The genome donors of the groundnut/peanut (Arachis hypogaea L.) revisited

Singh, A.K. and Smartt, J. (1998) The genome donors of the groundnut/peanut (Arachis hypogaea L.) revisited. Genetic Resources and Crop Evolution, 45 (2). pp. 113-118.

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Arachis hypogaea, the cultivated groundnut, is a tetraploid with an AABB genomic constitution. The available literature on the origin of groundnut reveals that there is general agreement that it evolved from the wild tetraploid species A. monticola, with which it crosses freely to produce fertile hybrids. However, the issue of the actual diploid ancestors of A. monticola is still unresolved. Both cytogenetic and molecular evidence support A. duranensis being the most probable progenitor and donor of the A genome to A. hypogaea. For the B genome, the cytogenetic evidence suggests A. batizocoi to be the most probable progenitor, but RFLP banding pattern analysis indicates that A. batizocoi is more distantly related to A. hypogaea than some other species of section Arachis. RFLP analysis has indicated A. ipaensis to be one of the closest related species to A. hypogaea and the possible donor of the B genome. The present article critically analyses the available data, which suggests that until an amphidiploid is produced synthetically between A. duranensis × A. ipaensis and crossed successfully with A. hypogaea to produce a fertile hybrid, this issue will remain unresolved, with A. batizocoi remaining the most probable donor of the B genome because of its directly demonstrable cytogenetic affinity

Item Type: Article
Author Affiliation: International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502 324, Andhra Pradesh, India
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 26 Jul 2011 08:42
Last Modified: 26 Jul 2011 08:42
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