白粒小麦品种(系)穗发芽抗性机制分析  

Analysis on the Mechanism of Pre-harvest Sprouting Resistance in White-grain Wheat

作　　者：苗西磊[1] 王德森[1] 夏兰芹[1] 张运宏[1] 王忠伟[1] 何中虎[1,2] 陈新民[1] 

机构地区：[1]中国农业科学院作物科学研究所,北京100081 [2]CIMMYT中国办事处,北京100081

出　　处：《麦类作物学报》2011年第4期741-746,共6页Journal of Triticeae Crops

基　　金：国家"973"计划项目(2009CB118301);农业科技支撑计划项目(2006BAD01A02)

摘　　要：为了解小麦穗发芽抗性机制,应用与抗穗发芽有关的功能标记Vp1B3、Vp1-b2和Dorm-1并结合整穗发芽、籽粒发芽、籽粒+芒、籽粒+穗轴、籽粒+颖壳和籽粒+芒+穗轴+颖壳共6种发芽试验处理,分析了11个小麦品种(系)的穗发芽抗性机制。结果表明,红粒抗穗发芽对照京9428和京冬8号的抗性受粒色、Vp-1Bc、颖壳或颖壳抑制物控制;9个白粒品种(系)穗发芽抗性均不同程度的受芒和颖壳或它们的抑制物控制;强抗穗发芽品系CA0431的抗性与Vp1B3、Dorm-1和粒色无关,而与其他遗传因素有关;强抗穗发芽品系山东046432属于由Vp-1Bc和Dorm-1控制的基因型;中抗穗发芽品种矮抗58的抗性与穗轴有关;Vp-1Bb基因对CA9550-2的穗发芽作用有待进一步证实;芒和颖壳或它们的抑制物对白粒中感穗发芽品系CA9640、CA0459、CA0493和白粒高感穗发芽品系山东928802和CA0306的穗发芽均有一定的抑制作用,但Vp-1Bb基因型与山东928802和Vp-1Bc基因型与CA0306的穗发芽并无相关。Understanding the mechanism of pre-harvest sprouting（PHS） is very important to breed wheat cultivars with PHS resistance.The functional molecular markers Vp1B3,Vp1-b2 and Dorm-1,combining with the germination test of spike,seed,seed ＋ awn,seed ＋ spike-stalk,seed ＋ glumes,and seed ＋ awn ＋ spike-stalk ＋ glumes,were used in this study to find out the mechanism of PHS resistance of the 11 winter wheat cultivars（lines）.The results showed that the resistance of PHS in two red-grain check cultivars Jing 9428 and Jingdong 8 was controlled by red-color and Vp-1Bc as well as glumes or their inhibitors.Nine white-grain cultivars（lines） had not only the common mechanisms of resistance called awn and glumes or their inhibitory substances,but also some different mechanisms.There were no relationships among PHS resistance of high tolerant line CA0431 with Vp1B,Dorm-1 and grain color,while its resistance was controlled by other genetic factors.High resistance of Shandong 046432 was due to Vp-1Bc and Dorm-1.Spike-stalk provided the medium resistance to cultivar Aikang 58.The effect of Vp-1Bb gene on the resistance of CA9550-2 needed further investigation.Awn and glumes or their inhibitory substances offered some resistance to the three medium susceptible lines CA9640,CA0459 and CA0493,and two high susceptible lines Shandong 928802 and CA0306.However,the genotype Vp-1Bb of Shandong 928802 and genotype Vp-1Bc of CA0306 were not associated with the PHS resistance.

关 键 词：小麦 粒色 穗发芽 抗性机制 分子标记 Vp1B3、Vp1-b2和Dorm-1 

分 类 号：S512.1[农业科学—作物学] S311