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Apple ( malus domestica Borkh.), which is a widely cultivated, important and economic fruit crop with nutritive and medicinal importance, has emerged as a model horticultural crop in this post-genomic era. Wild apple resources are important and they develop gradually in apple industry and genetic diversity. In this study, two molecular markers (inter-simple sequence repeats, ISSR and sequence-specific amplification polymorphism, S-SAP) were evaluated for genetic analysis of 31 wild apple resources in Shandong. A total of 20 ISSR primers were used and 110 polymorphic bands were amplified. Five S-SAP primer sets yielded a total of 496 bands, of which 201 (40.52%) were polymorphic. The similarity coefficient between resources ranged from 0.70 to 0.94 for ISSR analysis and from 0.66 to 0.95 using the S-SAP methodology. This study indicates that the results obtained based on the dendrograms constructed using unweighted pair-group using arithmetic average (UPGMA) cluster analysis were significantly correlated. The ISSR and S-SAP markers were found to be useful for wild apple resources identification and assessment of phonetic relationships.

african journal of biotechnology

Genetic analysis of wild apple resources in Shandong province based on inter-simple sequence repeats (ISSR) and sequence-specific amplification polymorphism (S-SAP) markers