Sire x herd interactions for weaning weight in beef cattle.

@article{Notter1992SireXH,
  title={Sire x herd interactions for weaning weight in beef cattle.},
  author={David R Notter and Bruce Tier and Karin Meyer},
  journal={Journal of animal science},
  year={1992},
  volume={70 8},
  pages={
          2359-65
        }
}
Weaning weight records of 44,357 Australian Angus calves produced by 1,020 sires in 90 herds were used to evaluate the importance of sire x herd interactions. Models fitted fixed effects of contemporary group (herd-year-date of weighing subclass), sex, calf age, and dam age and random effects of sire or of sire and sire x herd interaction using REML. Effects of standardizing the data, including sire relationships and including dam maternal breeding values (MBV) as a covariate were also… 
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48 Citations

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Citation Type

Comparison of models to estimate genetic effects of weaning weight of Angus cattle.
TLDR
Comparisons of models suggest that r(am) may be biased downward if SH interaction and(or) grandmaternal effects are not included in models for weaning weight, and that the effects of sire x herd-year interaction on the genetic parameters should be investigated.
Weaning performance of beef Hungarian Fleckvieh calves: 3. Genotype × environment interaction
TLDR
Important and significant (P<0.001) sire × population interaction were found in case of the two traits in Hungarian Fleckvieh breed.
Sire × contemporary group interactions for birth weight and preweaning growth traits in the Asturiana de los Valles beef cattle breed
Estimation of correlation between maternal permanent environmental effects of related dams in beef cattle.
TLDR
The linear relationship between maternal permanent environmental effects of dams and their daughters for weaning weight is negative but low in both breeds, and thus, it may not be important in genetic evaluations.
Variance of interaction effects of sire and herd for yield traits of Holsteins in California, New York, and Pennsylvania with an animal model.
TLDR
An animal model with a REML algorithm was used to estimate variances of additive genetic effects and interaction effects of sire and herd and sums of variances were similar to those used for national genetic evaluations in the US.
Sire x ecological region interaction in Bonsmara cattle
TLDR
The results indicate that for the purpose of genetic evaluation, the three bushveld regions need not be separated, but that it would be advisable to consider the highveld region as a separate environment and confirmed that the interaction between sire and contemporary group (HYS) is usually more important than between sires and any designated region.
Estimates of genetic parameters for weaning weight of beef cattle accounting for direct-maternal environmental covariances
Index selection in terminal sire sheep: implications for genetic improvement in a crossbreeding system
TLDR
Evaluated the effectiveness of index selection among TS on the BW and ADG of their crossbred offspring and compared the efficacy of that selection within TS breeds, finding Suffolk sired lambs were on average heavier at all ages, with greater ADG, while Charollais sires were lightest with smallest ADG.
Selection of a suitable definition of environment for the estimation of genotype × environment interaction in the weaning weight of beef cattle
TLDR
Genotype × environment interactions for weaning weight in beef cattle should be included in a genetic evaluation model for interbreed comparisons of beef cattle in the Czech Republic.
Within-herd heritability estimated with daughter-parent regression for yield and somatic cell score.
TLDR
Within-herd heritability can be estimated rapidly using regression techniques with moderate accuracy, but adjusting lactation records for h(WH)(2) resulted in only a small improvement in the accuracy of genetic evaluations, which had a minimal impact on breeding value bias.
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References

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TLDR
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