Effect of genetic and non-genetic factors on milk yield and milk constituents on Sahiwal cattle

Author(s):  
M. K. Verma ◽  
G. K. Sachdeva ◽  
Alok Kumar Yadav ◽  
S. Gautam ◽  
M. M. Ali ◽  
...  

The present study pertained to records on milk production and milk constituents of 259 Sahiwal cattle with 600 lactations spread over a period of 10 years from 2001 to 2010, collected from Dairy Cattle Breeding division of National Dairy Research Institute, Karnal, Haryana. To study the effect of various genetic and non-genetic factors on milk yield and milk constituents traits, mixed model least square analysis was used for analysis of data. Overall least square mean for all lactation traits of total milk yield (TMY), milk yield in 305 days or less (305MY), lactational average fat % (LFA) and lactational average solid not fat % (LSA) were 1880.39 ± 73.82 Kg, 1782.97 ± 68.37 Kg, 4.71 ± 0.01 % and 8.81 ± 0.01 % respectively. Analysis of variance showed that the differences were statistically significant for the effect of sire on TMY and 305MY; period on all the traits except TMY; parity on 305MY. However the effect of season of calving was not found significant on all the traits.

Author(s):  
M. K. Verma ◽  
G. K. Sachdeva ◽  
Alok Kumar Yadav ◽  
S. Gautam ◽  
M. M. Ali ◽  
...  

The present study was carried on milk production and milk constituents of 444 lactations of 176 Murrah buffaloes over a period of 10 years from 2001 to 2010 with the objective to find out the effect of various genetic and non-genetic factors on milk yield and milk constituents traits in Murrah buffaloes. Data on total milk yield, milk yield in 305 days or less, lactational average fat per cent and lactational average solid not fat percent (LSA) were collected and compiled purposely and analyzed with suitable statistical tool. Overall least square mean for all lactation traits of total milk yield (TMY), milk yield in 305 days or less (305MY), lactational average fat % (LFA) and lactational average solid not fat % (LSA) were 2253.88 ±70.15 Kg, 2097.11 ±59.12 Kg, 7.97 ±0.02 % and 9.64 ±0.01 % respectively. The period has significant effect on milk yield and milk constituent traits. Sire and parity affects significantly to TMY and 305MY, however, seasons were affecting to TMY only. Hence it is concluded as milk constituents (LFA and LSA) not affected by sire, parity and season. Although, sire and parity has affect on TMY and 305MY whereas season affects only TMY, therefore, due importance should be given to sire and parity during selection and genetic improvement of Murrah buffalo. Analysis among the parities also revealed that there were no significant (P<sup>3</sup>0.05) difference among the second, third and fourth parity hence, at the time of selection second lactation (305MY) milk yield is equally important as fourth lactation in which highest milk yield has been reported in present study.


Author(s):  
А.В. КОНОВАЛОВ ◽  
А.А. АЛЕКСЕЕВ ◽  
М.В. АБРАМОВА

Рассмотрена динамика производства молока в сельскохозяйственных организациях Ярославской области с 2015 по 2019 год. Проведено разделение на группы предприятий по надою молока от 1 коровы. Рассмотрены проблемы малых и средних ферм. Выявлен устойчивый рост валового надоя молока. В 2019 году он составил 292 тыс. т (+16,8% к уровню 2015 г.), что обусловлено увеличением среднегодового надоя на 1 корову до 6967 кг. Наибольший рост продуктивности отмечен в группе хозяйств с надоем от 6001 до 8000 кг (29,4%), что определено комплексным подходом к совершенствованию ведения молочного скотоводства и укреплением кормовой базы. Выявлена положительная тенденция увеличения доли вегетативных траншейных кормов I и II класса, которая в 2019 году составила 66% и возросла на 20 п.п. по сравнению с 2015 годом. Анализ породного состава молочного скота в регионе показал увеличение доли высокопродуктивных пород в племенных хозяйствах с 16,5% в 2015 году до 26,0% в 2019 году. Интенсивное использование животных приводит к ранней выбраковке коров в возрасте 3,07 отела и снижению среднего возраста стад до 2,43 отела. Дальнейший рост производства молока в регионе возможен при решении комплекса задач по оптимизации породного состава молочного скота, совершенствованию производственных систем в малых и средних сельскохозяйственных предприятиях, повышению уровня кормления и улучшению условий содержания скота. The dynamics of milk production in agricultural organizations of the Yaroslavl region in the period from 2015 to 2019 is considered, the grouping of enterprises by milk yield is carried out, the problems of small and medium-sized farms are emphasized, a steady increase of milk production was revealed, which in 2019 amounted to 292 thousand tons (+16.8% compared to 2015), which is due to an increase in the average annual milk yield per cow to 6967 kg. The greatest increase in productivity was observed in the group of farms with milk yield from 6001 to 8000 kg (+29.37%). This is determined by a comprehensive approach to improving the management of dairy cattle and strengthening the feed base. During the study period, a positive trend was revealed to increase the share of vegetative feeds of class I and II quality, which in 2019 amounted to 66% and increased by 20 p.p. compared to 2015. Analysis of the breed composition of dairy cattle in the region showed an increase in the share of highly productive breeds in breeding farms from 16.5% in 2015 to 26.0% in 2019. At the same time, intensive use of animals leads to an earlier cull of cows at the age of 3.07 calving and a decrease in the average age of herds by 6.5%, which is 2.43 calving. Further growth of milk production in the region is possible when solving a set of tasks to optimize the breed composition of dairy cattle, improve production systems, in small and medium-sized agricultural enterprises, increase the level of feeding and improve the conditions of keeping livestock.


