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Variation studies in a wild groundnut species, Arachis stenosperma Krapov. & W.C. Gregory nov. sp.

Published online by Cambridge University Press:  16 October 2024

A. K. Singh ,
J. Smartt  and
Rakesh Singh
A. K. Singh*
Affiliation:
1National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi 110 012, India
J. Smartt
Affiliation:
2School of Biological Sciences, University of Southampton, Southampton S016 5PX, UK
Rakesh Singh
Affiliation:
1National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi 110 012, India
*
* Corresponding author. E-mail: [email protected]
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Abstract

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Wild relatives of crop species are known to be sources of genetic diversity that can be used in crop improvement. However, they have not always been studied adequately for the variation that may exist within them, for traits which may have important implications from an evolutionary point of view and their use in breeding programmes. In the present study, a wild groundnut species, Arachis stenosperma, has been studied for variation between accessions collected from different sites in Brazil for morphological and certain nutritional traits, and for disease resistance. Multivariate analysis of 23 characters grouped 18 accessions into two clusters, while one accession, ICG 14927, was distinct from these. However, in protein profile they all appear identical. Hence, the variation appears to have arisen in response to the climatic conditions of their habitat, which has implications for use of these accessions in breeding programmes. The variation in these traits could not be associated with any phytogeographical regions. The dispersal of this species from its centre of origin and diversity to other parts of Brazil appears to be recent and without any identifiable selection pressures having operated.

Keywords

Arachis stenospermagroundnut rustprincipal coordinate analysisproteinprotein profilevariation
Type
Research Article
Information
Plant Genetic Resources , Volume 2 , Issue 2 , August 2004 , pp. 99 - 106
Copyright
© NIAB 2004

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