DOMINANCE IS NOT NECESSARY FOR HETEROSIS - A 2-LOCUS MODEL
DOMINANCE IS NOT NECESSARY FOR HETEROSIS - A 2-LOCUS MODEL
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DOI：
10.1017/s0016672300027142
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发表时间：
1987-06-01
影响因子：
1.5
通讯作者：
MINVIELLE, F
中科院分区：
文献类型：
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作者：
MINVIELLE, F
在双位点模式下，可加性基因通过繁殖组合决定数量性状，在F1中普遍存在杂种优势。只有在同一亲本群体中，每个位点上的最佳等位基因的两个频率都不高时，它才是正的。在F2中，杂种优势取决于两个位点之间的重组率。如果联系紧密，F1的优势在F2中几乎减半。但如果这两个基因是独立的，则杂种优势在F2中保持在与F1相同的水平。
Under a two-locus model with additive genes which combine multiplicatively to determine a quantitative trait, heterosis is generally observed in the F1. It is positive only if both frequencies of the best allele at each locus are not higher in the same parental population. In the F2, heterosis depends on the rate of recombination between the two loci. If linkage is tight, F1 superiority is nearly halved in the F2. But if the two genes are independent, heterosis is maintained in the F2 at the same level as in the F1.