Inconsistency between morphological diversity and genetic structuring: proposal for one species of Undaria in Japan
Inconsistency between morphological diversity and genetic structuring: proposal for one species of Undaria in Japan
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DOI：
10.1515/bot-2022-0048
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发表时间：
2023-01
期刊：
影响因子：
2.2
通讯作者：
S. Uwai;S. Takagi;Takuma Sekiguchi;Nozomi Emura;T. Morita;A. Kurashima;Yoichi Sato
中科院分区：
文献类型：
--
作者：
S. Uwai;S. Takagi;Takuma Sekiguchi;Nozomi Emura;T. Morita;A. Kurashima;Yoichi Sato
遗传结构分析已经产生了一些遗传信息与形态信息不一致的例子。利用11个核微卫星标记和线粒体单倍型，分析了日本裙带菜居群与同属种裙带菜和peterseniana的遗传结构和基因流。基于贝叶斯聚类分析、邻网分析和主坐标分析（PCoA），将裙带菜种群划分为4个“类群”。Undaria undaroides样品形成了一个独特的类群。相比之下，peterseniana样品要么与羽石楠和羽石楠的混合群分组，要么被包括在一个羽石楠群中。更重要的是，群体甚至在不同形态种之间与地理上相邻的群体共享等位基因。核标记和线粒体标记均未发现种间和种内遗传差异。结果，山茱萸和peterseniana与山茱萸同义。按距离隔离表明地理隔离对维持所观察到的差异的重要性。
Abstract Genetic structure analyses have yielded some examples of inconsistencies between genetic and morphological information. Here, eleven nuclear microsatellite markers and mitochondrial haplotypes were used to examine the genetic structure and gene flow among Japanese Undaria pinnatifida populations and the congeneric species U. undarioides and U. peterseniana. Undaria pinnatifida was subdivided into four “Groups” of populations based on Bayesian clustering analysis, Neighbor-net analysis and Principal coordinate analysis (PCoA). Undaria undarioides samples formed a unique Group. In contrast, U. peterseniana samples either grouped with a mixture of U. pinnatifida and U. undarioides clusters or were included within one of the U. pinnatifida clusters. More significantly, Groups of populations shared alleles with geographically adjacent Groups even between different morphospecies. No clear differences between the inter-and intra-specific genetic divergence were observed in either nuclear or mitochondrial markers. As a result, U. undarioides and U. peterseniana were synonymized with U. pinnatifida. Isolation-by-distance suggested the significance of geographical isolation for maintaining the observed divergence.