Quantitative DNA variation between and within chromosome complements of Vigna species (Fabaceae)

TitleQuantitative DNA variation between and within chromosome complements of Vigna species (Fabaceae)
Publication TypeJournal Article
Year of Publication1990
AuthorsParida A, Raina S.N, Narayan RKJ
JournalGenetica
Volume82
Start Page125
Issue2
End page133
Date Published1990
Keywordschromosome complements, Genetica, Quantitative DNA, Vigna species (Fabaceae)
Abstract

Cytogenetical investigations, so far, on the organisation and evolution of the genomes of Vigna species have proved difficult due to small chromosome size, large chromosome number and uniformity in chromosome shape and size within and between the complements. In this investigation the nature and extent of DNA variation between thirteen diploid and one polyploid species have been estimated. The DNA variation between diploid species was small and species clustered around a mean value of 2.7 pg. The polyploid species had a greater DNA value of 4.95 pg. No significant variation in 2C DNA content was found between accessions of V. radiata. A comparison of the
distribution of DNA among the chromosomes within complements has shown that the excess DNA acquired in evolution was distributed evenly in all chromosomes despite significant differences in chromosome size. The relative changes in chromatin area and DNA density which accompany evolutionary DNA variation was also compared.

http://link.springer.com/article/10.1007%2FBF00124642

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