海稻86芒性状特点及遗传分析  

The Characteristics and Genetic Analysis of Awn in Haidao86

作　　者：吕品苍 王维[1,2] 屈天歌 贺文婷 刘勇涛 张献华 何玉池[1] 宋兆建[1] 蔡得田[1,2] 

机构地区：[1]湖北大学生命科学学院,湖北武汉 [2]武汉多倍体生物科技有限公司,湖北武汉

出　　处：《植物学研究》2019年第3期222-230,共9页Botanical Research

基　　金：本研究由1)国家自然科学基金项目(31571639);2)武汉市品牌农业发展计划项目资助。

摘　　要：海水稻的研究和利用对盐碱地的开发使用具有重要意义。海水稻原始材料海稻86具有长芒,但芒在生产中是不利性状。为了解海稻86芒的特点及遗传规律,本研究利用海稻86及本实验室发现的海稻86无芒突变体为材料,通过有性杂交获得二者的正、反交杂种,对杂种及亲本的主要农艺性状、芒的特点进行了详细比较,通过F1的性状表现及F2群体的分离情况,分析了芒的遗传方式。结果表明,杂种及亲本在主要农艺性状上无明显差异;在芒性状表现上,海稻86为全芒型,而正反、交杂种均表现为顶芒型;但不论全芒型还是顶芒型,芒的分布都具有一定的规律性。F2群体分离出全芒型、顶芒型和无芒型3种表型,X2测验结果符合预期1:2:1分离比。说明海稻86芒的性状由1对核基因控制,且为不完全显性。研究结果为海水稻芒基因的定位、克隆和功能分析奠定了基础。The research and utilization of seawater rice are of great significance to the development of sa-line-alkali land.Haidao86,the original material of seawater rice,has long awn,but awn is an un-favorable characteristic during harvest and processing.In order to understand the characteristics and inheritance of awn in Haidao86,Haidao86 and its awnless mutant that was found by our lab were used to make reciprocal hybrids.Then,the main agronomic traits and awn characteristics of hybrids and parents were compared in detail.The genetic pattern of awn was analyzed through the performance of F1 and the segregation of F2 population.The results showed that there was no significant difference in main agronomic traits between hybrids and their parents.In the performance of awn traits,Haidao86 was full awn type,while reciprocal hybrids were both top awn type.The distribution characteristics of full awn and top awn were summarized.Furthermore,three phenotypes,full awn,top awn and awnless,were segregated in F2 population.The segregation ratio was 1:2:1 and was confirmed by chi-square test.These indicated that the awn character of Haidao86 was controlled by one pair of nuclear gene that showed incomplete dominance.The results laid a foundation for mapping,cloning and function analysis of awn gene in Haidao86.

关 键 词：海稻86 芒 无芒突变 杂交 遗传分析 

分 类 号：S5[农业科学—作物学]