摘要
根据连锁遗传原理,利用全套染色体形态性状标记系,对20份中国大麦矮秆种质资源的矮秆基因,进行了染色体定位。结果表明:15份单基因矮秆中,有1份其矮秆基因与宽护颖基因Z连锁,位于2(2H)染色体短臂上;10份的矮秆基因与uz基因等位,由3(3H)长臂携带;4份的矮秆基因与钩芒基因K连锁,位于4(4H)长臂上。5份双基因矮秆中,有3份的矮秆基因分别位于2(2H)短臂和4(4H)长臂上;1份的矮秆基因各由其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。
Twenty dwarf sources of Chinese barley were crossed to a set of marker 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-locus. Among them, BQK cAned a pair of dwarfing genes on its short anus of 2(2H) chromosome, linking to the wide outer glume gene w; HZA 77 etc. 10 dwarf scarces held dwarfing genes allelic to semi-brachytic 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-locus. 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.