Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (5): 1364-1372.doi: 10.11843/j.issn.0366-6964.2022.05.005

• ANIMALGENETICS AND BREEDING • Previous Articles     Next Articles

Comparing the Accuracy of Estimated Breeding Value by Several Algorithms on Laying Traits in Broilers

DING Jiqiang, LI Qinghe, ZHANG Gaomeng, LI Sen, ZHENG Maiqing, WEN Jie, ZHAO Guiping*   

  1. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2021-08-16 Online:2022-05-23 Published:2022-05-25

Abstract: It is an important aspect to raise the number of eggs and control the appropriate egg weight by genetic way in the breeding of white-feather broilers in China. In order to explore the genome selection model suitable for the breeding of Chinese white-feather broilers, this study took 2 474 white-feather broilers, mainly analyzed the prediction accuracy of the machine learning algorithms KAML, BLUP (including:PBLUP, GBLUP, SSGBLUP) and Bayes (Bayes A, Bayes B and Bayes Cπ) methods in predicting egg number and egg weight traits. And the prediction accuracy was evaluated by 5-fold cross validation. The heritability and genetic correlation of the traits of egg number and egg weight were estimated using pedigree and genomic information. The results showed that the heritability of egg number was 0.061-0.16, which was a low heritability trait. The heritability of egg weight was 0.28-0.39, which was a medium heritability trait. The egg number and egg weight had a medium negative genetic correlation (-0.518——0.184). There was a strong positive genetic correlation (0.736-0.998) between the number of eggs laid at different stages. The accuracy of breeding value estimation for egg number (43 weeks) and egg weight (52 weeks)predicted by different models showed that the prediction accuracy of KAML method were 0.115 and 0.266, respectively, which were significantly different from that of GBLUP method (0.118 and 0.283) and SSGBLUP method (0.136 and 0.259), and were significantly lower than that of Bayes method (accuracy:0.230-0.239, 0.336-0.340). PBLUP method had the lowest prediction accuracy (0.095 and 0.246, respectively). Therefore, the Bayes method for the egg number and egg weight traits of white-feather broilers will achieve the highest accuracy of breeding value estimation.

Key words: white-feather broilers, laying trait, genomic selection, machine learning, genetic parameter

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