中国农业科学 ›› 2026, Vol. 59 ›› Issue (2): 305-321.doi: 10.3864/j.issn.0578-1752.2026.02.007

• 植物保护 • 上一篇    下一篇

黑龙江省水稻恶苗病致病群体

刘天生(), 刘耕源, 赵安琪, 杨旭, 蔡明雪, 杨艾文, 娄铭轩, 李沐恺, 王晗, 张亚玲()   

  1. 黑龙江八一农垦大学农学院/黑龙江省植物抗性研究中心, 黑龙江大庆 163319
  • 收稿日期:2025-09-18 接受日期:2025-11-08 出版日期:2026-01-16 发布日期:2026-01-22
  • 通信作者:
    张亚玲,E-mail:
  • 联系方式: 刘天生,E-mail:1243351340@qq.com。
  • 基金资助:
    国家重点研发计划(2023YFD2301603-03); 黑龙江八一农垦大学研究生创新科研项目(YJSCX2024-Y11)

Pathogenic Population of Rice Bakanae Disease in Heilongjiang Province

LIU TianSheng(), LIU GengYuan, ZHAO AnQi, YANG Xu, CAI MingXue, YANG AiWen, LOU MingXuan, LI MuKai, WANG Han, ZHANG YaLing()   

  1. College of Agronomy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Research Center of Plant Resistance, Daqing 163319, Heilongjiang
  • Received:2025-09-18 Accepted:2025-11-08 Published:2026-01-16 Online:2026-01-22

摘要:

【目的】 探明黑龙江省水稻恶苗病病原种类及优势致病菌,为水稻恶苗病的精准防控提供依据。【方法】 2023年,采集黑龙江省8市15县(区)水稻恶苗病样品,经组织分离法和稀释涂布法,共分离纯化172株单孢菌株。通过形态学鉴定,结合多基因联合系统发育分析(ITSRPB2TEF1-αLSUTUB2)及柯赫氏法则验证完成水稻恶苗病病原菌鉴定。【结果】 172株水稻恶苗病原菌根据形态特征划分为31种类型。多基因联合系统发育分析鉴定出15种基因型,所分离的致病菌包含FFSC、FNSC、FOSC、FIESC 4个复合种。其中优势致病菌为FFSC复合种中的藤仓镰孢(Fusarium fujikuroi分离得到148株,占分离菌株总数的86.05%,包含4种基因型,有18种菌态;复合种中还分离到9株Fusarium madaense,占5.23%,包含1种基因型3种菌态,以及1株Fusarium subglutinans,占0.58%,有1种基因型1种菌态。FIESC复合种中包含2株Fusarium wereldwijsianum,占1.16%,包含2种基因型2种菌态;7株Fusarium ipomoeae,占4.07%,包含5种基因型5种菌态。FNSC、FOSC复合种中各分离到4株Fusarium arbusti和1株Fusarium cugenangense,分别占2.33%、0.58%,各有1种基因型1种菌态。7种镰孢菌均具致病性但致病程度不同,优势致病菌藤仓镰孢导致水稻芽腐、徒长,F. arbusti仅导致水稻芽腐,F. ipomoeae、F. subglutinansF. wereldwijsianum抑制水稻生长,F. madaenseF. cugenangense导致水稻徒长。【结论】 黑龙江省水稻恶苗病致病菌为藤仓镰孢、F. madaense、F. ipomoeae、F. arbusti、F. wereldwijsianum、F. subglutinans、F. cugenangense 7个种,致病类型和地理分布因病原菌种类不同存在明显差异。其中藤仓镰孢和F. arbusti致病力最强;藤仓镰孢在黑龙江省各地区均有发现,为优势致病菌。

关键词: 水稻, 水稻恶苗病, 真菌病原, 优势致病菌, 黑龙江省

Abstract:

【Objective】 The objective of this study is to investigate pathogen species and dominant pathogenic fungi of rice bakanae disease in Heilongjiang Province, and to provide a basis for precise prevention and control of rice bakanae disease. 【Method】 In 2023, rice bakanae disease samples were collected from 8 cities and 15 counties (districts) in Heilongjiang Province. A total of 172 single-spore strains were isolated and purified from the samples using tissue separation method and dilution plating method. Morphological identification, combined with multilocus phylogenetic analysis using ITS, RPB2, TEF1-α, LSU, and TUB2, and validation via Koch’s postulates, was used to complete the identification of the pathogen causing rice bakanae disease.【Result】172 strains of the pathogenic fungi causing rice bakanae disease were classified into 31 morphotypes based on their morphological characteristics. Multilocus phylogenetic analysis identified 15 genotypes, and the isolated pathogenic fungi included four species complexes: FFSC, FNSC, FOSC, and FIESC. Among them, the dominant pathogenic fungus was Fusarium fujikuroi in the FFSC. A total of 148 strains were obtained, accounting for 86.05% of the total number of isolated strains, and comprising 4 genotypes and 18 morphotypes. Nine strains of Fusarium madaense were also obtained from this species complex, accounting for 5.23% of the total strains, with 1 genotype and 3 morphotypes. In addition, 1 strain of Fusarium subglutinans was identified, representing 0.58% of the total, with 1 genotype and 1 morphotype. In the FIESC, 2 strains of Fusarium wereldwijsianum were obtained, accounting for 1.16% of the total strains, with 2 genotypes and 2 morphotypes; 7 strains of Fusarium ipomoeae were also identified, representing 4.07% of the total, with 5 genotypes and 5 morphotypes. From each of the FNSC and FOSC, 4 strains of Fusarium arbusti and 1 strain of Fusarium cugenangense were obtained, accounting for 2.33% and 0.58% of the total strains, respectively, with 1 genotype and 1 morphotype for each species. All 7 Fusarium species were pathogenic, but with varying degrees of pathogenicity. The dominant pathogenic fungus, F. fujikuroi, caused rice bud rot and etiolation; F. arbusti induced only rice bud rot; F. ipomoeae, F. subglutinans and F. wereldwijsianum inhibited rice growth; F. madaense and F. cugenangense resulted in rice etiolation. 【Conclusion】 The pathogens causing rice bakanae disease in Heilongjiang Province include 7 species: F. fujikuroi, F. madaense, F. ipomoeae, F. arbusti, F. wereldwijsianum, F. subglutinans, and F. cugenangense. Obvious differences exist in pathogenic types and geographical distribution depending on the pathogen species. Of these, F. fujikuroi and F. arbusti exhibited the strongest pathogenicity; F. fujikuroi was detected in all regions of Heilongjiang Province and served as the dominant pathogenic fungus.

Key words: rice, rice bakanae disease, fungal pathogen, dominant pathogen, Heilongjiang Province