Two Genomic Regions Contribute Disproportionately to Geographic Differentiation in Wild Barley
Two Genomic Regions Contribute Disproportionately to Geographic Differentiation in Wild Barley
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DOI：
10.1534/g3.114.010561
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发表时间：
2014-07-01
影响因子：
2.6
通讯作者：
Morrell, Peter L.
中科院分区：
文献类型：
--
作者：
Fang, Zhou;Gonzales, Ana M.;Morrell, Peter L.
自然种群的遗传分化是由地理距离以及自然生境内和自然生境之间减少迁徙的生态或物理特征驱动的。野生大麦的初级种群结构将扎格罗斯山脉东部和西部的种群区分开来。东部和西部群体之间的遗传分化在基因组上是不均匀的，在连锁群2H和5H上最大。这两个地区的遗传标记在初级群体之间的频率差异最大，并且具有分配给每个群体的最高信息量。以前的细胞学和遗传学研究表明，这些基因组区域存在染色体结构重排(倒位或易位)。环境关联分析表明，2H的温度和降水变量以及5H的降水变量都与环境关联。
Genetic differentiation in natural populations is driven by geographic distance and by ecological or physical features within and between natural habitats that reduce migration. The primary population structure in wild barley differentiates populations east and west of the Zagros Mountains. Genetic differentiation between eastern and western populations is uneven across the genome and is greatest on linkage groups 2H and 5H. Genetic markers in these two regions demonstrate the largest difference in frequency between the primary populations and have the highest informativeness for assignment to each population. Previous cytological and genetic studies suggest there are chromosomal structural rearrangements (inversions or translocations) in these genomic regions. Environmental association analyses identified an association with both temperature and precipitation variables on 2H and with precipitation variables on 5H.