Diversity in phenotypic profiles in landrace populations of Vietnamese rice: a case study of agronomic characters for conserving crop genetic diversity on farm
Diversity in phenotypic profiles in landrace populations of Vietnamese rice: a case study of agronomic characters for conserving crop genetic diversity on farm
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DOI：
10.1007/s10722-004-4635-1
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发表时间：
2006-06-01
影响因子：
2
通讯作者：
Okuno, K
中科院分区：
文献类型：
--
作者：
Fukuoka, S;Suu, TD;Okuno, K
香稻主要农艺性状的表型变异以阐明水稻地方品种群体的遗传多样性。在越南红河三角洲的南丁省，对13个种群在农地和试验田进行了研究。群体间农艺性状差异不大，包括含有不同品种的群体。群体间几个性状的频率分布差异表明，群体间的多样性程度不同，即使在具有相同品种名称的群体之间也是如此。农民田和试验田的表型谱不同，说明了它们之间的环境差异。Myloc地区栽培的一个品种在试验田中表现出与海州地区其他品种不同的表型特征。由于每个农场的表型差异很小，可能是由于农民的遗传漂移和选择，因此在农场，保护水稻地方品种被认为是减少表型多样性的压力。这项研究表明，针对不同表型特征的几个农场有助于保护水稻地方品种的区域遗传多样性。
Phenotypic variation of agronomic characters in aromatic rice (Oryza sativa L.) was analyzed in order to elucidate the genetic diversity of the populations of rice landraces. Thirteen populations in Namdinh province, in the Red River Delta of Vietnam, were studied in both of farmers fields and an experimental field. Only small differences were found in agronomic characters among the populations, including populations containing different varieties. Variations among the populations in the frequency distributions of several characters suggested different degrees of diversity among the populations even among populations with the same variety name. The phenotypic profiles of farmers fields were different from those in an experimental field suggesting the environmental differences between them. One variety cultivated in the Myloc district had different phenotypic characters from the other varieties in the Haihau district more clearly in the experimental field. Since the small phenotypic variation in each of farm might be due to the genetic drift and selection by the farmers, on farm conservation of the landraces of rice is considered to be under a force to decrease phenotypic diversity. The present study suggests that the targeting several farms with different phenotypic profiles contribute to the conservation of regional genetic diversity of the landraces of rice.