摘要
本研究采用不完全双列杂交法估测莆田黑鸭４个父系与４个母系组成的１６个组合的配合力。结果表明：３００日龄产蛋数父系间和母系间的一般配合力差异极显著，各组合的特殊配合力差异也极显著。３００日龄蛋粒重各配合力差异均不显著。开产日龄和３００日龄平均总蛋重与３００日龄产蛋数有显著的相关性，其相关系数分别为－０．９０９１和０．８５５７。３００日龄产蛋数一般配合力的基因型方差为０．４９９４，特殊配合力的基因型方差为０．５００６。３００日龄产蛋数的广义遗传力和狭义遗传力分别为０．４９２３和０．２４５８。
Sixteen hybrid combinations from four paternal lines A, B, C, D and four maternal lines E, F,G, H were tested for their combining ability. A significant difference of general combining ability of egg num her and egg weight at 300-day age was found between paternal and maternal lines by using Liu Laifu's incom plete diallel crossing method. The experimental results showed that line B and line F exhibited the highed general combining ability and hybrid combinations BE, CF, BH exhibited highest specific combining abili ty. Estimated genotypic variance of general and specific combining abilities were 49.94% and 50.06% respectively. Estimated narrow and broad heritabilities Of egg number at 300-day age were 0.2458 and 0.4923. There were significant correlations between total averaged egg weight at first laying and 300-day ages with egg number at 300-dy age. The correlative coefficients were-0.9091 and 0.8557 respectively.
关键词
蛋鸭
双列杂交
配合力
Laying duck
Diallel crossing
Combining ability
