基于染色体片段导人系发掘抗玉米丝黑穗病主效QTL
文献类型: 中文期刊
作者: 吉海莲;翁建峰;吕香玲;王振华;谢传晓;张世煌;李新海
作者机构:
关键词: 玉米;玉米丝黑穗病;染色体片段导入系;连锁不平衡分析;数量性状基因位点;Maize ; Head smut ; Introgression line ; Linkage disequilibrium analysis ; Quantitative trait loci
期刊名称:植物遗传资源学报
ISSN: 1672-1810
年卷期: 2012 年 13 卷 002 期
页码: 244-251
收录情况: 北大核心 ; CSCD
摘要: 选用抗玉米丝黑穗病自交系Mo17和SH15为供体,与受体感病自交系黄早四和昌7-2构建回交群体(BC3F1\BC4F2),通过田间人工接种玉米丝黑穗病原菌鉴定抗病性表现,评价群体抗病性。研究结果显示黄早四X(黄早四XMol7)BC。F:群体发病率明显高于BC3F1群体;两个BC4F2黄早四×(黄早四×M017)和昌7—2×(昌7—2×SH15)群体的发病率差异较大。采用SSR标记分析抗病株的供体染色体导入片段,发现随着回交次数的增多,导入片段数量减少,但不同回交群体中供体导入片段数目明显不同.通过连锁不平衡分析,在染色体2.09和3.04区段发掘和验证2个抗玉米丝黑穗病主效QTL,连锁标记分别为UInc2077和phi053或bnlg1965。本文研究结果为抗丝黑穗病基因精细定位和分子聚合育种提供了信息和材料。
分类号: Q343.2
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