Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (6): 1233-1246.doi: 10.16420/j.issn.0513-353x.2021-0297

• Research Papers • Previous Articles     Next Articles

Population Genetic Structure of Xanthomonas citri pv. citri in Guangdong Province Based on the STR Locus

LI Wenting, LI Cuixiao, LIN Xiaoqing, ZHENG Yongqin, ZHENG Zheng(), DENG Xiaoling()   

  1. College of Plant Protection,South China Agricultural University,Guangzhou 510642,China
  • Received:2021-05-10 Revised:2022-01-24 Online:2022-06-25 Published:2022-07-04
  • Contact: ZHENG Zheng,DENG Xiaoling;


Citrus canker is one of the most serious diseases in citrus production,which is caused by Xanthomonas citri pv. citriXcc). In order to systematically and comprehensively learn the genetic structure of citrus canker strains in Guangdong Province,six highly variable locus were selected by comparing and analyzing the short tandem repeat loci of the whole genome sequence of eight Chinese strains,and the genetic diversity of 352 strains of 14 varieties from 15 cities(counties)in Guangdong Province was analyzed. The results showed that based on the genetic diversity and genetic distance of Guangdong Province in different parts of the citrus canker strains identified six groups:Ⅰgroup(Chaozhou and Shanwei),Ⅱ group(Meizhou and Heyuan),Ⅲ group(Zhaoqing,Guangzhou,Jiangmen,Foshan and Huizhou),Ⅳ group(Yangjiang,Maoming and Zhanjiang)Ⅴ group(Yunfu),Ⅵ group(Shaoguan and Qingyuan). Based on the genetic diversity and genetic distance on the different varieties of citrus canker in Guangdong strains identified five groups:Ⅰgroup(Wogan,Gonggan,Zhushaju,Shatamhju,Chazhigan,Hongjiangcheng and Mashuiju),Ⅱ group(Qicheng and Ningmeng),Ⅲ group(Jiaogan,Maogugan and Chuntianju),Ⅳ group(Shatianyou). The results can provide a theoretical basis for the epidemic regularity of citrus canker disease in Guangdong province.

Key words: citrus, Xanthomonas citri pv. citri, short tandem repeat, genetic diversity

CLC Number: