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    刘嘉, 李富贵, 苗小猛, 等. 绿壳蛋鸡及杂交组合的体尺性状与屠宰性能分析[J]. 华南农业大学学报, 2019, 40(1): 59-64. DOI: 10.7671/j.issn.1001-411X.201804026
    引用本文: 刘嘉, 李富贵, 苗小猛, 等. 绿壳蛋鸡及杂交组合的体尺性状与屠宰性能分析[J]. 华南农业大学学报, 2019, 40(1): 59-64. DOI: 10.7671/j.issn.1001-411X.201804026
    shu
    LIU Jia, LI Fugui, MIAO Xiaomeng, et al. Analysis on body size and slaughter performance of Green-shell chickens and hybrid combinations[J]. Journal of South China Agricultural University, 2019, 40(1): 59-64. DOI: 10.7671/j.issn.1001-411X.201804026
    Citation: LIU Jia, LI Fugui, MIAO Xiaomeng, et al. Analysis on body size and slaughter performance of Green-shell chickens and hybrid combinations[J]. Journal of South China Agricultural University, 2019, 40(1): 59-64. DOI: 10.7671/j.issn.1001-411X.201804026
    shu

    绿壳蛋鸡及杂交组合的体尺性状与屠宰性能分析

    Analysis on body size and slaughter performance of Green-shell chickens and hybrid combinations

      摘要
    • 摘要:
      目的  探究绿壳蛋鸡配套系最佳的配套组合模式。
      方法  测定绿壳蛋鸡纯系(LK)和2个杂交组合旧院黑鸡×绿壳蛋鸡(JL)、绿壳蛋鸡×芦花鸡(LL)300日龄体尺性状及屠宰性能，并分析体尺性状及屠宰性能之间的相关性，建立屠宰性状的最佳回归方程。
      结果  LL的胸深、胫围小于LK和JL，胫长反之，LK的冠高为三者中最高。LK、JL、LL母鸡300日龄活体质量均达1 700 g以上，屠宰率均达87.00%以上，全净膛率分别为53.50%、59.35%和61.39%。LL的皮脂厚最大，胸肌率高于JL，腹脂质量和腹脂率低于JL；LL和JL的全净膛率均大于LK，LK和LL的胸肌率均大于JL(P<0.05)。体斜长、胫围、龙骨长等体尺性状与屠宰性能之间存在显著相关(P<0.05)。建立了屠宰性能与体尺性状的最佳回归方程，半净膛质量、全净膛质量、皮脂厚、全净膛率、胸肌率与相关体尺性状回归模型中R2均高于0.4。
      结论  LL比JL、LK具有更好的肉用性能；胫围、龙骨长、胸深等可作为间接选择绿壳蛋鸡屠宰性能的指标；本研究成功构建了通过体尺性状评估屠宰性状的回归方程。

       

      Abstract:
      Objective  To investigate a better model to support crossing system of Green-shell chickens.
      Method  The hens of Green-shell chicken (LK) and two cross combinations of Jiuyuan black cocks×Green-shell layers (JL) and Green-shell cocks×Luhua layers (LL) at the age of 300-day-old were randomly sampled. Their body sizes and slaughter performance were measured. The correlations between body sizes and slaughter performance were analyzed and the best regression equations for carcass traits were established.
      Result  The chest depth and shinbone girth of LL were shorter compared with LK and JL, while the shank length was longer. The comb height of LK was the highest among three groups. The average living body weights for 300-day-old hens from three populations were more than 1 700 g, their slaughter rates were over 87%, and the eviscerated rates of LK,JL and LL were 53.50%, 59.35% and 61.39%, respectively. As for LL, its subcutaneous fat thickness was greater compared with other groups, its breast muscle rate was higher than that of JL, and its abdominal fat weight and abdominal fat rate were less than those of JL (P<0.05). The eviscerated carcass rates of LL and JL were greater than that of LK, and the breast muscle rates of LK and LL were greater than that of JL. The correlations between slaughter performance and some body size traits such as shinbone girth, keel length and chest depth were significant (P<0.05). The optimal linear regression equations of slaughter performance and body measurement traits were established. TheR2 for regression models of half-eviscerated weight, eviscerated weight, subcutaneous fat thickness, eviscerated rate and breast muscle rate were above 0.4.
      Conclusion  LL has better meat performance compared with LK and JL. Shinbone girth, keel length, and chest depth can be used as indirect indexes for selecting slaughter performance of Green-shell chickens. We have successfully established regression equations for evaluating slaughter performance through body size traits.

       

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