Imposing Restriction in Selection for Disproportionate Cut-Up Carcass Yield in an Experimental Flock of Broiler Chicken

この論文にアクセスする

この論文をさがす

著者

抄録

An experimental flock consisted of five broiler strains was used to evaluate the response to selection for breast and thighs weight with imposing restriction against low value portions of carcass over three generations. The linear models fitted for mean breast yield (BY), legs yield (LY), low value portions yield (LVPY), against generation showed an average improvement of 0.5%, 0.05%, and -0.2% per generation, respectively. The initial mean values for these traits were 21.6%, 22.8% and 29.1%, respectively. Genetic group showed significant influence on all the traits. Carcass weight (CW), breast weight (BW), legs weight (LW) and low value portions weight (LVPW) were significantly influenced by gender. Rate of feathering exhibited a significant impact on CW, BW, BY, and LW. Based on pooled data, the heritability estimate for CW, BW, LW and LVPW was 0.14, 0.16, 0.17 and 0.17, respectively. The estimate for corresponding yield traits was 0.11, 0.39, 0.10 and 0.31. Genetic correlations between absolute weight of carcass and cut-up parts were generally high (>0.85). However, the yield traits showed low correlations ranging from -0.05 to 0.22 with carcass weight. Imposing restriction for low value portions of carcass was found to be effective but merely through improvement in breast weight and yield. Negative influence of such a policy on thighs yield might be minimized using higher relative economic values for thighs weight in index construction process. Considering BY and LVPY instead of BW and LVPW in selection programs to create and improve particular lines could be more efficient based on their genetic characteristics and irrespective of constant lower variability in BY and LVPW.

収録刊行物

  • The journal of poultry science  

    The journal of poultry science 43(2), 109-119, 2006-04-25 

    日本家禽学会

参考文献:  42件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10018128097
  • NII書誌ID(NCID)
    AA11564513
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13467395
  • NDL 記事登録ID
    7893691
  • NDL 雑誌分類
    ZR22(科学技術--農林水産--畜産)
  • NDL 請求記号
    Z54-J694
  • データ提供元
    CJP書誌  NDL  J-STAGE 
ページトップへ