Variation in therbcL sequence ofStegnogramma pozoi subsp.mollissima (Thelypteridaceae) in Japan
Variation in therbcL sequence ofStegnogramma pozoi subsp.mollissima (Thelypteridaceae) in Japan
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日本Stegnogramma pozoi subsp.mollissima (Thelypteridaceae)的rbcL序列变异
DOI：
10.1007/bf02507791
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发表时间：
1998
影响因子：
2.8
通讯作者：
N. Murakami
中科院分区：
文献类型：
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作者：
Y. Yatabe;M. Takamiya;N. Murakami
狭带蕨伊瓦茨（subsp.mollissima（Fischer ex Kunze）K.伊瓦茨是日本最常见的蕨类植物之一，地理分布和栖息地范围非常广泛。我们检测了therbcL基因的亚种内变异，发现亚种内有三种类型（热海-1、热海-2和立山型）。热海-1和2型共有3个同源核碱基，地理分布混杂。因此，我们认为它们具有种内变异。相反，立山型与热海型相比有4-5个不同的核苷酸，并显示出更北方的分布。立山型的叶形态不同于热海型，虽然立山型的叶形状变化很大，在某些情况下与其他类型重叠。蕨类植物由于缺乏复杂的生殖器官，具有系统重要性的形态特征比显花植物少。可以合理地预期，仅基于叶片形态的蕨类植物物种识别可以通过分子特征进行微调。在therbcL序列的变化可能是有用的，作为一个重要的生物单位的指示。
Stegnogramma pozoi(Lagasca) K. Iwats. subsp.mollissima(Fischer ex Kunze) K. Iwats. is one of the most common ferns in Japan with a very broad geographical distribution and habitat ranges. We examined the intrasubspecific variation of therbcLgene, and found three types in the subspecies (Atami-1, Atami-2, and Tateyama types). The Atami-1 and 2 types shared three apomorphic nucleotides and their geographical distribution is intermingled. Thus, we considered them to have intraspecific variation. In contrast, the Tateyama type had 4–5 different nucleotides than the Atami types, and showed a more northern distribution. Leaf morphology of the Tateyama type is distinct from that of the Atami types, though the leaf shape in Tateyama type varies considerably and in some cases overlaps with other types. Ferns have fewer morphological features that are systematically significant than flowering plants because they lack complex reproductive organ. It is reasonable to expect that species recognition of ferns based only on leaf morphology can be fine tuned by molecular features. Variation in therbcLsequences might be useful as an indication of significant biological units.