| Literature DB >> 743197 |
P K Ranjekar, D Pallotta, J G Lafontaine.
Abstract
The genomes of seven plant species belonging to the genus Allium and exhibiting a threefold variation in their nuclear DNA content were analyzed by studying their reassociation kinetics, equilibrium centrifugation behavior in neutral CsCl gradients, and melting properties. The reassociation kinetics experiments revealed the presence of 44-65% repeated DNA sequences. A comparison between DNA contents and the proportion of repeated DNA sequences indicated that, in Allium, increase in the genome size is not exclusively due to variations in the proportions of repetitive DNA. The total DNA as well as the various repetitive DNA fractions in all the Allium species examined exhibited, in spite of a few differences, a gross similarity in their behavior in neutral CsCl gradients and in their melting properties.Mesh:
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Year: 1978 PMID: 743197 DOI: 10.1007/bf00483747
Source DB: PubMed Journal: Biochem Genet ISSN: 0006-2928 Impact factor: 1.890