摘要
以3个海岛棉品种和5个陆地棉品种配制的23个正反交组合的四个分离群体(F1、F2、BC1和BC2)为材料,以中等致病力的安阳菌系接种,研究陆地棉和海岛棉黄萎病抗性的遗传规律。结果表明,海岛棉品种间杂交,F2和BC2抗病和感病单株的分离比例均符合3∶1和1∶1,其黄萎病抗性是由一个显性基因控制;陆地棉品种间F2和BC2的抗病和感病单株的分离比例也均符合3∶1和1∶1,其黄萎病抗性也是由一个显性基因控制。用海岛棉抗病品种与陆地棉抗病品种进行种间杂交,其F2和BC2的抗病株均在95%以上,而用海岛棉抗病品种与陆地棉感病品种进行杂交,其F2和BC2抗病株和感病株的分离比例符合3∶1和1∶1,表明海岛棉和陆地棉的黄萎病抗病基因可能位于同一基因位点。
Three cultivars of Gossypium barbadense and five upland cotton (G. hirsutum) cultivars were used as host materials, and Verticillium dahliae Anyang strain, the intermediate virulent, had been used as the pathogenic fungus in the experiment to study the inheritance of Verticillium dahliae resistance of G.barbadense and G.hirsutum. The experimental results reviewed that the Verticillium wilt resistance in G. barbadense was a quality genetic trait, controlled by a single dominant gene, with the resistant plants to sensitivity ones in F2 population of 3∶1 and 1∶1 in BC1 population. The Verticillium wilt resistance in G.hirsutum was a quality genetic trait as well, and the resistant plants to sensitivity ones in F2 population was 3∶1 and those in BC1 population was 1∶1. For the interspecific hybrids between G.hirsutum and G.barbadense, about 95% of F1 and BC2 plants that derived from resistant species were resistant, while those derived from resistant G.barbadense and sensitivity upland cotton was following the Mendel's law, which indicated that the gene or genes controlled the resistance to Verticillium wilt in G.barbadense and G.hirsutum might be in same locus or loci.
出处
《棉花学报》
CSCD
北大核心
2003年第1期3-7,共5页
Cotton Science
基金
国家自然科学基金资助项目(39970467
39830240)
