【目的】分析24份金花茶组植物种质资源的遗传多样性和亲缘关系,为金花茶组植物种质资源的鉴定和杂交育种提供参考依据。【方法】以毛瓣金花茶和夏石金花茶DNA样品进行引物筛选,从50条iPBS(Inter primer binding site)引物中筛选出稳定...【目的】分析24份金花茶组植物种质资源的遗传多样性和亲缘关系,为金花茶组植物种质资源的鉴定和杂交育种提供参考依据。【方法】以毛瓣金花茶和夏石金花茶DNA样品进行引物筛选,从50条iPBS(Inter primer binding site)引物中筛选出稳定、清晰的引物对所有供试材料进行PCR扩增,利用非加权平均距离法(UPGMA)构建系统发育进化树,采用iPBS分子标记技术分析其遗传多样性。【结果】从50条iPBS引物中筛选出10条多态性高、重复性好的引物,在24份金花茶组植物种质资源中共扩增出280条条带,平均每条引物扩增条带数为28条,多态性条带268条,多态性比率为92.68%,平均等位基因数(Na)、有效等位基因数(Ne)、Nei's基因多样性指数(H)和Shannon多样性信息指数(I)分别为1.9571、1.3544、0.2332和0.3767,表明金花茶组植物种质资源具有丰富的遗传多样性;24份金花茶组植物种质资源的遗传相似系数为0.543~0.836,在遗传相似系数0.680处,可将24份金花茶组植物种质资源聚为3组。【结论】iPBS分子标记多态性高,重复性好,便于操作,能有效进行金花茶组植物种质资源的遗传多样性分析,可供金花茶种质资源的品种鉴定、亲缘关系分析和分子辅助育种参考应用。展开更多
Resistance to rice gall midge in rice germplasm 91-1A2 was identified and genetically analyzed F1s of rice population were derived from 91-1A2 which crossed with rice materials Jinggui, TN1, W1263 (Gm1), IET2911 (...Resistance to rice gall midge in rice germplasm 91-1A2 was identified and genetically analyzed F1s of rice population were derived from 91-1A2 which crossed with rice materials Jinggui, TN1, W1263 (Gm1), IET2911 (Gm2), BG404-1 (gm3), OB677 (Gm4), ARC5984 (Gm5) and Duokang 1 (Gm6) as a male parent. The resistance of all parental lines and F1, BC1F1 and F2 populations to rice gall midge was identified. The results showed that 91-1A2 and all F1s were resistant to Chinese rice gall midge biotype IV. The segregation ratio of resistant plants to susceptible ones in BC1F1 and F2 were accorded with 1:3 and 9:7 rules by X2 test, suggesting that the resistance of 91-1A2 to Chinese rice gall midge biotype IV was controlled by two dominant genes which were new resistance genes, non-allelic to the known rice gall midge resistance genes.展开更多
文摘【目的】分析24份金花茶组植物种质资源的遗传多样性和亲缘关系,为金花茶组植物种质资源的鉴定和杂交育种提供参考依据。【方法】以毛瓣金花茶和夏石金花茶DNA样品进行引物筛选,从50条iPBS(Inter primer binding site)引物中筛选出稳定、清晰的引物对所有供试材料进行PCR扩增,利用非加权平均距离法(UPGMA)构建系统发育进化树,采用iPBS分子标记技术分析其遗传多样性。【结果】从50条iPBS引物中筛选出10条多态性高、重复性好的引物,在24份金花茶组植物种质资源中共扩增出280条条带,平均每条引物扩增条带数为28条,多态性条带268条,多态性比率为92.68%,平均等位基因数(Na)、有效等位基因数(Ne)、Nei's基因多样性指数(H)和Shannon多样性信息指数(I)分别为1.9571、1.3544、0.2332和0.3767,表明金花茶组植物种质资源具有丰富的遗传多样性;24份金花茶组植物种质资源的遗传相似系数为0.543~0.836,在遗传相似系数0.680处,可将24份金花茶组植物种质资源聚为3组。【结论】iPBS分子标记多态性高,重复性好,便于操作,能有效进行金花茶组植物种质资源的遗传多样性分析,可供金花茶种质资源的品种鉴定、亲缘关系分析和分子辅助育种参考应用。
基金supported by the Natural Science Foundation of Guangxi Province (Grant No.0007015)Science Research and Technology Development Program of Guangxi Province (Grant Nos.0012027 and 9939006)Foundation of New Century Ten-Hundred-Thous and Talents of Guangxi,China (Grant No. 2003213)
文摘Resistance to rice gall midge in rice germplasm 91-1A2 was identified and genetically analyzed F1s of rice population were derived from 91-1A2 which crossed with rice materials Jinggui, TN1, W1263 (Gm1), IET2911 (Gm2), BG404-1 (gm3), OB677 (Gm4), ARC5984 (Gm5) and Duokang 1 (Gm6) as a male parent. The resistance of all parental lines and F1, BC1F1 and F2 populations to rice gall midge was identified. The results showed that 91-1A2 and all F1s were resistant to Chinese rice gall midge biotype IV. The segregation ratio of resistant plants to susceptible ones in BC1F1 and F2 were accorded with 1:3 and 9:7 rules by X2 test, suggesting that the resistance of 91-1A2 to Chinese rice gall midge biotype IV was controlled by two dominant genes which were new resistance genes, non-allelic to the known rice gall midge resistance genes.