Laying the cytotaxonomic foundations of a new model grass, Brachypodium distachyon (L.) Beauv.
Laying the cytotaxonomic foundations of a new model grass, Brachypodium distachyon (L.) Beauv.
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DOI：
10.1023/b:chro.0000034130.35983.99
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发表时间：
2004-01-01
影响因子：
2.6
通讯作者：
Jenkins, G
中科院分区：
文献类型：
--
作者：
Hasterok, R;Draper, J;Jenkins, G
二穗短柄草（Brachypodium distachyon）是一种普遍存在的温带禾本科物种，其被开发和利用作为水稻的替代模式，以获得不太容易处理的亲戚（如小麦）的基因组的重要同线区域。作为这一举措的一部分，本文首次介绍了该物种的多倍体系列成员的细胞分类学，并挑战了该系列进化简单的染色体加倍的假设。利用基因组DNA探针和rDNA标记的原位杂交揭示了几个多倍体生态型的杂交起源，并揭示了该物种及其近亲的复杂进化。
Brachypodium distachyon is a ubiquitous, temperate grass species which is being developed and exploited as an alternative model to rice, in order to gain access to important syntenic regions of the genomes of less tractable relatives such as wheat. As part of this initiative, this paper describes for the first time the cytotaxonomy of members of the polyploid series of this species, and challenges the assumption that the series evolved simply by chromosome doubling. In situ hybridization using genomic DNA probes and rDNA markers uncovers a hybrid origin of several of the polyploid ecotypes, and sheds light upon the complex evolution of this species and its close relatives.