RAPD Analysis of Phenogenic Relationship in Five Cultivated Capsicum Species

ACTA HORTICULTURAE SINICA ›› 2006, Vol. 33 ›› Issue (4): 751-756.

• 研究论文 • Previous Articles Next Articles

RAPD Analysis of Phenogenic Relationship in Five Cultivated Capsicum Species

Chen Xuejun^{1, 2};Chen J infeng^1*; Geng Hong¹;Lou Qunfeng¹

(¹National Key Laboratory of Crop Genetics and Germplasm Enhancement, Department of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China; ²Vegetable and Flower Institute, Jiangxi Academy of Agricultural Sciences,Nanchang, Jiangxi 330200, China)

Received:2005-10-08 Revised:2006-02-27 Online:2006-08-25 Published:2006-08-25

Abstract

Abstract: RAPD analysis was conducted in 31 accessions from 5 cultivated species in Capsicum. Thirtyone primers generated 276 scorable RAPD bands ofwhich 244 were polymorphic. The percentage of polymorphic loci ( PPB) and Shannonps information index ( I) in C. annuum were 32.97% and 0.1599 respectively, indicating the genetic diversitywithin C. annuum was low. Jaccard's similarity between pairs of accessionsranged from 0.349 to 0.952 with a mean of 0.729. The results from cluster analysis showed that the genetic distances of C. annuum with other four species beginningwith nearerwere C. chinense, C. frutescens, C. pubescens and C. baccatum. The cluster formed by the 24 accessions of C. annuum did not fully correspond to the current morphologic classification, suggesting that the genetic differences among those accessions of C. annuum could not be precisely reflected by the current taxonomic system. Great diversity of amp lification bands was observed between C. baccatum accession from Xishuangbanna, China and that from America, which provided us with new evidence to the argument that if the Xishuangbanna area in China was also a place for pepper origin.

Key words: Capsicum, Genetic diversity, RAPD marker, Cluster analysis

Chen Xuejun;;Chen J infeng;Geng Hong;Lou Qunfeng. RAPD Analysis of Phenogenic Relationship in Five Cultivated Capsicum Species[J]. ACTA HORTICULTURAE SINICA, 2006, 33(4): 751-756.

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RAPD Analysis of Phenogenic Relationship in Five Cultivated Capsicum Species

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