RAPD Analysis of Mango Anthracnose
A preliminary study was carried out on their genetic diversity of 70 mango anthracnose isolates from 14 major planting areas in the provinces of Hainan, Guangdong, Guangxi, Sichuan, etc. The genetic polymorphisms of their genomic DNA were studied by RAPD with 19 pairs of 10-bp arbitrary primers and were clustered on coefficients. The 70 isolates were clustered into 2 groups (I and II) and 6 subgroups (I-a, I-b, I-c, I-d, II-a and II-b) based on their genetic similarities, and these subgroups had a similarity coefficient of between 0.306 and 0.928. The isolates from different locations were clustered on low coefficients and those from the same location clustered on high coefficients. This indicated that the genetic basis of mango anthracnose was correlated, although not strictly, with its geographic source, and that the genetic background of the mango anthracnose was similar in the same location.