摘要
利用来自以色列Gitit的野生二粒小麦（编号：G18-16）与来自欧洲的四倍体栽培小麦Langdon（Ldn）杂交构建的重组自交系F6代152个家系,种植于黔中,进行了主穗重、主穗籽粒重、千粒重、籽粒长、宽和厚等数量性状基因位点（QTL）分析,共检测到16个与产量性状相关的QTL,LOD值为2.1~4.4,贡献率为7.4~39.4%。QTL在染色体上的分布分别为：1B染色体上有两个与主穗重有关;5A和7B上各有一个与主穗籽粒重有关;1A和4B上各有一个与千粒重有关;2A、3A、4B和5A上共有五个与籽粒长有关;5A和7A上三个与籽粒宽有关;5A上两个与籽粒厚有关。获得的QTL可用于分子辅助育种改良现代栽培小麦。
A mapping population consisting of 152 F6 recombinant inbred lines（RILs） derived from a cross between durum wheat cv.Langdon（Ldn） and wild emmer wheat accession G18-16 was used for QTL mapping of yield-related traits in the central region of Guizhou Province,China.G18-16 and Ldn originated from Gitit in Israel and Europe,respectively.A total of 16 QTL effects associated with six yield-related traits were detected,with a LOD score range of ca.2.1 to 4.4,and explaining ca.7.4 to 39.4% of the phenotypic variation.The identified QTLs included： two QTLs for main-spike weight,located on chromosome 1B（2 QTLs）;two QTLs for main-spike grain weight,located on chromosomes 5A and 7B,respectively;two QTLs for thousand-grain weight,located on chromosomes 1A and 4B,respectively;five QTLs for grain length,located on chromosomes 2A,3A,4B（2 QTLs） and 5A;three QTLs for grain width,located on chromosomes 5A（2 QTLs） and 7A;two QTLs for grain thickness,located on chromosome 5A（2 QTLs）.The identified QTLs could be useful in future marker-assisted selection programs,facilitating the use of wild alleles for yield enhancement in elite wheat cultivars.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2011年第2期163-171,共9页
Journal of Shandong Agricultural University：Natural Science Edition
基金
贵州省"十一五"重点攻关项目[黔科合NY(2006)3002F]
贵州省优秀青年科技人才培养计划(2006-2011)
关键词
野生二粒小麦
主穗重
主穗籽粒重
千粒重
籽粒长、宽、厚
数量性状基因位点(QTL)
Wild emmer wheat
Triticum dicoccoides
main-spike weight
main-spike grain weight
thousand-grain weight
grain length
width and thickness
quantitative trait locus（QTL）
