The phylogenetic relationship of possible progenitors of the cultivated peanut

Jung , S. and Tate , P.L. and Horn , R. and et al, . (2003) The phylogenetic relationship of possible progenitors of the cultivated peanut. Journal of Heredity, 94 (4). pp. 334-340.

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Abstract

The cultivated peanut (Arachis hypogaea L.) is an allotetraploid composed of A and B genomes. The phylogenetic relationship among the cultivated peanut, wild diploid, and tetraploid species in the section Arachis was studied based on sequence comparison of stearoyl-ACP desaturase and oleoyl-PC desaturase. The topology of the trees for both fatty acid desaturases displayed two clusters; one cluster with A genome diploid species and the other with B genome diploid species. The two homeologous genes obtained for each of the two fatty acid desaturases from the tetraploid species A. hypogaea and A. monticola were separated into the A and B genome clusters, respectively. The gene phylogenetic trees showed that A. hypogaea is more closely related to the diploid species A. duranensis and A. ipaensis than to the wild tetraploid species A. monticola, suggesting that A. monticola is not a progenitor of the cultivated peanut. In addition, for the stearoyl-ACP desaturase, the A. duranensis sequence was identical with one of the sequences of A. hypogaea and the A. ipaensis sequence was identical with the other. These results support the hypothesis that A. duranensis and A. ipaensis are the most likely diploid progenitors of the cultivated tetraploid A. hypogaea.

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Phylogenetic, Progenitors, Peanut
Author Affiliation: Department of Genetics and Biochemistry, Clemson University, USA.
Subjects: Crop Improvement
Divisions: Groundnut
Depositing User: Mr Arbind Seth
Date Deposited: 25 Apr 2013 14:51
Last Modified: 25 Apr 2013 14:51
Official URL: http://dx.doi.org/10.1093/jhered/esg061
URI: http://eprints.icrisat.ac.in/id/eprint/10380

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