Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (4): 885-892.doi: 10.16420/j.issn.0513-353x.2021-0222

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Resistance Identification and Evaluation of Pepper Germplasm to Colletotrichum acutatum

ZHANG Shicai1, LI Yifei1, WANG Chunping2, YANG Xiaomiao1, HUANG Qizhong1, HUANG Renzhong1,**()   

  1. 1. Vegetable and Flower Research Institute,Chongqing Academy of Agricultural Sciences,Chongqing 401329,China
    2. Biotechnology Research Institute,Chongqing Academy of Agricultural Sciences,Chongqing 401329,China
  • Received:2021-09-06 Revised:2022-01-17 Online:2022-04-25 Published:2022-04-25
  • Contact: HUANG Renzhong


Due to the extreme lack of breeding materials resistant to Colletotrichum acutatum in pepper,it is urgent to import and explore the excellent germplasm resources resistant to anthracnose. In this study,the resistance of 74 imported pepper germplasms from the United States and Spain to anthracnose were identified by in vitro inoculation and field trials. The results showed that 40008 and 30163 had better resistance to anthracnose with the incidence of 4.37% and 1.08% by in vitro inoculation method,and the disease indexes of field trails were 5.49 and 9.07,respectively. 11242 and PI201234 had anthracnose resistance with the incidence of 8.63% and 9.86%,and the disease indexes of field trails was 18.93 and 22.34,respectively. Seventeen germplasms such as 10022 and 10062 showed moderate resistance. The remaining 50 materials were susceptible to anthracnose. Both 40008 and 30163 are late-ripening with small fruit and less fruit set percentage,so it needs to be utilized through the improvement of backcross,anther culture and the molecular biology technology. The results will lay a foundation for the breeding of new anthracnose resistant varieties,QTL mapping and molecular marker development.

Key words: pepper, germplasm resources, Colletotrichum acutatum, resistance identification

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