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. 2023 Jun 24;55(4):250.
doi: 10.1007/s11250-023-03665-6.

Comparison of various models for the estimation of heritability and breeding values

Ambreen Hamadani  1   2 , Nazir A Ganai  3 , Nusrat Nabi Khan  3 , Syed Shanaz  3 , Mubashir Ali Rather  4 , Haider A Ahmad  3 , Ruksana Shah  3
Affiliations

Comparison of various models for the estimation of heritability and breeding values

Ambreen Hamadani et al. Trop Anim Health Prod. .

Abstract

The exploration of additive genetic variance for the selection of animals is the central paradigm in quantitative genetics and it is important to use appropriate animal models considering important factors. This study compares various factor effects for heritability and breeding values estimations on data collected on the Corriedale. Overall, the heritability estimates were the highest for birthweight (BW). Both the additive genetic variance and the heritability values were reduced upon adding more random effects. Year-effect as random reduced the heritability except for BW. The highest average accuracy for breeding values for birth, weaning, 6, 9, and 12-month-weights for were 0.656, 0.567, 0.519, 0.486, and 0.515. These were observed for models having sex or sex and parity as fixed effects. It is concluded that fixed and random factors have a significant impact on genetic-factors and breeding-value accuracies and should be considered during selection programs and make the selection program more effective.

Keywords: Animal models; Bayesian models; Generalized linear models; Heritability.

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References

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    1. Hamadani, A., Ganai N.A., Rather, M.A., Raja, T.A., Shabir, N., Ahmad, T., Shanaz, S., Aalam, S. & Shabir, M. 2020. Estimation of genetic and phenotypic trends for wool traits in Kashmir Merino sheep. Indian J Anim Sci. 90, 893--897. - DOI
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    1. Hamadani, A., Ganai, N.A., Alam, S., Mudasir, S., Raja, T.A., Hussain, I., Ahmad, H.A. 2022a. Artificial Intelligence Techniques for the Prediction of Body Weights in Sheep. Indian J. Anim. Res. https://doi.org/10.18805/ijar.b-4831

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