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Selection response and estimation of the genetic parameters for multidimensional measured breast meat yield related traits in a long-term breeding Pekin duck line

  • Xu, Yaxi ;
  • Hu, Jian ;
  • Zhang, Yunsheng ;
  • Guo, Zhanbao ;
  • Huang, Wei ;
  • Xie, Ming ;
  • Liu, Hehe ;
  • Lei, Chuzhao ;
  • Hou, Shuisheng ;
  • Liu, Xiaolin ;
  • Zhou, Zhengkui
  • Received : 2017.11.13
  • Accepted : 2018.03.14
  • Published : 2018.10.01

Abstract

Objective: This study was conducted to estimate the genetic parameters and breeding values of breast meat related traits of Pekin ducks. Selection response was also determined by using ultrasound breast muscle thickness (BMT) measurements in combination with bosom breadth (BB) and keel length (KL) values. Methods: The traits analyzed were breast meat weight (BMW), body weight (BW), breast meat percentage (BMP) and the three parameters of breast meat (BB, KL, and BMT). These measurements were derived from studying 15,781 Pekin ducks selected from 10 generations based on breast meat weight. Genetic parameters and breeding value were estimated for the analysis of the breeding process. Results: Estimated heritability of BMW and BMP were moderate (0.23 and 0.16, respectively), and heritability of BW was high (0.48). Other traits such as BB, KL, and BMT indicated moderate heritability ranging between 0.11 and 0.28. Significant phenotypic correlations of BMW with BW and BMP were discovered (p<0.05), and genetic correlations of BMW with BW and BMP were positive and high (0.83 and 0.66, respectively). It was noted that BMW had positive correlations with all the other traits. Generational average estimated breeding values of all traits increased substantially over the course of selection, which demonstrated that the ducks responded efficiently to increased breast meat yield after 10 generations of breeding. Conclusion: The results indicated that duck BMW had the potential to be increased through genetic selection with positive effects on BW and BMP. The ultrasound BMT, in combination with the measurement of BB and KL, is shown to be essential and effective in the process of high breast meat yield duck breeding.

Keywords

Pekin Duck;Breast Meat;Ultrasound Scanning;Genetic Parameter;Breeding Value

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Acknowledgement

Supported by : National Natural Science Foundation of China