Mechanisms and control of rapid genomic changes in flax
Mechanisms and control of rapid genomic changes in flax
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DOI：
10.1093/aob/mci013
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发表时间：
2005-01-01
期刊：
影响因子：
4.2
通讯作者：
Cullis, CA
中科院分区：
文献类型：
--
作者：
Cullis, CA
背景和目的当植物在特定的环境条件下生长时，某些品种的亚麻（Linum usitissimum）的核DNA可以在单个世代内发生变化。这篇综述详细介绍了基因组变异已被确定，并与这种环境responsibility.Conclusions的变化发生在整个频谱的序列重复，并已被证明发生在高度重复，中间重复和低拷贝数的序列。尽管这种变异已被证明分布在整个基因组中，但它并不是随机发生的，因为类似的分子事件已被证明重复发生。核内两个不稳定区域的变化。核糖体RNA基因和位点特异性插入事件已经显示在营养生长期内和相对较短的生长期内发生。上述总核DNA的逐渐变化，必须是在开花前的整个或大部分生长期内发生变化的机会积累的结果。在许多其他亚麻和亚麻籽品种以及亚麻的野生祖先中也观察到了这些快速发生的基因组事件所导致的多态性。(C)2005年，公司成立。
Background and aims The nuclear DNA of certain varieties of flax (Linum usitissimum) can vary within a single generation when the plants are grown under specific environmental conditions. This review details the genomic variations that have been identified and associated with this environmental response.Conclusions The variation occurs across the whole spectrum of sequence repetition and has been shown to occur in the highly repeated, middle repetitive and low copy number sequences. Although the variation has been shown to be spread throughout the genome it does not occur at random, as similar molecular events haw been shown to occur repeatedly. The changes in two labile regions in the nucleus. the ribosomal RNA genes and a site-Specific insertion event, have been shown to occur within the period of vegetative growth and over a relatively short period of that growth. The gradual changes in total nuclear DNA that has been described would then need to have arisen through an accumulation of chances accumulation of changes occuring over the whole, or most of the, period of growth prior to flowering. The polymorphism that result from these rapidly occurring genomic events have also been observed in many other flax and linseed varieties as well as in the wild progenitors of flax. (C) 2005 Annals of Botany Company.