植物遗传资源学报2026，Vol.27Issue(7)：1426-1435,10.DOI:10.13430/j.cnki.jpgr.20260207002
国际野生稻资源稻瘟病抗性鉴定与优异种质筛选
Resistance Identification and Elite Germplasm Screening for Rice Blast in International Wild Rice Resources
摘要
Abstract
Rice blast,caused by Magnaporthe oryzae,is one of the most destructive diseases threatening rice production.Breeding and deploying resistant cultivars is a cost-effective and environmentally sustainable strategy for disease control.However,the frequent breakdown of resistance and the narrow genetic base of resistance genes remain major constraints,highlighting the need to identify new resistant germplasm.Wild rice,as a close relative of cultivated rice,harbors abundant genetic diversity shaped by natural selection and represents an important reservoir for novel blast resistance genes.Nevertheless,large-scale evaluation of blast resistance in international wild rice resources,especially those from Myanmar and Sri Lanka,remains limited.In this study,155 wild rice accessions from China and abroad were evaluated using a detached-leaf puncture inoculation assay against a mixed inoculum comprising 16 M.oryzae physiological races from Sichuan.The tested accessions showed substantial variation in blast resistance.In total,103 accessions were classified as resistant(R)or moderately resistant(MR),accounting for 66.4％of all accessions,including 76 R(49.0％)and 27 MR(17.4％).Among accessions from different origins,the proportion of R accessions from Myanmar and Sri Lanka was 57.7％and 55.6％,respectively,slightly higher than that from China(40.0％from Hainan and 50.0％from Guangxi),and they exhibited relatively lower disease indices.Notably,the resistance frequency(R+MR)of O.nivara from Sri Lanka reached 90.0％,while most accessions from Myanmar were classified as resistant.These results indicate that wild rice accessions from Myanmar and Sri Lanka exhibited higher proportions of resistant and lower proportions of susceptible accessions.In particular.O.nivara from Sri Lanka holds great promise for mining broad-spectrum blast resistance genes and selecting resistant donors.This study provides valuable germplasm resources for broadening the genetic basis of blast resistance in rice breeding.关键词
野生稻/稻瘟病/抗性鉴定Key words
wild rice/rice blast/resistance identification引用本文复制引用
冯文珠,成彦蓉,郭文龙,Disna Ratnasekera,钱前,郑晓明,周雷娜..国际野生稻资源稻瘟病抗性鉴定与优异种质筛选[J].植物遗传资源学报,2026,27(7):1426-1435,10.基金项目
国家自然科学基金(32261143465) （32261143465）
海南省重点研发项目(ZDYF2025SXLH001,ZDYF2024KJTPY001) （ZDYF2025SXLH001,ZDYF2024KJTPY001）
中央级公益性科研院所基本科研业务费专项(Y2025YC12) （Y2025YC12）
海南省科技人才创新项目(KJRC2023A01) （KJRC2023A01）
农业农村部种业提升工程精准鉴定 National Natural Science Foundation of China(32261143465) （32261143465）
Key Research and Development Project of Hainan Province(ZDYF2025SXLH001,ZDYF2024KJTPY001) （ZDYF2025SXLH001,ZDYF2024KJTPY001）
Central Public-interest Scientific Institution Basal Research Fund(Y2025YC12) （Y2025YC12）
Innovational Fund for Scientific and Technological Personnel of Hainan Province(KJRC2023A01) （KJRC2023A01）
Precision Characterization Project of the MARA Seed Industry Enhancement Project （）
