当交配对中雌雄动物的表型或基因型有关联时(无论次关联是正是负),配型交配便产生了。为了确定动物界配型交配的强度以及方向(正关联同型交配,或负关联异型交配),蒋越昕等三位德克萨斯大学奥斯丁分校的科学家使用泛分析手段对已出版的大量物种类别针对表型或基因型的配型交配测量结果进行了分析。次分析针对的是种群内的配型交配强度,不包括已存在生殖隔离的种群间的配型交配。共采集已出版配型交配测量关联数据1116份,来自分属5门的254个物种(360份独立物种-配型数据)。结果显示动物界种群内的配型交配的平均关联强度为0.2。(生物谷Bioon.com)
生物谷推荐引文摘要:
The American Naturalist DOI: 10.1086/670160
Assortative Mating in Animals
Yuexin Jiang, Daniel I. Bolnick and Mark Kirkpatrick
Assortative mating occurs when there is a correlation (positive or negative) between male and female phenotypes or genotypes across mated pairs. To determine the typical strength and direction of assortative mating in animals, we carried out a meta-analysis of published measures of assortative mating for a variety of phenotypic and genotypic traits in a diverse set of animal taxa. We focused on the strength of assortment within populations, excluding reproductively isolated populations and species. We collected 1,116 published correlations between mated pairs from 254 species (360 unique species-trait combinations) in five phyla. The mean correlation between mates was 0.28, showing an overall tendency toward positive assortative mating within populations. Although 19% of the correlations were negative, simulations suggest that these could represent type I error and that negative assortative mating may be rare. We also find significant differences in the strength of assortment among major taxonomic groups and among trait categories. We discuss various possible reasons for the evolution of assortative mating and its implications for speciation.