作物学报2011，Vol.37Issue(8)：1324-1332,9.DOI:10.3724/SP.J.1006.2011.01324
江苏省中部地区杂草稻遗传多样性及其起源分析
Genetic Diversity and Origin of Weedy Rice in Central Region of Jiangsu Province, China
摘要
Abstract
The previous investigations on occurrence and harmfulness of weedy rice in Jiangsu province showed the province is one of the most serious infestations in China, especially in the central region of Jiangsu province. Hence, in the paper, 33 pairs of co-dominant SSR makers were used to analyse 11 weedy rice populations in central region and other samples in northern and southern regions of this province. Our main objectives were to reveal genetic diversity and analyse the origin of weedy rice. The result showed that the genetic diversity of the 11 populations in central regions of Jiangsu province is He=0.1661, / =0.2872, percentage of polymorphic loci P=87.88%; average number of alleles Na=2.1515; effective number of alleles Ne=1.2&87. Among all of 11 populations, the populations collected from Taizhou city had the maximum value of genetic diversity while those from Nan-tong had the minimum one. Genetic differentiation among regions (1%) was significantly less than among populations (39%) and within populations (60%). UPGMA cluster analysis and principle component analysis (PCA) showed that most weedy rice populations were indica in central and southern regions of Jiangsu province and a few of japonica in northern regions in the province. All of weedy rice biotypes in central and southern regions did not related with cultivated rice while related with currently-cultivated hybrid indica rice which was ever planted before. Hence, our research results relatively supported the atavistic hypothesis that weedy rice in Jiangsu probably originated from cultivated rice and varieties (accessions) through gene recombination or reverse mutation which produce wild traits. However, the japonica weedy rice in northern regions might be the offspring of the hybrid between currently-cultivated rice and wild rice Ludao.关键词
杂草稻/分子标记/遗传多样性:来源/微卫星标记Key words
Weedy rice/ Molecular marker/ Genetic diversity/ Origin/ SSR引用本文复制引用
邵菁,戴伟民,张连举,宋小玲,强胜..江苏省中部地区杂草稻遗传多样性及其起源分析[J].作物学报,2011,37(8):1324-1332,9.基金项目
本研究由国家重点基础研究发展计划(973计划)项目(2007CB109202),国家转基因生物新品种培育科技重大专项(2008ZX08011,2009ZX08012-020B)和国家自然科学基金项目(30800604)资助. （973计划）
