Diversity of Chromosomal Karyotypes in Maize and Its Relatives
Diversity of Chromosomal Karyotypes in Maize and Its Relatives
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DOI：
10.1159/000314342
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发表时间：
2010-01-01
影响因子：
1.7
通讯作者：
Birchler, J. A.
中科院分区：
文献类型：
--
作者：
Albert, P. S.;Gao, Z.;Birchler, J. A.
玉米在基因序列水平上是高度多样的物种。随着最近开发的方法来区分每一个的10对同源体根尖蔓延，广泛收集的玉米品系进行核型分析，作为一个参考的社会，并检查该物种的染色体特征谱。核心巢式关联作图祖先收集和多样性系的额外选择进行了检查。分析中包括常用的自交系。着丝粒4特异性重复序列和核糖体RNA位点是不变的。CentC着丝粒重复序列在任何特定染色体上的数量上都表现出广泛的差异。旋钮异染色质是高度可变的，在基因组中的许多位点的位置。最后，代表性的例子，从其他物种的玉米属（大刍草）进行了检查，这提供了信息的染色体特征的演变。版权所有（C）2010 S. Karger AG，巴塞尔
Maize is a highly diverse species on the gene sequence level. With the recent development of methods to distinguish each of the 10 pairs of homologues in somatic root tip spreads, a wide collection of maize lines was subjected to karyotype analysis to serve as a reference for the community and to examine the spectrum of chromosomal features in the species. The core nested association mapping progenitor collection and additional selections of diversity lines were examined. Commonly used inbred lines were included in the analysis. The centromere 4 specific repeat and ribosomal RNA loci were invariant. The CentC centromere repeat exhibited extensive differences in quantity on any particular chromosome across lines. Knob heterochromatin was highly variable with locations at many sites in the genome. Lastly, representative examples from other species in the genus Zea (teosintes) were examined, which provide information on the evolution of chromosomal features. Copyright (C) 2010 S. Karger AG, Basel