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作者	单位
胡文静，朱冬梅，别同德，陆成彬，高德荣	（1.江苏里下河地区农业科学研究所/农业农村部长江中下游小麦生物学与遗传育种重点实验室，江苏扬州 225007； 2.扬州大学/江苏省粮食作物现代产业技术协同创新中心，江苏扬州 225009；3.河南农业大学/河南粮食作物协同创新中心，河南郑州 450002； 4.长江大学农学院，湖北荆州434023 ）

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中文摘要:

为给选育籽粒灌浆快、粒重高的小麦新品种提供材料与技术支撑，以扬麦16、镇麦168、扬麦20和扬麦22为亲本构建获得的158个RIL群体为材料，利用小麦15K SNP芯片构建遗传连锁图谱，对小麦籽粒灌浆速率相关性状进行QTL定位。结果表明，应用完备区间作图法共检测到11个QTL，其中检测到5个与灌浆速率相关的新的QTL，分别位于3AL、4DL(2)、6AL和 7AL上，可解释3.4%~9.3%的表型变异；检测到3个与千粒重相关的QTL，分别位于4AL（2）和4DS上，可解释3.9%~9.2%的表型变异；首次检测到3个与籽粒灌浆持续时间相关的QTL，分别位于3AL和4DL(2)上，可解释2.7%~7.5%的表型变异。扬麦16提供与灌浆速率和千粒重相关QTL的增效基因，累加了定位到的全部籽粒灌浆快和粒重高的位点；扬麦22提供与籽粒灌浆持续时间相关QTL的增效基因。扬麦16和扬麦22可用作选育早熟、大粒小麦新品种的亲本材料。

英文摘要:

To study the genetic mechanism and dynamic QTLs for grain-filling rate related traits of Yangmai 16, the four-way RIL population constructed with Yangmai 16 (YM16), Zhenmai 168 (ZM168), Yangmai 20 (YM20) and Yangmai 22 (YM22) as parents was genotyped with wheat 15K SNP array to identify the QTL associated with grain-filling rate related traits. A total of 11 QTLs were detected by ICIM (inclusive composite interval mapping).5 new QTLs associated with grain-filling rate were detected on 3AL, 4DL(2), 6AL and 7AL chromosomes, explaining the phenotypic variation ranging from 3.4% to 9.3%; 3 QTLs associated with grain weight were detected on 4AL(2) and 4DS chromosomes, explaining the phenotypic variation ranging from 3.9% to 9.2%;3 firstly reported QTLs associated with grain-filling period were detected on 3AL and 4DL(2), explaining the phenotypic variation ranging from 2.7% to 7.5%. YM16 contributed the favourable gene to all grain-filling rate and grain weight QTLs , and YM22 contributed the favourable gene to all grain-filling period QTLs. Moreover, YM16 was the cultivar responsible for all fast grain-filling and high grain weight QTLs detected.YM16 and YM22 can be used as parents materials for breeding new varieties of early maturing and large-grain wheat.

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