ANIMALS MIX IT UP TOO: THE DISTRIBUTION OF SELF-FERTILIZATION AMONG HERMAPHRODITIC ANIMALS
ANIMALS MIX IT UP TOO: THE DISTRIBUTION OF SELF-FERTILIZATION AMONG HERMAPHRODITIC ANIMALS
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动物也将其混合：雌雄同体动物中自体受精的分布
DOI：
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Josh R Auld
中科院分区：
文献类型：
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作者：
P. Jarne;Josh R Auld
摘要除昆虫外，约三分之一的动物都有雌雄同体现象，这为动物的自交进化提供了大量的机会。在这里，我们提供了一个两性动物物种的繁殖性状的概述，审查动物的自交率的分布，并测试自交的生态相关性。我们的数据集（1342 selfing-rate估计为142种）是97%的基础上，来自人口结构的分析（FIS估计），使用遗传标记的估计。自交系的分布略？与之不同的是，更大的区别在于，形植物分布，47%的动物t估计值为中间值（介于0.2和0.8之间），而植物为42%。探讨了几个因素对自交率分布的影响（例如，每个物种研究的种群数量，栖息地，殖民地，无柄性，或施肥类型），没有一个显着影响分布。我们的研究结果表明，遗传力量可能在动物和植物中同样程度地促进了自花受精的进化，尽管中间异交的高比例表明生态因素的重要作用（例如，动物的生殖安全。然而，我们警告说，动物中自交率的分布受到各种因素的影响，这些因素可能会使FIS的估计产生偏差，包括高度自交和异交物种的系统发育代表性不足，各种基因分型错误（例如，无效等位基因）和近交衰退。这突出了获得更好的估计雌雄同体动物，如基因分型后代阵列，在植物中的自交的必要性。
Abstract Excluding insects, hermaphroditism occurs in about one-third of animal species, providing numerous opportunities for the evolution of selfing. Here we provide an overview of reproductive traits in hermaphroditic animal species, review the distribution of selfing rates in animals, and test for ecological correlates of selfing. Our dataset (1342 selfing-rate estimates for 142 species) is 97% based on estimates derived from the analysis of population structure (FIS-estimates) using genetic markers. The distribution of selfing is slightly ?-shaped and differs significantly from the more strongly ?-shaped plant distribution with 47% of animal t-estimates being intermediate (falling between 0.2 and 0.8) compared to 42% for plants. The influence of several factors on the distribution of selfing rates was explored (e.g., number of populations studied per species, habitat, coloniality, sessility, or fertilization type), none of which significantly affect the distribution. Our results suggest that genetic forces might contribute to the evolution of self-fertilization to the same extent in animals and plants, although the high proportion of intermediate outcrossing suggests a significant role of ecological factors (e.g., reproductive assurance) in animals. However, we caution that the distribution of selfing rates in animals is affected by various factors that might bias FIS-estimates, including phylogenetic underrepresentation of highly selfing and outcrossing species, various genotyping errors (e.g., null alleles) and inbreeding depression. This highlights the necessity of obtaining better estimates of selfing for hermaphroditic animals, such as genotyping progeny arrays, as in plants.
影响因子：
10.7
作者：
DeJong, RJ;Morgan, JAT;Loker, ES
通讯作者：
Loker, ES