Author(s):  
L. Gautam H.A. Waiz ◽  
R. K. Nagda

Data on 3244 Sirohi kidding during 2004 to 2016 in farmer’s flocks under All India Co-ordinated Research Project on Goat Improvement (AICRP) project, Vallabhnagar, Udaipur were utilized to estimate the average daily milk (ADM) at different lactation months and subjected to least square analysis to study the effect of various non-genetic factors like cluster, periods of kidding, season of kidding, parity, type of birth and regression of dam’s weight. The overall least-squares means for ADM1, ADM2, ADM3, ADM4, ADM5 and overall ADM were 564.07±18.34, 671.92±15.17, 633.41±10.75, 508.93±8.01, 329.72±7.93 and 540.79±10.78 ml, respectively. Cluster and period wise variation were highly significant on all stages of average daily milk yields. The parity had statistically highly significant effect on average daily milk yields, in which seemed that milk yields increase as parity increase, thereafter declined slowly. The effect of type of kidding was non-significant on all stages of average daily milk yield under this study. The regression of dam’s weight at kidding was positive and highly significant (P£ 0.01) on all average daily milk yield. The heritability estimates for these traits ranged from 0.03 ± 0.01 (ADM4) to 0.19 ± 0.02 0.06 ± 002 (ADM1). The high estimates of genetic correlations of average milk yield of different periods with overall average daily milk yield. The phenotypic correlations were positive and low between ADM1 and ADM4­, ADM5 and medium between ADM1 and ADM4, ADM5. In order to augment goat milk production, goat keepers need to be focused on nutritional and others environmental conditions as it affect their flock.


2017 ◽  
Vol 54 ◽  
pp. 6-14 ◽  
Author(s):  
M. I. Baschenko ◽  
M. V. Gladiy ◽  
Ju. F. Melnyk ◽  
M. Ja. Jefimenko ◽  
A. P. Kruhliak ◽  
...  

