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Molecular phylogenetics of the Australian acacias of subg. Phyllodineae (Fabaceae : Mimosoideae) based on the trnK intron

机译:subg的澳大利亚相思的分子系统发育。基于trnK内含子的毛竹科(Fabaceae:Mimosoideae)

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摘要

With over 960 species, Acacia is the largest genus of plants in Australia with all but nine of these species classified as subgenus Phyllodineae. DNA sequences for the chloroplast trnK region were sequenced for over 100 species to test sectional classification and survey species relationships within this subgenus. Only one of the seven recognised sections was found to be monophyletic; however, the close relationship of sect. Botrycephalae to certain racemose, uninerved species of sect. Phyllodineae is confirmed. Support is found for an expanded version of Vassal's Pulchelloidea, with the addition of sect. Lycopodiifoliae and several members of sect. Phyllodineae. These species, while morphologically distinct in adult foliage, possess similar seedling characteristics. The multinerved species are unresolved, indicating a rapid morphological radiation with little chloroplast sequence divergence among these species. The low levels of sequence divergence, large numbers of morphological species groups and the adaptive radiation of the group are discussed.
机译:金合欢属有超过960种,是澳大利亚最大的植物属,除九种以外,其余全部都归类为毛竹亚科。叶绿体trnK区的DNA序列已对100多个物种进行了测序,以测试该亚属中的区域分类和调查物种之间的关系。发现七个公认的部分中只有一个是单系的。但是,宗派的密切关系。头孢菌属为某些消旋体,未受精的种。确认了毛yl科。找到了对Vassal的Pulchelloidea的扩展版本以及其他教派的支持。番茄科和几个教派成员。竹科。这些物种虽然在成年叶片中形态上不同,但具有相似的幼苗特征。多神经种尚未解析,表明这些物种之间的叶绿体序列差异很小,形态学辐射很快。讨论了低水平的序列分歧,大量的形态种群和该群的适应性辐射。

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