Evolution of sex-determination in dioecious plants: From active Y to X/A balance?
Evolution of sex-determination in dioecious plants: From active Y to X/A balance?
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DOI：
10.1002/bies.202300111
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发表时间：
2023-09-11
期刊：
影响因子：
4
通讯作者：
Filatov，Dmitry A.
中科院分区：
文献类型：
--
作者：
Kazama，Yusuke;Kobayashi，Taiki;Filatov，Dmitry A.
植物性染色体已为人所知一个世纪了，但直到最近我们才开始了解雌雄异株植物性别决定背后的机制。在这里，我们讨论性别决定的进化，重点是Silene latifolia，其中不同性别的进化与经典的“双突变”模型一致——功能丧失的雄性不育突变和功能获得的雌蕊抑制突变，这将祖先的雌雄同体种群转变为单独的雄性和雌性。有趣的是，S 中的雌蕊抑制功能。 latifolia 是通过至少两个性连锁基因的功能丧失而进化的，并通过性连锁基因和常染色体基因之间的基因剂量平衡发挥作用。该系统类似于果蝇和酸模中基于 X/A 比的性别决定系统，并且可以代表从活跃 Y 系统进化到基于 X/A 比的性别决定的垫脚石。
Sex chromosomes in plants have been known for a century, but only recently have we begun to understand the mechanisms behind sex determination in dioecious plants. Here, we discuss evolution of sex determination, focusing onSilene latifolia, where evolution of separate sexes is consistent with the classic “two mutations” model—a loss of function male sterility mutation and a gain of function gynoecium suppression mutation, which turned an ancestral hermaphroditic population into separate males and females. Interestingly, the gynoecium suppression function inS. latifoliaevolved via loss of function in at least two sex‐linked genes and works via gene dosage balance between sex‐linked, and autosomal genes. This system resembles X/A‐ratio‐based sex determination systems inDrosophilaandRumex, and could represent a steppingstone in the evolution of X/A‐ratio‐based sex determination from an active Y system.