The state of development of dairy cattle breeding in Ukraine for the period of 2011–2016 was analyzed. The trends of livestock changes, volumes of milk production depending on regions, forms of organization, breeder's membership, breeding and breeding work, influence of genetic and paratyphoid factors on indicators of development of the industry are determined. An analysis of the location of dairy cattle, its concentration, organizational forms of milk production shows significant differences between regions, both in terms of the number of dairy herds and milk production volumes. The largest concentration of cows' livestock in agricultural enterprises is observed in the northern and central regions, in particular, Poltava, Cherkassy, Sumy, Chernihiv, Khmelnytsky oblast. Large agricultural enterprises are more cost-effective than small ones, but the last ones during 2010–2016 still prevailed in the total number of agricultural enterprises - more than 50%. The number of cows of diary and diary-meat breeds decreased almost twice (from 5431 thousand in 2000 to 2736,5 thousand in 2010), and in agricultural enterprises and farms – in four times (correspondingly from 2475 to 604.6 thousand goals). Despite the simultaneous growth of 71.6% of the average cow supply (from 2359 kg – 2000 to 4049 kg – 2009), gross milk production, after some growth until 2005, in 2009 decreased by 13.5% comparing to 2001. The same trend in the dynamics of livestock population continued in the next five years. The number of cows of Ukrainian Black-and-White diary breed as of 01.01.2016 in the control herds decreased to 68181 or 11217 heads, Ukrainian Red-and-White dairy – by 8677 and Ukrainian Red diary – by 4110 heads. At this, gross milk production increased from 2216,6 tons in 2010 to 2705,6 tons in 2016. It should be emphasized that the increase in milk production occurred only in agricultural enterprises due to the growth of productivity of cows from 3975 kg in 2010 to 5643 kg in 2016, that is almost twice. An analysis of the structure of milk production in agricultural enterprises shows the gradual increase in production volumes by large farms, which is a positive trend in terms of milk quality, economic efficiency of its production, and their development as more investment attractive. An important factor in the growth of milk production is the breeding stock of cows. Over the past 5 years, the total number of breeding cows has decreased from 153.6 thousand heads to 128.2 thousand, that is on 12 per cent. The reduction in the number of cows applies to all breeds, but most of it occurred in Red dairy breeds (16.3%). The milk yield of the cows of breeding herds of new domestic breeds grew in all breeds and made up 6613 kg of milk in Ukrainian Black-and-White diary breed with a fat content of 3.70%, protein 3.27%, Ukrainian Red-and-White dairy breeding, respectively 6357; 3.76; 3.26; Red diary – 5963; 3.87 and 3.29. An equally important problem in the development of dairy cattle breeding in Ukraine is the low level of reproduction of animals against the background of reducing the number of livestock and increasing its productivity. This is confirmed by the low yield of calves in farms of different categories. So for 2016, according to statistics, he was 70 calves per 100 cows. One of the factor that reduces the calving out is the natural biological antagonism of milk yield and reproductive capacity of the cows. Growth in milk yield of cows in breeding flocks with an increase in the heredity of the Holstein breed led to a decrease in the yield of calves per 100 cows to 68.7 heads (in 2010). The duration of productive use has the opposite tendency - in newly created domestic breeds it extends to 3–4 lactations, in Holstein – up to 1.8–2.0 lactation. The level of heifer cultivation is a major paratypic factor affecting the formation of their productive features. The intensity of breeding heifers and heifers does not fully meet the requirements of the standard domestic breeds for their live weight. From 2019, 33498 heifers in only 45.7% – 71.5% of heads, average live weight in 6 months corresponded to the breed standard, in 12 months – 61.1–82.1 and 18 months old – 63.1–73,9%. In a number of even breeding farms, the average daily gain of heifers at 6–12 months of age, during the formation of the organism, is 550–625 g. As a rule, in such farms they do not reach a high level of milk productivity. The ways and methods of reforming dairy cattle for the period up to 2025 should be formed on such bases: - in organizational terms, focusing on the expansion of milk production in large farms, which is positive in terms of the use of modern intensive technologies, the economic efficiency of its production, the attractiveness of investment; - the revival of the national selection system, which corresponds to the best examples of its organization in European countries; - domestic dairy breeds must be established as the basis of domestic dairy cattle breeding, which correspond to the conditions of their breeding and quality of products according to a set of features; - amendments to the Procedure for using the funds provided for in the state budget, directing them to implementation of the breeding program in livestock, approved by the Cabinet of Ministers of Ukraine. Execution of the proposed measures will allow to achieve the volumes of production of milk and dairy products provided by the Program.


2020 ◽  
Vol 15 (1) ◽  
pp. 99-104 ◽  
Author(s):  
Natal'ya Aleksandrova ◽  
Asiya Subaeva ◽  
Marat Nizamutdinov ◽  
Nikolay Titov

The problem of improving state support for enterprises of the dairy product complex, in particular dairy cattle breeding, remains relevant. Its solution will contribute to the preservation of livestock and increase milk production. The current system of state support for agricultural producers in Ulyanovsk region in the form of subsidies for sold milk is inefficient, and only organizations that ensure an increase in milk yield, as well as maintaining milk production and calf output per 100 cows, can receive it. In addition, the amount of subsidy per 1 liter of milk sold is only 0.54 rubles. This does not stimulate the development of dairy cattle breeding in the region, as evidenced by the low growth rate of gross milk yield for 2014–2018. The sector’s efficiency in agricultural enterprises - the main producers of marketed milk - decreased by 6.0 percentage points, amounting to 21.9% in 2018. The purpose of the study is to develop proposals for improving state support for dairy cattle breeding in the Ulyanovsk region. In general, it should be aimed at preserving (increasing) the number of dairy herds and maintaining the productivity of cows not lower than the average regional value. The amount of the proposed subsidies under the state support program for dairy cattle breeding in the region may amount to 12.0 thousand rubles. per 1 cow, including 2.0 thousand rubles for the safety of the livestock, 10.0 thousand rubles - for the productivity of cows. With this approach, in 2018, 52.5 million rubles would have been required for state support for the development of the dairy cattle industry in agricultural enterprises in the region, the subsidy per 1 liter of milk sold would have amounted to 1.66 rubles


Author(s):  
Jitendra Singh ◽  
V. K. Singh ◽  
Alok Kumar Yadav ◽  
Amit Kumar Jha

The aim of the present study was to evaluate the effect of genetic and non genetic sources of variations on lactation yield in Sahiwal cows maintained at Uttar Pradesh Livestock- cum- Agriculture Farm, Chak Ganjaria, Lucknow, U.P. Data comprising a total of 2985 records on lactation yield spanning over a period of 62 years (1949 to 2011) were analysed by least squares analysis using suitable statistical model. The overall least squares mean for total lactation yield was found to be 2069.2280.69 kg.Lactation yield was significantly influenced by sire (P<0.01), period of calving (P<0.01), season of calving (P<0.05) year and parity (P<0.05). The heritability for total milk production was estimated to be 0.105±0.035 and breeding values of sires ranged from − 121.38 to 103.69. Genetic, phenotypic and environmental trends for lactation yield were −4.46, −116.26 and −111.80, respectively.


