Morphological-molecular incongruence in Sphagnum majus ssp. majus and ssp. norvegicum
Morphological-molecular incongruence in Sphagnum majus ssp. majus and ssp. norvegicum
复制标题
Sphagnum majus ssp 中的形态分子不一致。
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
A. J. Shaw
中科院分区：
文献类型：
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作者：
Marta Nieto;S. Robinson;Blanka Aguero;Aaron M. Duffy;Karn Imwattana;K. Hassel;K. Flatberg;H. Stenøien;A. Shkurko;V. Fedosov;A. J. Shaw
抽象。在许多植物类群中，物种划分是有问题的，在苔藓中，泥炭藓是一个更有争议的属，因为它的形态变化很大。异源多倍体物种大泥炭藓（Sphagnummajus）就是这样一个有问题的复合体。两个形态分化但重叠的亚种已被描述。我们对来自北方半球的样本进行了形态测量和分子分析，以测试亚种之间的表型和系统发育分化。虽然这两个物种的实地采集可以在统计上区分形态，有很大的重叠。基因组水平的分子数据并不表明S.大雄海峡majus和ssp. norvegicum，包括样品分配给两个类群同域网站。利用质体基因组的序列数据推断异源多倍体S. majus。我们的结果支持了S. annulatum为父本，S. cuspidatum是母本。我们的结论是，它们之间的形态差异要么是对生境异质性的可塑性反应，要么是在单个分类群内分离的遗传变异。
Abstract. Species delimitation is problematic in many plant groups and among the mosses, Sphagnum is one of the more contentious genera because of high levels of morphological variation. The allopolyploid species, Sphagnum majus, comprises one such problematic complex. Two morphologically differentiated but overlapping subspecies have been described. We conducted morphometric and molecular analyses with samples from around the Northern Hemisphere to test for phenotypic and phylogenetic differentiation between the subspecies. Although field collections of the two species can be statistically differentiated morphologically, there is substantial overlap. Genome-scale molecular data do not suggest any differentiation between S. majus ssp. majus and ssp. norvegicum, including samples assigned to the two taxa from sympatric sites. Sequence data from the plastid genome were employed to infer parentage of allopolyploid S. majus. Our results support the hypothesis that S. annulatum is the paternal parent and S. cuspidatum is the maternal parent. We conclude that the morphological differences between them are either plastic responses to habitat heterogeneity or segregating genetic variation within a single taxon. Formal taxonomic recognition of two taxa is not supported by our molecular data.
影响因子：
3.3
作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
影响因子：
10.7
作者：
Hoang DT;Chernomor O;von Haeseler A;Minh BQ;Vinh LS
通讯作者：
Vinh LS