Disassortative mating can increase genetic diversity in a population. 反同配交配可以提高一个种群的遗传多样性。
In some species, disassortative preferences are maintained by selection because mating with dissimilar partners reduces inbreeding and improves offspring fitness. 在一些物种中,反同配偏好会被选择维持,因为与不同的伴侣交配能降低近交并提高后代适合度。