Author(s):  
Rahman Hussein AL-Qasimi ◽  
Shatha Mohammed Abbas ◽  
Allawi L.D. AL-Khauzai

The study was carried out on 19 ewes of local Awassi sheep and 12ewes local Arabi sheep in the Al-kafeel sheep station Karbala, to determine the effect of breed and some non-genetic factors such as (sex of the lamb, type of birth, age and weight of ewes at birth) on daily and total milk production and lactation period and some of milk components (fat, protein and lactose). The results showed that a significant effect (P <0.05) of the breed on milk production traits where Awassi sheep recorded the highest mean (0.91 kg , 101.63 kg , 104.86 day) compared to the Arabi sheep she was means (0.77 kg , 88.15 kg , 99.15 day) respectively. As well as in proportions of milk components with mean( 5.1 , 4.90 , 5.51) % respectively compared to the Arabi sheep (4.70 . 4.20 . 4.89) ewes with male lambs also exceeded superior ewes with female lambs in daily and total milk production and the lactation period the sex of the lamb did not affect the proportions of milk components the weight of the ewes had a significant effect (P <0.05) in milk production attributes with superior weight of ewes on lower ewes and did not affect the proportions of milk ingredients except for lactose. The type of birth and the age of the ewes did not have a significant effect in all the studied traits except for the superiority (P<0.05) of young ewes on age ewes in the fat percentage of milk.


2020 ◽  
Vol 73 (6) ◽  
pp. 587-591
Author(s):  
Suchit Kumar ◽  
Anupama Mukherjee ◽  
Alok Kumar Yadav ◽  
Prajwalita Pathak ◽  
Saleem Yousuf

1978 ◽  
Vol 45 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Y. L. P. Le Du ◽  
R. D. Baker ◽  
J. M. Barker

SummaryTwo experiments with dairy cows and one with suckler cows and their calves were conducted to examine the use of secretion rate measurements for estimating total milk production. In the first experiment both 4- and 6- h intervals between measurements gave similar estimates of total 7-d milk yield. The second experiment compared estimated and measured milk composition as well as yield. Milk and solids-not-fat yields were underestimated with dairy cows as a result of an extended milking interval before measurement. However, fat yield was overestimated, indicating that all residual milk was not removed at the first oxytocinaided milking. It was concluded that for the beef cow, previous interval effects would be eliminated by the frequency of calf suckling, but that residual milk effects might cause a 3–6% and a 16% overestimation of milk and fat yields respectively.In the third experiment, the milk yield of suckler cows was estimated from measurements of secretion rate and from changes in calf weight; good agreement was obtained provided there were at least 3 consecutive controlled sucklings.


Author(s):  
T. Karuthadurai ◽  
A.K. Chakravarty ◽  
A. Kumaresan ◽  
D.N. Das ◽  
A. Sakthivel Selvan ◽  
...  

Background: The selection of genetically superior animals at an early stage of life, the molecular markers are used along with traditional selection. The study was carried out to identify the genetic polymorphism in the exon3 region of the Prolactin and enumerate its effect on milk production performance in Sahiwal cattle. Prolactin plays an imperative regulatory role in mammary gland development, milk emission and lactogenesis. Analysed the sequence of this gene to explore whether mutations in this sequence and it could be accountable for quantitative variations in milk production and its composition traits.Methods: Total DNA was isolated from the blood samples of 98 pedigreed Sahiwal population. Using PCR-RFLP method and direct sequencing, noticed a single-nucleotide polymorphism in exon3 region of the Prolactin gene in 156bp and also the effect of non- genetic factors on each trait was assessed by least-squares analysis for non-orthogonal data by a fixed model.Result: PCR-RFLP was done with RsaI restriction endonuclease for the identification of different genotypes. The frequency of G and A alleles of the Prolactin gene was evaluated as 0.575 and 0.425, whereas the frequencies of GG, GA and AA genotypes for the Prolactin gene were 0.45, 0.25 and 0.30, respectively. SNP (G55A) conferred an increase in test-day milk yield around 321.5g, in test day fat yield around 13.9g and in test day SNF yield increase was 19.4g, respectively. High correlation was perceived from test day (TD2) onwards between test day traits and lactation milk yield indicating that selection based on identified SNP in TD2 increased test day milk yield, fat yield and SNF yield by 1.1472 kg, 29.6gm and 45.4gm, respectively.


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