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首页> 外文会议>Second International Conference on Sustainable Agriculture for Food, Energy and Industry Vol.1 Sep 8-13, 2002 Beijing, China >Crossbreeding Effects of Growth Traits in Sheep
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Crossbreeding Effects of Growth Traits in Sheep

机译：绵羊生长性状的杂种效应

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摘要

The data on 15 genetic groups (F_1, F_2's and reciprocal crossbreds) obtained from crossing Nali (N), Merino (M) and Corriedale breeds were used to estimate crossbreeding effects of growth traits. Nali had non significant negative additive genetic effects (Dickerson's model) on all body weights and daily weight gain while positive for Merino and Corriedale breeds. Crossbreds of Nali with Merino and Corriedale showed non-significant negative heterosis for all traits but negative heterotic effects for crosses of Merino and Corriedale breeds were negative up to six months age and positive for later ages. Results from Kinghorn's model were different than obtained from Dickerson's model for all the traits. Recombination effects (epistatic loss) were non significant for all traits. There occurred not much segregation of genes on inverse crossing of the F1's.
机译：从Nali（N），Merino（M）和Corriedale杂交后代获得的15个遗传组（F_1，F_2和反向杂交）的数据用于估计生长性状的杂交效果。纳利对所有体重和日增重均无显着的负加性遗传效应（Dickerson模型），而对美利奴羊和Corriedale犬种则为正。 Nali与Merino和Corriedale的杂种对所有性状均显示不显着的负杂种优势，但对Merino和Corriedale品种的杂种而言，杂种的负面杂种效应在六个月龄之前均为阴性，而在以后的年龄则为阳性。对于所有特征，金霍恩模型的结果与迪克森模型的结果不同。重组效应（上位性丧失）对所有性状均不显着。 F1的反向杂交没有发生太多的基因分离。

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