Utilization of wild relatives in the genetic improvement of Arachis hypogaea L. : 7. Autotetraploid production and prospects in interspecific breeding.

    Singh, A K (1986) Utilization of wild relatives in the genetic improvement of Arachis hypogaea L. : 7. Autotetraploid production and prospects in interspecific breeding. Theoretical and Applied Genetics, 72 (02). pp. 164-169. ISSN 0040-5752

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    Abstract

    Autotetraploids were established from 8 diploid wild species of section Arachis. In all the autotetraploids the chromosomes paired largely as bivalents even though they possess the ability to pair as multivalents. Pollen and pod fertility in the C1 generation were not directly associated with chromosome pairing. The C2 generation autotetraploids showed a gradual increase in bivalent associations and pollen and pod fertility. The identification of two genomes, A and B, in the diploid species and in the tetraploid, A. hypogaea, of the section Arachis, a fairly good crossability, and the type of chromosome associations observed in hybrids between A. hypogaea and the autotetraploids of wild Arachis species indicated good prospects of utilizing autotetraploids as genetic bridges in transferring desired traits from these taxa into groundnut.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Autotetraploids, Genetic improvement, Arachis, Autotetraploid, Chromosome pairing, Genomic relationships, Recombinations
    Subjects: Others > Plant Breeding
    Mandate crops > Groundnut
    Others > Genetics and Genomics
    Depositing User: Mr Ramesh K
    Date Deposited: 21 Sep 2016 04:54
    Last Modified: 17 May 2017 10:10
    URI: http://oar.icrisat.org/id/eprint/9682
    Official URL: http://dx.doi.org/10.1007/BF00266988
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: The author is indebted to Mr. R.W. Gibbons, Leader, Groundnut Improvement Program ICRISAT for his critical reading of the manuscript and for his suggestions.
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