畜試土雞近親品系九與來亨雞正反雜交後裔之生長與繁殖性能

利用畜試土雞近親品系九（L9）與畜試所單冠來亨雞P品系（P）建立雞基因定位研究之參考族群，於進行正反雜交產生雜交一代後，再以全同胞配種生產雜交二代。雜交一代組合為P9（來亨雞P♂×L9♀）與9P（L9♂×來亨雞P♀）。比較不同雜交組合之雜交一代與雜交二代雞隻的生長與繁殖性能之表現。結果顯示雜交一代之9P達16週齡之體重在雄雞與雌雞皆較P9重（P＜0.01），而雜交二代之P9達16週齡之體重在雄雞與雌雞皆較9P重（P＜0.05）。雜交一代9P母雞亦有較高的40週齡體重（P＜0.01）；而雜交一代之P9母雞則較9P母雞有較高的40週齡產蛋數（P＜0.001）與較重的40週齡蛋重，且初產日齡亦較早（P＜0.05），但在雜交二代母雞之產蛋數與初產日齡則無顯著差異。雜交二代P9母雞的40週齡蛋重則較9P母雞者重（P＜0.001），初產日齡、初產體重、40週齡體重及40週齡產蛋數9P與P9母雞間皆無顯著差異。顯示來自公雞的Z染色體可能影響到後代母雞初產日齡與40週齡產蛋數。

關鍵字

畜試土雞；來亨雞；雜交

並列摘要

The F1 hybrid progenies were produced from reciprocal crosses between LRI native chicken inbred line 9 (L9) and Leghorn (P), and F2 were produced by F1 full-sib mating. The hybrid P9 was produced by L9 hen mated with P rooster, and 9P was produced by P hen mated with L9 cock. The growth and reproductive traits of F1 and F2 from different mating designs were examined. Results showed the body weights at 16 weeks of 9P were heavier than P9 in both genders of F1, and the cockerels of 9P are also heavier than those of P9 (P ＜ 0.001). The body weight at 40 weeks of P9 was significant lighter than 9P in F1 hens (P ＜ 0.01). F1 hens of P9 produced more eggs up to 40 weeks of age (P ＜ 0.001) and had earlier age at first egg (AFE). However, the age at first laying and the egg numbers up to the 40 weeks of age (EN40) did not differ significantly between P9 and 9P in F2. The egg weight at 40 weeks of P9 was heavier than those of 9P in F2. Neither F1 nor F2 differed significantly between P9 and 9P for body weight at first laying and broody days up to 40 weeks of age. The results indicated Z chromosome from sire could influence the AFE and EN40 of daughters.

並列關鍵字

LRI native chicken ； Leghorn ； Hybrid

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