School of Biological Sciences A12, Sydney University, N.S.W. 2006, Australia and Institute of Ecology and Genetics, University of Aarhus, Denmark.
Genetics. 1981 Jan;97(1):197-215. doi: 10.1093/genetics/97.1.197.
It is proposed that mating behavior is normally determined by independent genetic systems in the male and female. A specific model is put forward in which mating behavior is determined by additive gene contributions in both sexes, and the strength of mating attraction is maximized when mating "scores" in the two sexes are equalized. This type of model, which may be described as a "facilitation" model, is related to models proposed by a number of authors. It is pointed out that a second class of models exists, "avoidance" models, and that these, although less tractable analytically, could be more realistic.-An organism is assumed to be divided into two strains, and selection is introduced through lethality or sterility of the hybrid (postmating isolation). The selective tendency for divergence of mating behavior in one sex is then shown to be proportional to the amount of divergence that already exists in the opposite sex, multiplied by a quantity that can be described as the heritability of mating attraction. The situation in which no initial divergence exists in either sex constitutes an equilibrium that is unstable, but one that requires substantial deviations before any selective progress can be made. Thus, the evolution of premating isolation to reinforce postmating isolation may be an inefficient process. The process would occur much more efficiently if some initial chance divergence in mating behavior occurred during the period in which postmating isolation evolved.
有人提出，交配行为通常由雌雄个体独立的遗传系统决定。提出了一个特定的模型，其中交配行为由两性的累加基因贡献决定，当两性的交配“得分”相等时，交配吸引力最强。这种类型的模型可以被描述为“促进”模型，与许多作者提出的模型有关。有人指出，还存在第二类模型，即“回避”模型，尽管这些模型在分析上不太可行，但它们可能更符合实际情况。-假设一个生物体分为两个品系，并通过杂种的致死性或不育性（交配后隔离）引入选择。然后，表明一个性别中交配行为的分歧选择倾向与相反性别中已经存在的分歧量成正比，乘以可以被描述为交配吸引力遗传力的量。在两性中都没有初始分歧的情况下，构成了一种不稳定的平衡，但需要大量偏差才能取得任何选择进展。因此，为了加强交配后隔离而进化的交配前隔离可能是一个效率低下的过程。如果在交配后隔离进化期间，交配行为发生了一些初始的偶然分歧，那么这个过程的效率会更高。
