Components of Variance Associated with Service Sire for Milk Yield and Reproductive Traits

Johnson, L.P.; Vleck, L.D. Van

doi:10.3168/jds.s0022-0302(79)83319-6

Cited by 14 publications

(4 citation statements)

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“…The lack of a (large) contribution of the sire of the calf to the variability in the 4 milk production traits suggests minimal effect. The contribution of calf sire to the total phenotypic variance in lactation yield among Holstein (Johnson and Van Vleck, 1979) and Jersey (Moya et al, 1989) cows has previously been reported to vary from 0.4 to 3.8%.…”

Section: Short Communicationmentioning

confidence: 99%

Short communication: The beef merit of the sire mated to a dairy female affects her subsequent performance

Berry

Ring

2020

Journal of Dairy Science

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Much of the research to date on dairy × beef matings has focused only on the greater revenue attainable from these beef-cross calves. The objective of the present study was to quantify the mean effect on cow performance following the birth of calves differing in beef merit; all calves were born without calving assistance. Beef merit in the present study was based on the breed of the sire but also its genetic merit for carcass weight and conformation. The cross-sectional study used up to 346,765 calving events from 230,255 Holstein-Friesian cows in 3,604 herds. Performance traits of interest were those associated with milk production, including somatic cell count, as well as female reproductive performance. Sire breed was associated with all yield traits, somatic cell count, and both pregnancy rate and the interval from calving to first service; no association existed with either submission rate or number of services. Relative to a Holstein-Friesian sire, the mean 305-d milk yield (in kg) was 45.22 (standard error,

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Section: Short Communicationmentioning

confidence: 99%

Short communication: The beef merit of the sire mated to a dairy female affects her subsequent performance

Berry

Ring

2020

Journal of Dairy Science

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“…However, the genetic aspect of these traits cannot be ignored. Various studies have shown that calf health and survival are genetically determined and that the genetic component can be successfully exploited in breeding programs (Gonzalez‐Peña et al, 2019; Henderson et al, 2011; Pritchard et al, 2013). One possible approach to improve calf survival is to include this trait as a selection criterion in breeding programs, for which the genetic component of the trait must be studied (Ibi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Calf survival is a crucial factor in dairy farming as it impacts herd economic efficiency, genetic progress and animal welfare (Goyache et al, 2003; Magalhaes Silva et al, 2017). Calf and heifer mortality rates have significant implications for genetic potential and the selection process, leading to reduced selection intensity and genetic progress (Henderson et al, 2011). The economic consequences of calf mortality are substantial, representing approximately 4% of the total lifetime cost of a cow (Sischo et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Bayesian estimates of genetic effects on calf survival in Hardhenu (Bos taurus × Bos indicus) cattle

Yadav,

Malik,

Dash

et al. 2023

J Animal Breeding Genetics

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The aim of the present study is to carry out a risk analysis and Bayesian estimates of genetic effects on calf survival in Hardhenu cattle using data records of 2593 calves born to 102 sires and 790 dams over 25 years. The Bayesian analysis using Gibbs sampling was employed towards threshold animal models to estimate direct and maternal effects on animal survival of studied population. The results showed that mortality from birth to 3 months of age (S1), birth to 6 months of age (S2) and birth to 12 months of age (S3) was 10.22, 12.88 and 14.65%, respectively. It was revealed from the results of logistic regression analysis that the male animals had greater risk (1.41–1.61 times) of mortality during S1, S2 and S3 as compared to female animals. However, calves born during rainy season had higher risk (1.36 to 1.44 times) of mortality than calves born during winter season. Among died animals, the simultaneous infection of respiratory and digestive diseases had leading contribution (26.84%–30.19%) to deaths while alone of them contributed to 18%–20% only. On evaluation of six threshold animal models, model 1 was found to be most appropriate model and the Bayesian estimates (95% highest posterior density confidence intervals) of direct additive heritability for S1, S2 and S3 under model 1 were 0.15 ± 0.07 (0.04–0.23), 0.23 ± 0.12, (0.02–0.44) and 0.26 ± 0.06 (0.08–0.41), respectively. It was concluded that the inclusion of survival traits in existing selection criteria may be helpful to increase calf survival and ultimately economic gain in the dairy herd.

