Genome size in wild and cultivated peanut germplasm

Lavia, G.I. and Fernandez, A. (2008) Genome size in wild and cultivated peanut germplasm. Plant Systematics and Evolution, 272 (1-4). pp. 1-10.

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Genome size of 16 species of Arachis L. with x = 10 and three with x = 9 was determined. DNA content (2C) between all diploid species, varies from 2.87 pg in A. retusa to 6.59 pg in A. douradiana. Considering species with 2n = 2x = 20 of all the sections, it suggests that in the evolution of Arachis genome, both increases and diminutions of DNA content would have occurred. Species with greater DNA content are included in sections believed to have a more recent origin, whereas those that contain minor DNA belong to the oldest sections; therefore, we propose genome evolution of Arachis toward higher DNA content. Origin of the basic chromosome number x = 9 is discussed considering genome size variation between species with x = 10 and x = 9. Reduction of the DNA content after the polyploidization would have happened in A. hypogaea.

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Arachis, Peanut, DNA content, Genome evolution, Phylogenetic relationships, Aneuploidy
Author Affiliation: Instituto de Botánica del Nordeste, Argentina
Subjects: Crop Improvement > Genetics/Genomics
Divisions: Groundnut
Depositing User: Mr Arbind Seth
Date Deposited: 15 May 2013 03:56
Last Modified: 15 May 2013 03:56
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