Morphological and molecular (RAPD) analyses confirm the hybrid origin of the diploid grassCalamagrostis longiseta var.longe-aristata (Gramineae)
Morphological and molecular (RAPD) analyses confirm the hybrid origin of the diploid grassCalamagrostis longiseta var.longe-aristata (Gramineae)
复制标题
形态学和分子 (RAPD) 分析证实了二倍体草 Calamagrostis longiseta var.longe-aristata（禾本科）的杂交起源
DOI：
10.1007/bf02835102
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发表时间：
2007
影响因子：
1.2
通讯作者：
M. Maki
中科院分区：
文献类型：
--
作者：
Kaku Saitou;T. Fukuda;J. Yokoyama;M. Maki
为了研究二倍体草Calamagrostis longisetavar.longe-aristata的杂交起源，我们对这个分类群及其假定的亲本分类群进行了形态测量和遗传分析。形态计量学分析表明，总的来说，C。longisetavar.longe-aristatais形态上介于C. longisetavar.longisetaandC. fauriei。以前的研究报道，一些杂种表现出超亲性状，但其他人没有;后者是C的情况。longisetavar.longe-aristata.它们的缺席可能是由于生态适应环境之间的假定的父母类群居住的中间，因此，越界字符没有被选中。然而，没有直接的证据，适应价值的字符在这项研究中，只有一小部分的所有字符可能负责适应的调查。关于C. longisetavar.longe-aristatais表明，它正处于杂交物种形成的早期阶段。随机扩增多态性DNA（RAPD）分析表明，C. longisetavar. longe-aristata. longe-aristata. longisetavar. longe-aristata. longisetavar. longe-aristata. longisetavar. longisetavar. longisetavar. longe-aristata. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetavar. longisetar. longisetar. longis. longisetavar. longis. longisetavar. longis. longisetar. longisetar. longisetar. longisetar. longis longesetavar.longe-aristatathan在其推定的亲本类群。所有这些研究结果都支持C. longisetavar.longe-aristatais为杂种起源，由C. longisetavar.longisetaandC. fauriei。
To examine the hybrid origin of the diploid grassCalamagrostis longisetavar.longe-aristata, we performed morphometric and genetic analyses of this taxon and its putative parental taxa. The morphometric analyses revealed that, in general,C. longisetavar.longe-aristatais morphologically intermediate betweenC. longisetavar.longisetaandC. fauriei. Previous studies have reported that some hybrids exhibit transgressive characters but others do not; the latter is the case forC. longisetavar.longe-aristata. Their absence may be due to the ecological adaptation to environments intermediate between those inhabited by the putative parental taxa, and therefore the transgressive characters have not been selected. Nevertheless, there is no direct evidence for adaptive value of the characters examined in this study and only a small part of all characters potentially responsible for adaptation was investigated. An alternative hypothesis about the absence of transgressive characters inC. longisetavar.longe-aristatais that it is at an early stage of hybrid speciation. Random amplified polymorphic DNA (RAPD) analyses showed that individuals ofC. longisetavar.longe-aristatawere placed in both of the clusters formed by each putative parental taxon. Greater genetic diversity was observed inC. longisetavar.longe-aristatathan in its putative parental taxa. All here reported findings support the scenario thatC. longisetavar.longe-aristatais of hybrid origin, having evolved fromC. longisetavar.longisetaandC. fauriei.