5个抗稻瘟病基因在南繁水稻育种材料中的分布及组合特征

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中图分类号S511文献标识码A文章编号 0517-6611（2025）18-0118-03doi：10.3969/j.issn.0517-6611.2025.18.025

Distribution and Combination Features of Five Blast Resistant Genes in Southern Propagation Rice Materials YUJun-jie，SUNTong-qing，YANGLiuetal（JiangsuProvincialSeedSouthernPropagationandIdentficationStationNjng，Jngu ）

AbstractObetie]ToclarifythdistrbutioofblastesistanegesinsouthepropagatiocemateralsfJangsuProvietod The presence of Pi5，Pi9，Pia，Pigm and Pita blast resistance genes in 11963 rice breeding materials were analyzed using penta-primer amplificationrefractorymutationsystem（PARMS）.ResultTenumberofblastresistancegnescariedpericematerialrangedfromOto4ith materials harboring a single resistance gene being the most prevalent （ 49.09% ），while those carrying four genes were extremely rare （0.07%） L Significant diffrences were observed in the distribution frequencies of the five resistance genes，ranging from 0.88% to 47.74% .The Pita gene exhibited the highest frequency （47.74%） ，followed by Pi5 （ 18.26% ）， Pia （ 17.45% ），andPigm（ 14.19% ），while Pi9 showed the lowest frequency （ 0.88% ）.A totalof 22 blastresistancegenecombinations wereidentifiedamong the11963materials.Among combinations withtwoor more genes， Pita+Pia was the most common （959 materials），followed by Pita+Pi5 （690 materials）.[Conclusion] This study provides a prelimiaryudesadgofsrtiooflassisasgopticateralsteical the future development of broad-spectrum blast-resistant varieties through targetedutilization of these resistance genes.

Key wordsRice; Blast resistance gene;PARMS technology;Disease-resistant breeding

水稻（Oryzasativa）作为我国最重要的粮食作物之一，是全国 60% 以上人口的主食，其高产稳产事关国家粮食安全[1]。（剩余7266字）