Analysis of genetic diversity among Indian niger [Guizotia abyssinica (L. f.) Cass.] cultivars based on randomly amplified polymorphic DNA markers
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1 janvier 2008
- handle: 10670/1.46ay3q
Ce document est lié à :
10.4067/S0717-34582008000100014
info:eu-repo/semantics/openAccess
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Varieties, Plant Plants, Cultivated--Varieties Crops--Varieties Cultivars Plants--Varieties Polymnia abyssinica Niger Noog Nigersaat Negrillo Ramtilla Niger seed Noog abyssinia Ramtil GingellikrautCiter ce document
Praveen Nagella et al., « Analysis of genetic diversity among Indian niger [Guizotia abyssinica (L. f.) Cass.] cultivars based on randomly amplified polymorphic DNA markers », Electronic Journal of Biotechnology, ID : 10670/1.46ay3q
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Résumé
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.