Inheritance Pattern of Two-line Hybrid Rice Resistance to False Smut  

两系杂交稻稻曲病抗性遗传研究（英文）

作　　者：唐善军 高杜娟 陈友德 李友荣 张世辉 赵正洪 

机构地区：[1]湖南省水稻研究所,湖南长沙410125

出　　处：《Agricultural Science & Technology》2014年第4期557-560,共4页农业科学与技术（英文版）

基　　金：Supported by Major Science and Technology Project of Hunan Province(2013FJ1008)~~

摘　　要：[Objective] The aim of this study was to explore the inheritance pattern of the resistance of two-line hybrid rice to false smut. [Method] A moderate susceptible TGMS line 33S as the female parent, was crossed with 30 susceptible restorer lines and 23 resistant restorer lines. Then false smut resistance of the hybrid F1 and parents were identified. [Result] All F1 of 33S crossed with 30 susceptible re- storer lines were susceptible to rice false smut. The F1 of 33S crossed with 23 re- sistant restorer lines showed dominant, incompletely dominant or recessive inheri- tance. Dominant and incompletely dominant inheritance accounted for 87.0%. The diseased panicle rate, disease index, average diseased grains per panicle, and the highest diseased grains per panicle of F1 shared highly significant positive correla- tions with corresponding indicators of restorer lines. [Conclusion] This study provides references for genetic improvement of two-line hybrid rice.[目的]了解两系杂交稻稻曲病抗性遗传特征。[方法]该研究选用中感稻曲病两系不育系33s和30个感病恢复系及23个抗病恢复系配组,分别鉴定了杂交组合和对应亲本的抗性水平。[结果]30个感病恢复系所配组合均感病;23个抗病恢复系所配组合抗性遗传有显性、不完全显性和隐性,其中显性和不完全显性遗传占87.0%。杂种F1稻曲病病穗率、病情指数、平均每穗病粒数和单穗最高病粒数与恢复系对应指标极显著正相关。[结论]该研究为两系杂交水稻抗性遗传改良提供参考。

关 键 词：Two-line hybrid rice False smut Resistance inheritance 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]