中国大麦矮秆种质资源的基因分析Ⅱ．矮秆基因的染色体定位

根据连锁遗传原理，利用全套染色体形态性状状标记系，对２０份中国大麦筹秆南资源的矮秆基因，进行了染色体定位，结果表明，１５份单基因矮杆中，有１份其矮秆基因与宽护颖基因w连锁，位于２（２Ｈ）染色体短臂上；１０份的矮秆基因与uz基因等等位，由３（３Ｈ）长臂携带；４份的矮秆基因与钩芒K ,锁位于４（４Ｈ）长臂上，５份双基因矮秆中，有３份的筹秆基因分别位于２（２Ｈ）短臂和４（４Ｈ）长 臂上；１份的筹秆基因各由其３（３Ｈ）和４（４Ｈ）长臂携带；其余１份的两对矮秆基因，１对与uz基因等位，由于３（３Ｈ）长臂携带，另１对则与宽护颖基因w连锁，位于２（２Ｈ）短臂之上。

Gene Analysis of Chinese Barley Dwarf Germplasm Resources II. Location of the Dwarf Genes on Chromosomes

Twenty dwarf sources of Chinese barley were crossed to a set ofmarker stocks. Based on the linkage tests with the marker traits and genes, the dwarfing genes in Chinese dwarf barley were located on different chromosomes. Fifteen of the 20 dwarf sources were recessive mono杔ocus. Among them, BQK carried a pair of dwarfing genes on its short arms of 2(2H) chromosome, linking to the wide outer glume gene w; HZA 77 etc. 10 dwarf sources held dwarfing genes allelic to semi朾rachytic gene uz on their long arms of 3(3H) chromosomes respectively; 91G318, 91D27, 11012.2 and JJ had dwarfing genes on their long arms of 4(4H) chromosomes, which linked with the hooded awn gene K. The remaining five dwarf sources were two杔ocus. Two recessive loci were found to be on 2HS and 4HL respectively in DQQK, ZLL and ZLLQK. A pair of incomplete dominant genes were located on 2HS, and another pair of recessive ones located on 3HL in 1974E. Two recessive loci of Yan 66 were separately located on its 3HL and 4HL.