Study on Genetic Differentiation of Fusarium oxysporum f. sp. niveum

doi:10.3321/j.issn:1000-7091.2006.z1.038

Abstract

Abstract: Fifty isolates of Fusarium oxysporum f. sp. niveum were RAPD analyzed by using 21 random primers. The result showed that 134 RAPD bands were amplified, among them, 113 (84.3%) bands were polymorphic. Genetic similarity coefficients within the isolates were among 0.45～0.93, there existed a low degree of homogeneity between most of them. When all of polymorphic bands were analyzed by cluster analysis, 50 isolates were classified into 6 groups: Both RG Ⅰ and RG Ⅱ included 1 isolate, respectively, from Qinhuangdao and Xinjiang; RG Ⅲ and RG Ⅴ existed 2 isolates, respectively, from Qinghuangdao, Chengde and Langfang, Cangzhou; RG Ⅵ, It concluded 5 isolates which came from Tangshan, Shijiazhuang, Handan and Xinjiang areas; the others isolates belonged to RG Ⅵ. The result further demonstrated that there existed greater genetic differentiation among watermelon wilt isolates.

Key words: Watermelon, Fusarium oxysporum f. sp. niveum, Genetic different iation, RAPD

CLC Number:

Q536.429

DUAN Hui-jun, GUO Xiao-min, LI Xi-huan, WU Li-qiang, MA Zhi-ying. Study on Genetic Differentiation of Fusarium oxysporum f. sp. niveum[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(S1): 158-161. doi: 10.3321/j.issn:1000-7091.2006.z1.038.

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