Patterns of hybridization in a multispecies hybrid zone in the Ranunculus cantoniensis complex ( Ranunculaceae)
Patterns of hybridization in a multispecies hybrid zone in the Ranunculus cantoniensis complex ( Ranunculaceae)
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广州毛茛复合体（毛茛科）多物种杂交区的杂交模式
DOI：
10.1111/boj.12113
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发表时间：
2014-02-01
影响因子：
2.4
通讯作者：
Han, Xingjie
中科院分区：
文献类型：
--
作者：
Li, Tongjian;Xu, Lingling;Han, Xingjie
自然界中有三个或更多的亲本类群同时杂交的现象，但很少被分析。本研究调查了中国西南部一个微地理区域内广州毛茛复合体二倍体成员的自然杂交。母系遗传的质体DNA（trnQ-rps 16和rpL 32-trnL）和双亲遗传的核核糖体DNA的序列信息被用来识别杂种，这些进一步证实了花粉活力的急剧下降。从接触区的人口包含的个人，有两个以上的核核糖体内转录间隔区（nrITS）类型;此外，网络分析显示，存在的核和质体DNA数据之间的硬冲突。这些结果证明了三角红杜鹃和银叶红杜鹃的亲缘关系。长棘鲷彼此之间的生殖隔离相对较少，导致接触种群中的高基因流动率。四个物种在此接触区可以相互杂交，形成七个杂交类型。(c)2014年，伦敦林奈学会，林奈学会植物学杂志，2014年，174，227-239。
Simultaneous hybridizations among three or more parental taxa occur in nature, but these have rarely been analysed. The present study investigates the natural hybridization of diploid members of the Ranunculus cantoniensis complex over a microgeographical area in south-western China. Sequence information from maternally inherited plastid DNA (trnQ-rps16 and rpL32-trnL) and biparentally inherited nuclear ribosomal DNA was used to identify hybrids, and these were further confirmed by a dramatic reduction in pollen viability. The populations from the contact zone contained individuals that had more than two nuclear ribosomal internal transcribed spacer (nrITS) types; in addition, a network analysis revealed the presence of hard conflicts between the nuclear and plastid DNA data. These results prove that R.trigonus and R.silerifolius var. dolicanthus have relatively little reproductive isolation from each other, leading to a high gene flow rate in contact populations. The four investigated species can hybridize with each other in this contact zone, forming seven hybrid types.(c) 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 174, 227-239.