Genetic differentiation without concordant morphological divergence in the thallose liverwortConocephalum conicum
Genetic differentiation without concordant morphological divergence in the thallose liverwortConocephalum conicum
复制标题
藻糖地钱Conocephalum conicum 中无一致形态分化的遗传分化
DOI：
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发表时间：
1991
影响因子：
1.9
通讯作者：
J. Szweykowski
中科院分区：
文献类型：
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作者：
I. Odrzykoski;J. Szweykowski
对96个居群的33个酶位点进行了等位酶变异分析。(Marchantiales Hepaticae)。变异被分为5个不同的组，这表明这种形态上确定的物种在遗传上是异质的。以遗传距离来衡量，这些类群之间的分化程度与通常报道的不同维管植物物种之间的分化程度一样大，比同种居群之间的分化程度大得多。在欧洲，这两个遗传上不同的群体（S和L）是同属的，但显然不会杂交。其他三个类群（A、C和J）的地理分布范围可能是异域的，但S的分布范围与北美的A类群重叠，S是遗传差异最大的类群。这五个自然组合可能是不同的兄弟种。
Allozyme variation was examined at 33 enzyme loci for 96 populations from throughout the geographical range ofConocephalum conicum (L.)Dum. (Marchantiales, Hepaticae). Variation was partitioned into five discrete groups, suggesting that this morphologically defined species is genetically heterogeneous. The degree of differentiation among these groups, as measured by genetic distance, is as large as is commonly reported between different vascular plant species, and much larger than that between conspecific populations. In Europe, two of these genetically distinct groups (S and L) occur sympatrically, but apparently do not interbreed. Geographical ranges of the other three groups (A, C, and J) are probably allopatric with the exception that the range of S, the most genetically divergent group, overlaps with group A in N. America. It is suggested that these five natural assemblages constitute different sibling species.