Genetic Diversity of Cucumber Germplasm Resources Analyzed by Morphological Markers and SRAP Markers

doi:10.11924/j.issn.1000-6850.casb16120040

Abstract

Abstract: To explore the genetic diversity of cucumber germplasm resources and provide a basis for future selection of excellent varieties, with 48 accessions of cucumber germplasm resources as the materials, cluster analysis of 13 phenotypic characters of varieties was conducted by DPS software. Meanwhile, SRAP markers were used to study their genetic diversity. The results showed that, based on the cluster analysis of the fruit characters and other morphological characters, the 48 accessions of cucumber germplasm were divided into five groups at 75.0 of the threshold value. Cluster analysis of SRAP molecular markers by UPGMA method showed that the genetic similarity coefficient among cucumber germplasms was between 0.52-0.93, and the 48 accessions of germplasm were divided into 5 groups at 0.64 of genetic similarity coefficient. There was greater difference between morphological markers and SRAP molecular markers. It was concluded that, compared with morphological markers, SRAP markers could better analyze the genetic relationship among varieties, which had better guidance for studying genetic diversity of cucumber.

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References

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