水稻穗部簇生突变体(Cl-dz)的遗传分析与初步定位

摘要

A clustered spikelets mutant (Cl-dz) controlled by single recessive gene was found in the progeny of a rice breeding material, its phenotype characteristic was that 2 or 3 spikelets cluster on the second stem in the shape of "W" Genetic analysis indicated that the trait was a recessive trait genetically controlled by single gene. The F2 mapping population was constructed by hybridization between mutant Cl-dz and G46. And the gene Cl-dz was mapped between SSR markers, RM6036 and RM1340 in chromosome 6 of rice- The genetic distance was 3. 6 cM and 7. 0 cM, respectively.%从水稻育种材料后代中获得1个受隐性单基因控制的簇生穗突变体(Cl-dz).其表型特征为:在二次枝梗顶端有2～3个小穗簇生在一起,呈“W”形态.遗传分析表明该性状是受单基因控制的隐性性状.利用突变体Cl-dz与保持系冈46杂交构建F2定位群体,将该基因定位在6号染色体的SSR标记RM6036与RM1340之间,遗传距离分别为3.6 cM和7.0 cM.