耕作与栽培2026，Vol.46Issue(3)：7-12,17,7.
10个水稻种质资源稻瘟病抗性表达与产量性状分析
Analysis of Blast Resistance Expression and Yield Traits in 10 Rice Germplasm Resources
摘要
Abstract
To investigate the genetic relationship between blast resistance and yield traits in medium indica rice combina-tions,ten new medium indica rice combinations and one control were used as materials.The yield components of these ma-terials were systematically measured,and natural induction identification was conducted in disease nurseries in Anhui Provincesand Hubei Province to calculate the mean resistance index(MRI).Furthermore,eight blast resistance genes were detected using molecular marker technology.Comprehensive evaluations of multiple traits were performed using correla-tion analysis,path analysis,and principal component analysis(PCA).The results showed that the number of filled grains per panicle had the largest direct effect on yield(0.65),making it the core determinant of yield formation.Materials with a higher MRI tended to have lower numbers of filled grains per panicle and lower yields.For example,the highly suscep-tible control(ck)exhibited lower yield than several moderately resistant combinations,suggesting a clear'resistance-yield'trade-off within the tested population.Notably,combinations carrying the Pigm gene achieved relatively high yields while maintaining moderate resistance levels,indicating the potential value of this gene in synergistic improvement.A medium-resistance and high-yield breeding strategy was proposed,based on'avoiding high susceptibility'and centered on'enhanc-ing the number of filled grains per panicle and seed setting rate'.This study provides a new theoretical basis and elite pa-rental materials for the synergistic breeding of high-yield and blast-resistant rice.关键词
中籼稻/稻瘟病/产量构成/性状权衡Key words
medium indica rice/rice blast/yield components/trait trade-off分类
农业科技引用本文复制引用
申关望,董雷,沈光辉,胡杨,张凯璇,韩容,余林闯,陆云,陈庆明,杨庆红,扶定,祁玉良,余新春,徐士库..10个水稻种质资源稻瘟病抗性表达与产量性状分析[J].耕作与栽培,2026,46(3):7-12,17,7.基金项目
河南省重点研发专项"优质高产绿色高效水稻新品种培育与应用"(23111110500) （23111110500）
国家水稻产业技术体系建设专项资金项目(CARS-01) （CARS-01）
河南省水稻产业技术体系建设专项资金项目(HARS-22-03) （HARS-22-03）
水稻优质抗病亲本创制与高产广适新品种培育应用(252102110261) （252102110261）
