麦瓶草属两个物种性染色体的独立起源
Independent origin of sex chromosomes in two species of the genus Silene.
作者信息
Mrackova Martina, Nicolas Michael, Hobza Roman, Negrutiu Ioan, Monéger Françoise, Widmer Alexander, Vyskot Boris, Janousek Bohuslav
机构信息
Laboratory of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic.
出版信息
Genetics. 2008 Jun;179(2):1129-33. doi: 10.1534/genetics.107.085670.
Here we introduce a new model species, Silene colpophylla, that could facilitate research of sex chromosome evolution and sex-determining systems. This species is related to the well-established dioecious plant model Silene latifolia. Our results show that S. colpophylla is, similarly to S. latifolia, a male heterogametic species, but its sex chromosomes have evolved from a different pair of autosomes than in S. latifolia. The results of our phylogenetic study and mapping of homologs of S. latifolia X-linked genes indicate that the sex determination system in S. colpophylla evolved independently from that in S. latifolia. We assert that this model species pair will make it possible to study two independent patterns of sex chromosome evolution in related species.
在此，我们引入了一种新的模式物种——皱叶蝇子草（Silene colpophylla），它有助于性染色体进化和性别决定系统的研究。该物种与已被广泛研究的雌雄异株植物模式物种宽叶蝇子草（Silene latifolia）相关。我们的研究结果表明，皱叶蝇子草与宽叶蝇子草一样，是雄性异配性别的物种，但其性染色体是由与宽叶蝇子草不同的一对常染色体进化而来的。我们的系统发育研究结果以及宽叶蝇子草X连锁基因同源物的定位表明，皱叶蝇子草的性别决定系统是独立于宽叶蝇子草进化而来的。我们认为，这一模式物种对将使研究相关物种中性染色体进化的两种独立模式成为可能。
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