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“…Segundo JOHNSON e VAN VLECK (1979), a contribuição desse efeito na variação total na duração do período de gestação e de serviço foi, respectivamente, 4,9 e -0,2%. ADKINSON (1977) estimou que o efeito do pai do bezerro respondeu por 1,9% da variância total do perí-odo de serviço para animais da raça Holandesa e 3,2% para animais da raça Jersey.…”

Section: Introductionunclassified

Efeito do pai do feto sobre as características produtivas e reprodutivas de vacas da raça pitangueiras

Bastos¹,

Lôbo

Duarte

et al. 1999

R. Bras. Zootec.

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RESUMO -Para estimar a magnitude do efeito do pai do feto (PDF) sobre as características produtivas e reprodutivas em fêmeas da raça Pitangueiras, foram analisadas 2287 lactações de 618 vacas, filhas de 82 reprodutores e acasaladas com 68 touros. As análises estatísticas foram executadas usando-se o programa LSMLMW (Mixed Model Least Squares and Maximum Likelihood Computer Program). O PDF não influenciou a produção de leite na lactação subseqüente, porém seu efeito foi significativo para produção e porcentagem de gordura, período de serviço, período de gestação e intervalo de partos. As estimativas dos efeitos do PDF, expressas como porcentagem da variância total foram: 0,81; 1,67; e 6,43%, respectivamente, para produção de leite e produção e porcentagem de gordura. Esta contribuição para as características reprodutivas foi estimada em 7,76% para o período de serviço; 1,23% para o período de gestação; e 7,57% para o intervalo de partos. As implicações genéticas do efeito do PDF sobre as características produtivas foram de pequena importância econômica, contudo, no desempenho reprodutivo, este efeito foi significativo e mensurável.Palavras-chave: bovinos de leite, características produtivas e reprodutivas, pai do feto, raça Pitangueiras Effect of the Sire of Fetus on Productive and Reproductive Traits of Cow fromPitangueiras Breed ABSTRACT -To estimate the magnitude of sire of fetus (SOF) effects on productive and reproductive traits in females of Pitangueiras breed, 2287 lactations of 618 cows, daughters of 82 bulls, mated with 68 sires were analyzed. The statistical analyses were made using LSMLMW program (Mixed Model Least Squares and Maximum Likelihood Computer Program). Sire of fetus (SOF) did not affect the milk production in the subsequent lactation, however its effect was significant for the percent fat and production, days open, gestation length and calving intervals. The estimates of SOF effects, expressed as a percentage of total variance, were .81, 1.67 and 6.43% for milk and percent fat and yield, respectively. This contribution on the reproductive traits was estimated in 7.76% for days open, 1.23% for gestation length and 7.57% for calving intervals. The genetic implications of the effect of SOF on the productive traits had small economic importance, however, on the reproductive performance, this effect was significant and measurable.Key Words: dairy cattle, productive and reproductive traits, sire of fetus, Pitangueiras breed Rev. bras. zootec., v.28, n.5, p.982-986 IntroduçãoO sistema endócrino da fêmea, nos bovinos, interage durante toda a gestação para garantir o crescimento contínuo do feto até o parto. A placenta é a maior unidade produtora de hormônios durante a gestação e, em conjunto com o feto, contribui para mudanças hormonais na circulação materna, possibilitando a maior parte desenvolvimento da glândula mamaria.A variação na produção de leite e o desempenho reprodutivo após o parto podem estar relacionados com diferenças entre os conceptos (feto + placenta) em sua capacidade de estimu...

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Components of Variance Associated with Service Sire for Milk Yield and Reproductive Traits

Cited by 14 publications

References 10 publications

Short communication: The beef merit of the sire mated to a dairy female affects her subsequent performance

Short communication: The beef merit of the sire mated to a dairy female affects her subsequent performance

Bayesian estimates of genetic effects on calf survival in Hardhenu (Bos taurus × Bos indicus) cattle

Efeito do pai do feto sobre as características produtivas e reprodutivas de vacas da raça pitangueiras

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