Abstract
Genetic diversity in 28 prominent Indian sugarcane varieties cultivated under a wide range of agroclimatic conditions, was studied using 25 RAPD markers. The mean genetic distance among the 28 varieties was only 29.31%, implying that a large part of the genome is similar among the varieties. This probably arises from the lack of parental diversity, with few clones which are themselves related, contributing to the parentage of these varieties. The parentage of the varieties did not contribute significantly to the clustering pattern. Varieties belonging to the same parentage were grouped under different clusters while varieties from different parentages were grouped under the same cluster. The tropical and subtropical identities of the varieties also did not contribute to the clustering pattern as individual clusters included varieties from both tropics and subtropics. This shows that genetically similar varieties are present in both the regions. Among the varieties, Co 7717 was found to be totally distinct and divergent from rest of the varieties. The study reveals the limited genetic base of the current Indian commercial varieties and the need to diversify the genetic base by using new sources from the germplasm.
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Nair, N., Selvi, A., Sreenivasan, T. et al. Molecular diversity in Indian sugarcane cultivars as revealed by randomly amplified DNA polymorphisms. Euphytica 127, 219–225 (2002). https://doi.org/10.1023/A:1020234428681
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DOI: https://doi.org/10.1023/A:1020234428681