小麦光温敏雄性不育系BS366抽穗期的QTL分析(英文)

QTL Mapping of Heading stage for Photoperiodthermo Sensitive Male Sterile Line BS366 in Wheat

[目的]对小麦光温敏不育系BS366的抽穗期进行QTL分析,为BS366的品种改良和标记辅助育种奠定基础。[方法]以小麦光温敏雄性不育系BS366和常规品种Baiyu149杂交得到的234个DH(doubled haploid)株系为材料,于2007～2008年分别种植于北京海淀和安徽阜南试验田,采用复合区间作图法,对抽穗期进行QTL分析。[结果]共检测到15个抽穗期QTL,在两地都检测到的QTL有8个,分别位于染色体1B、2A、2D、3B(2个)、6B(2个)和7B,单个QTL的贡献率为2.42%～10.98%。[结论]在1B染色体上新发现了一个抽穗期QTL,丰富了QTL资源。在两地都检测到的8个QTL,可用于小麦光温敏雄性不育系BS366抽穗期的改良和标记辅助育种。

[Objective]The study aimed to map QTLs（Quantitative trait loci）of heading stage for phtopeiod-thermo sensitive male sterile line BS366 in wheat.[Method] A population of 234 doubled haploid derived from the cross between BS366 and Baiyu149 was planted in Beijing and Funan in 2007,respectively.We used composite interval mapping（CIM）method to analyse the QTLs for heading stage.[Result]We detected 15 QTLs for heading stage.8 QTLs were detected in both Beijing and Funan,which were located on 1B,2A,2D,3B（2 loci）,6B（2 loci）and 7B.A single QTL accounted for 2.42%-10.98% of pheotypic varience.[Conclusion] Eight QTLs which were detected under two environments could be applied for marker-assisted breeding and improvement of BS366.The QTL on chromosome 1B was new for heading stage,which enriches the QTL resource.