Assessment of the genetic relationship and diversity of mango and its relatives by cpISSR marker.
He XinHua, Guo YongZe, Li YangRui, Ou ShiJin
Author Affiliation: Guangxi Crop Genetic Improvement and Biotechnology Laboratory, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
Agricultural Sciences in China 6 : 137-142
Abstract : Chloroplast intersimple sequence repeat markers in mango were developed and used to analyse the genetic relationship and diversity of mango and its relatives. Thirty-six mango cultivars (Mangifera indica) and its relative species collected from the fruit germplasm collection in the Guangxi Academy of Agricultural Sciences, China, were examined by ISSR-PCR with chloroplast DNA (cpDNA). Eight better primers for chloroplast DNA that provided reproducible, polymorphic DNA amplification patterns were screened from 50 ISSR primers and used for UPGMA analysis. According to the band patterns with 8 primers for chloroplast DNA, all cultivars tested were distinguished from each other and these showed ample genetic diversity; the average percentage of polymorphism was 77.2%. The 36 samples could be clustered into four groups by UPGMA analysis at the coefficient 0.74. The results indicated that the cpISSR marker was a new powerful tool for the identification of mango cultivars or its relative species, and their genetic relationship analysis and diversity evaluation.