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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 11, No. 1, 2008
Bioline Code: ej08014
Full paper language: English
Document type: Short Communication
Document available free of charge

Electronic Journal of Biotechnology, Vol. 11, No. 1, 2008

 en Analysis of genetic diversity among Indian niger [ Guizotia abyssinica check for this species in other resources (L. f.) Cass.] cultivars based on randomly amplified polymorphic DNA markers
Nagella, Praveen; Hosakatte, Niranjana Murthy; Ravishankar, K.V.; Hahn, Eun-Joo & Paek, Kee-Yoeup

Abstract

Randomly amplified polymorphic DNA (RAPD) markers were used to estimate genetic diversity among 18 cultivars of niger from India. Total genomic DNA was extracted and subjected to RAPD analysis using 80 arbitrary 10-mer primers; 17 primers were selected, which yielded a total of 124 bands, 41.20% of them polymorphic. None of the primers produced unique banding pattern for each cultivar. RAPD data were used to calculate a Squared-Euclidean Distance matrix which revealed a minimum genetic distance between cultivars JNC-6 and N-48 and a maximum distance between IGP-76 and JN-30. Based on the distance matrix, a cluster analysis was done using a minimum variance algorithm. The dendrogram generated, based on Ward’s method, grouped 18 niger cultivars into two major clusters. The first cluster consisted of early maturing cultivars (e.g. N-129 and N-134; 80-90 days), and the second of late maturing cultivars (e.g. GA-8 and GA-9; 135-145 days). The present study shows that there is high diversity among the niger cultivars tested and indicates the potential of RAPD markers for identification and maintenance of niger germplasm for crop improvement purposes.

Keywords
genetic diversity, Guizotia abyssinica, molecular markers, RAPD.

 
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