第四十三卷(2014)
畜試土雞高產蛋品系近親係數分析
林德育 賴永裕 蔡秀容 林秀蓮 吳明哲
行政院農業委員會畜產試驗所
畜試土雞高產蛋品系係以行政院農業委員會畜產試驗所畜試土雞台畜一號L7、L9、L11及 L12 等四個近親品系為基礎族群。此四個近親品系在2008年以前是以全同胞配種所建立的品系，而畜試土雞高產蛋品系為自2008年開始進行6個世代產蛋數選育所育成的品系。為瞭解育成品系之近親係數，取用1986年至2014年的畜試土雞之系譜資料進行近親係數分析。品系L7、L9、L11及 L12的系譜資料分別有15,100隻、17,023 隻、20,668 隻 及 15998 隻。分析結果，畜試土雞高產蛋品系L7、L9、L11及L12在2006年的G0世代雞隻之近親係數分別為0.8943 ± 0.0228、0.8859 ± 0.0642、0.8418 ± 0.0546 及 0.8696 ± 0.0512。而在2014年的G8世代雞隻之近親係數分別為0.8318 ± 0.0107、0.8144 ± 0.0120、0.7926 ± 0.0146及0.8031 ± 0.0119。因畜試土雞高產蛋品系非全同胞配種品系L7、L9、L11及L12雞群之近親係數皆略為降低，然而又隨著選育世代數增加各品系近親係數亦隨之增高。
關鍵語：土雞、近親品系、高產蛋品系、近親係數
INBREEDING COEFFICIENTS OF HIGH EGG PRODUCTION LINES IN LRI NATIVE CHICKEN
D. Y. Lin, Y. Y. Lai, H. R. Tsai, H. L. Lin and M. C. Wu
Livestock Research Institute, Council of Agriculture
LRI native chicken-high egg production lines, which was selected for number of eggs based on the inbreeding lines, L7,L9, L11, L12, native chicken of Council of Agriculture Livestock Research LRI for six generation. The inbreeding selection was one generation per year by full-sib mating practiced from 1986 to 2006. Breeding strategy was changed to enhance the egg production from 2008 which selection enhanced on egg production performance, full-sib mating ignored. To assess the inbreeding coefficients of high egg production line breeding populations, we use pedigree data from 1986 to 2014 to analyze the inbreeding coefficients of breeding flocks in each generation. Total pedigree data were 15,100 birds, 17,023 birds, 20,668 birds and 15,998 birds, respectively. The inbreeding coefficients of high egg production line L7, L9, L11 and L12 native chickens in generation G0 at 2006 were 0.8943 ± 0.0228, 0.8859 ± 0.0642, 0.8418 ± 0.0546 and 0.8696 ± 0.0512, respectively. The inbreeding coefficients of high egg production line L7, L9, L11 and L12 native chickens in generation G8 at 2014 were 0.8318 ± 0.0107, 0.8144 ± 0.0120, 0.7926 ± 0.0146 and 0.8031 ± 0.0119, respectively. Results showed the inbreeding coefficients of high egg production line breeding populations in all of the four lines were decrease. However, the inbreeding coefficients of these four lines increased with increasing generation.
Key Words: Native chicken, Inbreeding line, High egg production line, Inbreeding coefficient
  
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