The selfing syndrome and beyond: diverse evolutionary consequences of mating system transitions in plants
The selfing syndrome and beyond: diverse evolutionary consequences of mating system transitions in plants
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DOI：
10.1098/rstb.2020.0510
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Takashi Tsuchimatsu;Sota Fujii
中科院分区：
文献类型：
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作者：
Takashi Tsuchimatsu;Sota Fujii
从异交到自交(自交)的转变被认为是开花植物中最普遍的进化转变之一。自交物种往往在形态和功能上具有相似的生殖特征，这种特征被称为“自交综合征”。尽管进化生物学家对自体综合征的遗传基础非常感兴趣，但直到最近，人们对致病基因或突变的了解还很有限。由于群体基因组方法的进步和高通量测序技术的结合，一些研究已经成功地揭开了山葵、拟南芥、茄子和其他属植物自交综合征进化的分子和遗传基础。在这里，我们首先介绍最近的研究例子，这些例子探索了导致自交综合征性状的基因座、基因和突变，例如花瓣尺寸减小或花粉产生，这些主要与授粉前过程有关。其次，我们回顾了自交的进化和种间花粉转移之间的关系，重点介绍了授粉后生殖障碍在分子水平上的发现。然后，我们讨论了关于自体综合征进化模式的新兴观点，例如功能缺失突变的普遍参与，以及选择与中性退化的相对重要性。本文是《适应和物种形成的遗传基础：从基因座到致病突变》主题的一部分。
The shift from outcrossing to self-fertilization (selfing) is considered one of the most prevalent evolutionary transitions in flowering plants. Selfing species tend to share similar reproductive traits in morphology and function, and such a set of traits is called the ‘selfing syndrome’. Although the genetic basis of the selfing syndrome has been of great interest to evolutionary biologists, knowledge of the causative genes or mutations was limited until recently. Thanks to advances in population genomic methodologies combined with high-throughput sequencing technologies, several studies have successfully unravelled the molecular and genetic basis for evolution of the selfing syndrome in Capsella, Arabidopsis, Solanum and other genera. Here we first introduce recent research examples that have explored the loci, genes and mutations responsible for the selfing syndrome traits, such as reductions in petal size or in pollen production, that are mainly relevant to pre-pollination processes. Second, we review the relationship between the evolution of selfing and interspecific pollen transfer, highlighting the findings of post-pollination reproductive barriers at the molecular level. We then discuss the emerging view of patterns in evolution of the selfing syndrome, such as the pervasive involvement of loss-of-function mutations and the relative importance of selection versus neutral degradation. This article is part of the theme issue ‘Genetic basis of adaptation and speciation: from loci to causative mutations’.