High level of natural variation in a groundnut (Arachis hypogaea L.) germplasm collection assayed by selected informative SSR markers

    Varshney, R K and Thudi, M and Aruna, R and Nigam, S N and Neelima, K and Vadez, V and Hoisington, D A (2009) High level of natural variation in a groundnut (Arachis hypogaea L.) germplasm collection assayed by selected informative SSR markers. Plant Breeding, 128 (5). pp. 486-494.

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    Abstract

    The ability to identify genetic variation is indispensable for effective management and use of genetic resources in crop breeding. Genetic variation among 189 groundnut (Arachis hypogaea L.) accessions comprising landraces, cultivars, a mutant, advanced breeding lines and others (unknown genetic background) representing 29 countries and 10 geographical regions was assessed at 25 microsatellite or simple sequence repeat loci. A high number of alleles (265) were detected in the range of 3 (Ah1TC6G09) to 20 (Ah1TC11H06) with an average of 10.6 alleles per locus. The polymorphism information content value at these loci varied from 0.38 (Ah1TC6G09) to 0.88 (Ah1TC11H06) with an average of 0.70. A total of 59 unique alleles and 127 rare alleles were detected at almost all the loci assayed. Cluster analysis grouped 189 accessions into four clusters. In general, genotypes of South America and South Asia showed high level of diversity. Extraordinary level of natural genetic variation reported here provides opportunities to the groundnut community to make better decisions and define suitable strategies for harnessing the genetic variation in groundnut breeding.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Groundnut
    Depositing User: Library ICRISAT
    Date Deposited: 26 Aug 2011 11:06
    Last Modified: 07 Sep 2017 09:59
    URI: http://oar.icrisat.org/id/eprint/589
    Official URL:
    Projects: UNSPECIFIED
    Funders: Generation Challenge Programme, Indian Council of Agricultural Research
    Acknowledgement: The present study was carried out by financial support from Generation Challenge Programme (http://www.generationcp.org) and National Fund for Basic and Strategic Research in Agriculture of Indian Council of Agricultural Research.
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