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

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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.

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Data availability

The datasets generated during and/or analysed during the current study are not publicly available due to restrictions but are available from the corresponding author on reasonable request.


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This work was supported by the Department of Science and Technology, Govt of India.

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NAG & AH conceived the experiment, AH performed the experiment, AH, NNK & HA compiled the data, AH performed the analysis, AH, NAG SS and MAR wrote the manuscript and proofread it.

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Correspondence to Ambreen Hamadani.

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Hamadani, A., Ganai, N.A., Khan, N.N. et al. Comparison of various models for the estimation of heritability and breeding values. Trop Anim Health Prod 55, 250 (2023).

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