杂交水稻2025，Vol.40Issue(2)：8-14,7.DOI:10.16267/j.cnki.1005-3956.20240408.106
8份籼型水稻恢复系主要农艺性状的配合力及遗传参数分析
Analysis of Combining Ability and Genetic Parameters of Main Agronomic Traits of Eight Indica Rice Restorer Lines
摘要
Abstract
Using eight indica restorer lines and control 9311 as male parent and three male sterile lines as female parent,27 hybrid combinations were made according to incomplete diallel cross design,and the combining ability and genetic parameters of agronomic traits were analyzed.The results showed that 8W1486,8W1484,8W227 and R1576 exhibited high GCA effect value and good combining ability,which was conducive to developing high yield combinations.Zhan 998S/8W1484 and Zhuo 234S/8W1486 had higher SCA effect values and higher phenotypic values of yield per plant and showed better yield advantages.There was no significant correlation between general combining ability and special combining ability.The contribution rate of parental GCA genotypic variance was greater than that of SCA genotypic variance of hybrid combination in the traits of plant height,panicle length,total spikelets per panicle,seed setting rate and yield per plant,which indicates that they are mainly affected by additive effect of gene.The contribution rate of SCA genotypic variance of hybrid combination was greater than that of parental GCA genotypic variance in the traits of effective panicles per plant and 1 000-grain weight,which indicates that they are mainly affected by non-additive effect of gene.Plant height,effective panicles per plant,panicle length,total spikelets per panicle,seed setting rate,1 000-grain weight and yield per plant were mainly controlled by the inheritance of male parent.The heritability of plant height,1 000-grain weight and panicle length was high,so the genetic stability in offspring would be good,which is suitable for low generation selection in breeding practice.The heritability of total spikelets per panicle and seed setting rate was low,so it was suitable to conduct selection in higher generation.Therefore,in breeding practice,the selection of parents with high combining ability and the screening of special combining ability of hybrid combination should be taken into account at the same time,so as to effectively utilize the heterosis of rice.关键词
杂交水稻/籼型恢复系/农艺性状/配合力/遗传参数Key words
hybrid rice/indica restorer line/agronomic trait/combining ability/genetic parameter分类
农业科技引用本文复制引用
苏锐,邹梦思,黎江凤,罗靖凯,李婷,宋子健,唐文帮,张桂莲..8份籼型水稻恢复系主要农艺性状的配合力及遗传参数分析[J].杂交水稻,2025,40(2):8-14,7.基金项目
国家自然科学基金项目(31871599) （31871599）
湖南省自然科学基金项目(2021JJ30350) （2021JJ30350）
湖南省科技重大专项(2023NK1010) （2023NK1010）
