cow Milk ◽  
Phenotypic Correlation ◽  
Protein Ratio ◽  
Stage Of Lactation ◽  
Milk Urea ◽  
Milk Performance

The aim of this study was to assess the relationship between temperament and milk performance in cows at different stages of lactation, describing their productivity, metabolic status and resistance to mastitis. This study showed that with increasing lactation, cows’ temperament indicators decreased (p < 0.001) and they became calmer. The highest temperament score on a five-point scale was found in cows between 45 and 100 days of lactation. In the group of pregnant cows, we found more cows (p = 0.005) with a temperament score of 1–2 compared with non-pregnant cows A normal temperament was usually detected in cows with lactose levels in milk of 4.60% or more and when the somatic cell count (SCC) values in cow milk were <100,000/mL and 100,000–200,000/mL, with a milk fat-to-protein ratio of 1.2. A larger number of more sensitive and highly aggressive cows was detected at a low milk urea level. In contrast to a positive phenotypic correlation (p < 0.05), this study showed a negative genetic correlation between the temperament of cows and milk yield (p < 0.001). Positive genetic correlations between temperament scores and milk somatic cells (p < 0.001) and milk fat-to-protein ratio (p < 0.05) were found to indicate a lower genetic predisposition in cows with a calmer temperament to subclinical mastitis and ketosis. On the other hand, the heritability of temperament (h2 = 0.044–0.100) showed that only a small part of the phenotypic changes in this indicator is associated with genetic factors.

scholarly journals ESTIMATED BREEDING VALUES OF SERVICING BULLS OF THE HOLSTEIN BLACK-AND-WHITE BREED BY QUALITY OF OFFSPRING USING THE BLUP METHOD

REPORTS ◽  
2020 ◽  
Vol 5 (333) ◽  
pp. 35-41
Author(s):  
K.Zh. Zhumanov ◽  
◽  
T.N. Karymsakov ◽  
M.A. Kineev ◽  
A.D. Baimukanov ◽  
...  
Keyword(s):  
Milk Fat ◽  
Rank Correlation ◽  
Correlation Coefficients ◽  
Breeding Value ◽  
Research Information ◽  
Black And White ◽  
Livestock Breeding ◽  
White Breed ◽  
The Republic ◽  
Estimated Breeding Values

The aim of the research was to estimate the breeding value of the servicing bulls of the Holstein black-and-white breed according to the optimized equation of the mixed BLUP model. Within a comparative aspect, the estimation results of bulls calculated using the BLUP methodology are presented. As an object of the research, information was used on first-calf heifers (daughters of the evaluated bulls), who lactated in breeding herds of the Holstein cattle of the Republic of Kazakhstan in 2016-2017. The source was the official information analytical system (IAS) of livestock breeding of the Republic of Kazakhstan. The analysis of information on the dairy productivity of the cows-daughters of the estimated bulls was performed according to the indicators of the milk yield, the contents of fat and protein in milk, the milk fat and protein yield for 305 days of lactation and the study period. To compare the obtained results, the average values of breeding value indices, the reliability of their assessment, and the rank correlation coefficients were calculated

scholarly journals POLYMORPHISM OF PARAOXONASE-1 GENE (PON1) AND ITS ASSOCIATION WITH ECONOMIC TRAITS OF HOLSTEIN CATTLE

2020 ◽  
Vol 15 (3) ◽  
pp. 43-48
Author(s):  
Natal'ya Safina ◽  
Shamil' Shakirov ◽  
El'za Gaynutdinova ◽  
Ziliya Fattahova
Keyword(s):  
Milk Fat ◽  
Growth Dynamics ◽  
Paraoxonase 1 ◽  
Holstein Cattle ◽  
Economic Traits ◽  
Reproductive Ability ◽  
Pon1 Gene ◽  
Service Period ◽  
Pcr Rflp ◽  
The Republic

The purpose of the research was to study the polymorphism of the paraoxonase-1 gene with the replacement of A with G in the promoter region, as well as to evaluate the growth, milk productivity and reproductive ability of Holstein heifers with different genotypes on this gene. The work was performed in 2018–2019 in the Republic of Tatarstan on 148 first-calf cows. Genotyping was conducted by PCR-RFLP in Bsc4I locus of PON1 gene. The studied population was polymorphic, the genetic balance was not disturbed. The distribution of alleles and genotypes was as follows: A – 0.564 and G – 0.436; AA – 31.8 % (48 animals), GA – 49.3 % (75 animals), GG – 18.9 % (28 animals). Animals with GA genotype of PON1 gene were not significantly better in terms of growth dynamics (kg) in control weighing from 6 to 18 months and of daily gain (g) in 6-18 months period. The cows from the same group were statistically significantly superior to heifers with AA and GG in terms of reproductive ability: fertility index of Dohi (56.2), calving interval (395.7 days), service period (122 days), and were distinguished by the early age of the first successful insemination (17.1 months). It was found that first-calf heifers with the GG genotype were better in milk yield per 305 days of lactation (7339.6 kg), milk fat yield (291.1 kg) and milk protein yield (254.6 kg). The identified associations of PON1 gene polymorphism can be used for the selection of parental pairs for targeted breeding to improve economically useful signs of Holstein cattle

scholarly journals Investigation of the genetic correlation between milk and fertility traits of first calving cows of Simmental breed

