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首页> 外文期刊>Flora >Taxonomic identity of Quercus coccifera L. in the Iberian Peninsula is maintained in spite of widespread hybridisation, as revealed by morphological, ISSR and ITS sequence data
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Taxonomic identity of Quercus coccifera L. in the Iberian Peninsula is maintained in spite of widespread hybridisation, as revealed by morphological, ISSR and ITS sequence data

机译：尽管形态，ISSR和ITS序列数据显示杂交广泛，但伊比利亚半岛栎的分类学特征得以保持

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摘要

Interspecific introgression is a well-known phenomenon in oaks whose ecological and evolutionary consequences, although relevant, are still unclear. We investigated molecular variation and any evidence for hybridisation in nine natural populations of kermes oak (Quercus coccifera L.) from the Iberian Peninsula. Additive patterns in 59 nrDNA ITS sequences revealed that hybrid individuals showing intermediate genotypes between kermes and holm (Q. ilex L.) oaks are very frequent, although intermediate morphotypes are uncommon. Bayesian analysis of ISSR fingerprinting patterns indicated extensive gene-flow among Q. coccifera populations and neighbouring Quercus taxa. Introgression appeared to be an active mechanism in the pair Q. coccifera-Q. ilex, but no conclusive evidence supporting hybridisation between Q. coccifera and other co-occurring Quercus species was found. The role of canalisation in the maintenance of stable morphological characters in the face of extensive introgression is discussed. (c) 2007 Elsevier GmbH. All rights reserved.
机译：种间渗入是橡树中的一种众所周知的现象，尽管其相关的生态和进化影响尚不清楚，但仍不清楚。我们调查了来自伊比利亚半岛的9个自然栎类（Quercus coccifera L.）天然种群中的分子变异和杂交的任何证据。在59种nrDNA ITS序列中的加性模式显示，尽管在中间形态型上并不常见，但在个体间，在角蛋白和霍尔姆（Q. ilex L.）橡树之间显示中间基因型的杂种个体非常频繁。贝叶斯对ISSR指纹图谱的分析表明球囊Q.种群和邻近的栎类群之间广泛的基因流。渗入似乎是Q. coccifera-Q对中的活跃机制。冬青属，但没有确凿的证据支持球墨茶和其他同时存在的栎属物种之间的杂交。面对广泛的渗入，讨论了渠化在维持稳定形态特征中的作用。 （c）2007 Elsevier GmbH。版权所有。

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