Genetic Relationship Analysis of Cucumber Germplasms Based on SSR Markers

doi:10.7668/hbnxb.2015.S1.006

Abstract

Abstract: Drought cucumber is one of the characteristics of industrial advantages of Jidong area.To evaluate the genetic diversity and relationship of cucumber germplasm,38 South-China ecotype cucumber accessions were subjected to analysis of diversity and cluster via 450 paires of SSR markers.72 SSR primers generated 133 polymorphic bands on an average of 1.85 polymorphic bands per primer pairs(ranged from 1 to 4).The index of dissimilarity of 38 cucumber germplasm accessions varied from 0.215 to 0.704.A close genetic relationship was found between Sijicuilü and gfcs,Yufeicui and Cuiyu,Tangshanqiugua and Zhenbawo,and between Zhenbawo and Huangjialüxiu.But the genetic relationship between Jiameihanhuanggua and Xuanfeng or 6457,and between Xinbao and Lüzhiqiu were relatively distant.The clustering analysis showed that the 38 accessions were divided into two groups,group Ⅰ and Ⅱ,at a threshold 0.54.Further,the group Ⅰ was subdivided intoⅠ_A,Ⅰ_B,Ⅰ_C and Ⅰ_D subgroups while the group Ⅱ was subdivided intoⅡ_A,Ⅱ_B and Ⅱ_C at the threshold 0.48.The results were helpful to the parental selection and cross planning in breeding programs for South-China cucumber.

Key words: Cucumis sativus L., Genetic resources, Genetic relationship, Genetic diversity, SSR

CLC Number:

S642.03

GUO Rong-yu, LU Man, SONG Xiao-fei, SUN Cheng-zhen, LI Xiao-li, YAN Li-ying. Genetic Relationship Analysis of Cucumber Germplasms Based on SSR Markers[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(S1): 32-37. doi: 10.7668/hbnxb.2015.S1.006.

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