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. 2025 May 22;15(11):1512.
doi: 10.3390/ani15111512.

Genetic Evaluation of Early Growth Traits in Yunnan Semi-Fine Wool Sheep

Yaqian Wang  1   2 , Hongyuan Yang  3 , Xiaoqi Zhao  3 , Xiaojun Ni  3 , Yuanchong Zhao  4 , Zhengrong You  5 , Qingwei Lu  1   2 , Sen Tang  2 , Guobo Quan  3 , Xuefeng Fu  2
Affiliations

Genetic Evaluation of Early Growth Traits in Yunnan Semi-Fine Wool Sheep

Yaqian Wang et al. Animals (Basel). .

Abstract

With economic development and improved living standards, the demand for mutton and wool continues to grow, and improving the production performance and genetic potential of sheep breeds has become the key to promoting the high-quality development of the sheep industry. Thus, this study analyzes the influencing factors of the early production traits of Yunnan semi-fine wool sheep, optimizes the genetic evaluation model, and relies on accurate genetic parameter estimation to provide a theoretical basis for formulating a scientific and efficient breeding strategy for this breed. Data were collected from the Laishishan and Xiaohai breeding farms in Qiaojia, Yunnan, covering production records of the core flock from 2018 to 2022. Using the GLM procedure in SAS 9.4 software, this study analyzed the non-genetic influences on early production traits in Yunnan semi-fine wool sheep. Concurrently, Danish Milk Unit 5 (DMU 5) software estimated the variance components across various animal models for each trait. Employing the Akaike Information Criterion (AIC) and likelihood ratio test (LRT), six models were tested, incorporating or excluding maternal inheritance and environmental impacts, to identify the optimal model for deriving the genetic parameters. The results show that the birth year, dam age, sex, flock and litter size significantly affect both the Birth Weight (BWT) and Weaning Weight (WWT) (p < 0.01). Additionally, the birth month was found to exert a significant effect on Birth Weight (BWT) (p < 0.01), the weaning month has a significant effect on the Weaning Weight (WWT) (p < 0.05). No significant effects of farm location were observed on either trait (p > 0.05). The most accurate genetic evaluation model determined the heritability of the Birth Weight (BWT) and Weaning Weight (WWT) as 0.3123 and 0.3471. From a production perspective, improving lamb birth, Weaning Weight (WWT), feed composition, and maternal nutrition during gestation is vital for breeding efficiency. This study not only identified the optimal animal models for early growth traits in Yunnan semi-fine wool sheep, offering a precise basis for estimating genetic parameters but also provides theoretical guidance for genetic selection and breed improvement in this population.

Keywords: Yunnan semi-fine wool sheep; early growth traits; genetic parameters.

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Conflict of interest statement

The authors declare no conflict of interest.

References

    1. Pu X., Ma S., Zhao B., Tang S., Lu Q., Liu W., Wang Y., Cen Y., Wu C., Fu X. Transcriptome Meta-Analysis Reveals the Hair Genetic Rules in Six Animal Breeds and Genes Associated with Wool Fineness. Front. Genet. 2024;15:1401369. doi: 10.3389/fgene.2024.1401369. - DOI - PMC - PubMed
    1. Alberto F.J., Boyer F., Orozco-terWengel P., Streeter I., Servin B., de Villemereuil P., Benjelloun B., Librado P., Biscarini F., Colli L., et al. Convergent Genomic Signatures of Domestication in Sheep and Goats. Nat. Commun. 2018;9:813. doi: 10.1038/s41467-018-03206-y. - DOI - PMC - PubMed
    1. Zhao Y.C., Yang H.Y., Zhou D.Y., Hu Z.R., Xiao M.F., Liu W.B. Genetic Resource Investigation and Analysis of Yunnan Semi-fine Wool Sheep. Livest. Poult. Breed. 2009;5:56–57. (In Chinese)
    1. Wang W.H. Conservation and Utilization of Yunnan Semi-fine Wool Sheep. Yunnan J. Anim. Sci. Vet. 2009;S1:42–43. (In Chinese)
    1. Zhao Y.G., Hong Q.H., Xie P., Chen G.P., Wang W.H. Study on Yunnan Semi-wool Sheep Production Performance. J. Domest. Anim. Ecol. 2011;32:51–56. (In Chinese)

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