双基因座常染色体性别决定：论均匀性别比的进化遗传稳定性
Two-locus autosomal sex determination: on the evolutionary genetic stability of the even sex ratio.
作者信息
Liberman U, Feldman M W, Eshel I, Otto S P
机构信息
Department of Biological Sciences, Stanford University, CA 94305-5020.
出版信息
Proc Natl Acad Sci U S A. 1990 Mar;87(5):2013-7. doi: 10.1073/pnas.87.5.2013.
In two-locus models of sex determination, there are two kinds of interior (polymorphic) equilibria. One class has the even sex ratio, and the other has equal allele frequencies in the two sexes. Equilibria of the second class may exhibit linkage disequilibrium. The condition for external stability of these second-class equilibria to invasion by a new allele is that the appropriately averaged sex ratio near the equilibrium be moved closer to the even sex ratio than the average among the resident genotypes. However, invasion by a new chromosome depends on the recombination fraction in a way that appears to preclude general results about the evolutionary genetic stability of the even sex ratio in this situation.
在双位点性别决定模型中，存在两种内部（多态）平衡。一类具有均匀的性别比，另一类在两性中具有相等的等位基因频率。第二类平衡可能表现出连锁不平衡。这些第二类平衡对于新等位基因入侵的外部稳定性条件是，平衡附近适当平均的性别比要比常住基因型中的平均值更接近均匀性别比。然而，新染色体的入侵取决于重组率，这似乎排除了在这种情况下关于均匀性别比进化遗传稳定性的一般结果。
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