Allozyme variability within and divergence among populations of the liverwortConocephalum conicum (Marchantiales: Hepaticae) in Japan
Allozyme variability within and divergence among populations of the liverwortConocephalum conicum (Marchantiales: Hepaticae) in Japan
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日本地钱Conocephalum conicum（Marchantiales：Hepaticae）种群内同种酶的变异性和差异
DOI：
10.1007/bf02344259
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发表时间：
1994
影响因子：
2.8
通讯作者：
T. Hiraoka
中科院分区：
文献类型：
--
作者：
H. Akiyama;T. Hiraoka
通过对17个居群和23个基因位点的研究，估计了苔草居群内的遗传变异和居群间的遗传分化。在日本检测到另外两种多位点基因型（“T”和“FS”），沿着先前报道的“J”型。这三个多位点基因型在形态和生态上都不同。来自日本西部的所有8个群体仅包括J型，并且在群体内表现出低遗传变异：Nei（1973）的平均基因多样性（SNP）=0.080±0.029。与此相反，在关东地区的每个群体中，几个多位点基因型的共同出现导致了更高水平的遗传变异（ε =0.218±0.037）。若区分三种基因型，则T型、FS型和J型的平均遗传距离分别为0.113±0.030、0.107±0.033和0.083±0.018。使用C. Japonicum的遗传变异为0.014±0.010，各基因型形成一个单系分支，J型和FS型的亲缘关系较近。日本西部和关东地区的人群也不同的基因多样性程度的人群之间，但这些差异的原因是模糊的。
Genetic variation within, and divergence among, populations of the liverwortConocephalum conicumwere estimated from the study of 17 populations and 23 putative gene loci. Two additional multilocus genotypes (“T” and “FS”) were detected in Japan, along with the previously reported “J” type. These three multilocus genotypes differed both morphologically and ecologically. All eight populations from western Japan included only the J-type and exhibited low genetic variation within populations: Nei's (1973) average gene diversity (Ĥ)=0.080±0.029. In contrast, co-occurrence of several multilocus genotypes in each population from the Kanto District resulted in much higher levels of genetic variation (Ĥ=0.218±0.037). If the three genotypes are distinguished,Ĥvalues are 0.113±0.030 for T-type, 0.107±0.033 for FS-type, and 0.083±0.018 for J-type. UsingC. japonicum, which showed low genetic variation (0.014±0.010) as an outgroup, each genotype formed a monophyletic clade, and the J- and FS-types were more closely related to each other than to the T-type. Populations of western Japan and the Kanto District also differed in the degree of gene diversity among populations, but the reasons for these differences are obscure.