Evolution of alternative sex-determining mechanisms in teleost fishes
Evolution of alternative sex-determining mechanisms in teleost fishes
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DOI：
10.1111/j.1095-8312.2006.00558.x
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发表时间：
2006-01-01
影响因子：
1.9
通讯作者：
Avise, JC
中科院分区：
文献类型：
--
作者：
Mank, JE;Promislow, DEL;Avise, JC
本文从文献资料中整理了硬骨鱼在雌雄同体、雌雄同体、雌雄同体和环境依赖性等不同性别决定系统的分类分布。然后，利用最近发表的基于全基因组或部分线粒体DNA序列的分子系统发育，我们通过系统发育特征定位的最大简约和最大似然方法推断出这些生殖模式之间的历史和进化转变。在涉及25个分类目的广泛硬骨鱼系统发育中，发现了不同性别决定机制的高度不均匀分布，这意味着在不同模式之间有许多转变，但这种异质性也妨碍了对大多数进化枝的祖先状态的明确陈述。对四目中每一目的科级和属级系统发育的进一步观察，进一步支持了性别决定模式的转变在进化上是频繁的，并且涉及各种不同的祖先-后代途径的结论。由于本文讨论的可能原因，鱼类性别决定模式的进化不稳定性与哺乳动物和鸟类性别决定的进化保守性形成鲜明对比。(c) 2006年伦敦林奈学会。
We compiled information from the literature on the taxonomic distributions in extant teleost fishes of alternative sex-determination systems: male-heterogametic (XY) gonochorism, female-heterogametic (ZW) gonochorism, hermaphroditism, unisexuality, and environmental dependency. Then, using recently published molecular phylogenies based on whole-genomic or partial mitochondrial DNA sequences, we inferred the histories and evolutionary transitions between these reproductive modes by employing maximum parsimony and maximum likelihood methods of phylogenetic character mapping. Across a broad teleost phylogeny involving 25 taxonomic orders, a highly patchy distribution of different sex-determination mechanisms was uncovered, implying numerous transitions between alternative modes, but this heterogeneity also precluded definitive statements about ancestral states for most clades. Closer inspection of family-level and genus-level phylogenies within each of four orders further bolstered the conclusion that shifts in sex-determining modes are evolutionarily frequent and involve a variety of distinct ancestral-descendant pathways. For possible reasons discussed herein, the evolutionary lability of sex-determining modes in fishes contrasts strikingly with the evolutionary conservatism of sex determination within both mammals and birds. (c) 2006 The Linnean Society of London.