Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2017, Vol. 33 ›› Issue (35): 132-136.doi: 10.11924/j.issn.1000-6850.casb16110006

Special Issue: 园艺

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Identification and Homology Analysis of Colletotrichum gloeosporioides in Grape

  

  • Received:2016-11-01 Revised:2017-11-25 Accepted:2016-12-23 Online:2017-12-14 Published:2017-12-14

Abstract: The objectives are to clarify fungal species and genetic characteristics of Colletotrichum gloeosporioides, and provide basis for further studying this disease. The identification and homology analysis of 26 strains of C. gloeosporioides from different districts were conducted by morphology and rDNA-ITS sequence analysis. PCR amplification was performed with fungal universal primers ITS4 and ITS5. We compared the sequences with the sequences available in NCBI, and cluster analysis was conducted with Clustalx 1.83 and MEGA 5.0 software. Results indicated that colony color was white or grey white, hypha exhibited velvet or flocculent, conidium showed cylindrical shape or cylindric shape, and was colorless; ITS sequence of pathogen was about 500 bp, all identified pathogen were C. gloeosporioides. Although grape anthrax from different districts exhibited high sequence homology and close genetic relationship, different strains showed genetic differences and this difference had no obvious correlation with geographical origin and varieties.