2008 ◽  
Vol 24 (5-6) ◽  
pp. 1-8 ◽  
Author(s):  
Vlada Pantelic ◽  
M.M. Petrovic ◽  
S. Aleksic ◽  
Ljiljana Sretenovic ◽  
D. Ostojic-Andric ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Genetic Correlation ◽  
Milk Fat ◽  
Mixed Model ◽  
Genetic Correlations ◽  
Production Capacity ◽  
Agricultural Producers ◽  
Milk Traits ◽  
Service Period ◽  
Fertility Traits

Investigation of the production capacity of cattle for the purpose of increase of milk and milk fat production, as well as number of calves, greatly depends on phenotypic and genetic variability, heritability and correlation between desired traits, and on production level in the population. This research included 3.461 first calving cows of Simmental breed under control and reared on farms of individual agricultural producers on the territory of Republic of Serbia. Genetic correlations were calculated using equation of mixed model which included the effect of bull-sire, breeding region, year and season of calving: Yijklm = ? + Bi + Rj + Gk + Sl + eijklm. Coefficients of genetic correlation between service period and milk traits were following: duration of lactation 0,239, milk yield 0,089, percentage of milk fat 0,095, quantity of milk fat 0,105 and yield of 4%FCM 0,099. Correlation between service period and age at calving was 0,535. Genetic correlation between age at calving and milk traits was following: duration of lactation 0,245, production of milk 0,003, percentage of milk fat 0,531, quantity of milk fat 0,082 and production of 4%FCM 0,050.

scholarly journals The effect of interaction of systematic factors on milk performance of simmental cows in standard lactation

2012 ◽  
Vol 28 (1) ◽  
pp. 67-75
Author(s):  
M.D. Petrovic ◽  
M.M. Petrovic ◽  
Z. Skalicki ◽  
V. Bogdanovic ◽  
R. Djokovic ◽  
...  
Keyword(s):  
Milk Fat ◽  
Dairy Farm ◽  
Breeding Value ◽  
Family Farms ◽  
Performance Traits ◽  
Dairy Animals ◽  
Total Variability ◽  
Milk Performance ◽  
Calving Season ◽  
Very High

The effect of interaction between the farm and calving season, as well as the farm and group of lactations on milk performance traits (milk yield, yield of milk fat, 4% fat corrected milk and milk fat content) was analyzed on sample of 2805 Simmental cows with total 9718 standard lactations, housed on dairy farm ?Zlatiborski suvati? on Zlatibor (578 cows and 1968 lactations), dairy farm of the Agricultural holding Dobricevo in Cuprija (964 cows and 3237 lactations) and dairy animals housed on family farms/households in the region of Kotraza (1263 cows and 4513 lactations). The significance of the effect of interaction between the farm and calving season, as well as interaction between the farm and group of lactations on all milk performance traits was very high (P<0.001), which justified their inclusion into models for assessment of the breeding value of dairy cows. The share of variance of interactions in total variance of milk performance traits in standard lactations was low (below and around 4%), which clearly indicated even more systematic factors and their interactions which influence the total variability of observed traits of milk performance of cows in standard lactations.

scholarly journals Phenotype correlations of linear assessment scores of type and production traits of Simmental cows

2018 ◽  
Vol 34 (1) ◽  
pp. 59-68
Author(s):  
Vlada Pantelic ◽  
Dragan Niksic ◽  
Nevena Maksimovic ◽  
Dusica Ostojic-Andric ◽  
Marina Lazarevic ◽  
...  
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Genetic Correlations ◽  
Breeding Value ◽  
Production Traits ◽  
Linear Type ◽  
Assessment Scores ◽  
Phenotypic Correlations ◽  
Body Development ◽  
Fertility Traits

Determining the degree of correlation between two or more traits depends to a large extent on their manifestation. The knowledge of genetic and phenotypic correlations between body characteristics of the animal and product characteristics can help define the breeding goal, but also to define and harmonize the assessment criteria. Although the phenotypic and genetic correlations between the traits of body development and type and the milk yield show different degrees of variation, they should be taken into account in the final assessment of the breeding value of the animal so that the selection programs are more comprehesively defined. The examination of phenotypic correlations of linear assessment scores of the type, milk and fertility traits was performed on a total of 303 cows of the Simental breed in the first three lactations. The examination of phenotypic correlations included the following milk performance properties in the first three standard lactations: milk yield, milk fat content, milk fat yield, yield of 4% corrected milk; also fertility traits: age at current calving and service period in each lactation; while the linear type scoring included a group of traits: type or frame, muscularity, fundament, udder.

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