Analysis of Vietnamese rice germplasm provides an insight into Japonica rice differentiation
Analysis of Vietnamese rice germplasm provides an insight into Japonica rice differentiation
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DOI：
10.1111/j.1439-0523.2003.00908.x
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发表时间：
2003-12-01
期刊：
影响因子：
2
通讯作者：
Nagamine, T
中科院分区：
文献类型：
--
作者：
Fukuoka, S;Alpatyeva, NV;Nagamine, T
利用DNA标记、形态和生理性状分析了亚洲栽培稻遗传多样性中心的越南北方水稻地方品种间的遗传分化，以了解亚洲水稻的遗传分化。基于核RFLP数据的主坐标分析将越南水稻品种分为A、B和C三个类群。叶绿体DNA变异将籼稻品种A与粳稻品种B和粳稻品种C区分开来。籼粳和温粳分化的生理特征表明，A、B类群分别是典型的籼、粳品种，而C类群的生理特征明显不同于其他两类群。这表明，B和C组之间的遗传差异代表了一个新的方面的遗传变异，以前没有在粳稻报道。C组和B组分别对应于高地和低地稻。8个标记位点与粳稻的高低分化相关。突出显示的染色体区域可能是在不同培养条件下的栽培历史中选择的，因此含有与适应有关的基因。
Genetic differentiation among landraces of rice in northern Vietnam that lie in the centre of genetic diversity of Asian cultivated rice was analysed using DNA markers, and morphological and physiological traits to obtain an insight into the genetic differentiation of Asian rice. Principle coordinate analysis, based on nuclear RFLP data, divided Vietnamese rice varieties into three groups, designated A, B and C. Chloroplast DNA variation discriminated group A, which corresponded to the Indica rice varieties, from both groups B and C, which corresponded to the Japonica rice varieties. Physiological characteristics for Indica-Japonica and tropical-temperate Japonica discrimination suggested groups A and B consisted of typical Indica and Japonica varieties, respectively, while the characteristics of group C were distinct from those of the other two groups. This suggests that the genetic differences between groups B and C represent a new aspect of genetic variation that has not been previously reported in Japonica rice. Groups C and B corresponded with upland and lowland rice, respectively. Eight marker loci were associated with upland-lowland differentiation in Japonica rice. Highlighted chromosomal regions might have been selected during the history of cultivation under different cultural conditions, and thus contain genes related to adaptation.