Utilization of wild relatives in genetic improvement of Arachis hypogaea L. Part 2: Chromosome complements of species in section Arachis

    Singh, A K and Moss, J P (1982) Utilization of wild relatives in genetic improvement of Arachis hypogaea L. Part 2: Chromosome complements of species in section Arachis. Theoretical and Applied Genetics, 61 (4). pp. 305-314. ISSN 0040-5752

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    Abstract

    Analysis of D2 values based on chromosome pair arm ratios for nine diploid Arachis taxa revealed two groups, one represented solely by A. batizocoi. In the larger group, A. villosa and A. correntina were closely related karyotypically and on D2 distance, while A. cardenasii formed a distinct subgroup differing from other species in that chromosome 10 is longer. This grouping was confirmed by canonical analysis. Most of the variation between the diploid species was attributed to chromosome pairs 1, 7, 8 and 9. On the basis of karyotype symmetry, A. villosa and A. correntina, which have arm ratios close to 1, are considered the most primitive diploid species and A. batizocoi, which has one chromosome pair with a subterminal centromere, the most advanced. The tetraploids A. monticola and A. hypogaea were karyotypically similar, although there was a difference in the number of chromosome pairs with a secondary constriction. Karyotype similarities, especially between chromosomes with secondary constriction, suggest that A. cardenasii is an ancestor of the tetraploid species

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Arachis, Karyomorphology, D2 analysis and genetic distance Evolution, Crop improvement
    Subjects: Mandate crops > Groundnut
    Depositing User: Mr B K Murthy
    Date Deposited: 05 Feb 2014 06:09
    Last Modified: 05 Feb 2014 06:09
    URI: http://oar.icrisat.org/id/eprint/7468
    Official URL: http://dx.doi.org/10.1007/BF00272846
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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