Biogeography of wild Arachis (Leguminosae):distribution and environmental characterisation

Ferguson, M E and Jarvis, A and Stalker, H T and Williams, D E and Guarino, L and Valls, J F M and Roy, N P and Simpson, C E and Bramel, P J (2005) Biogeography of wild Arachis (Leguminosae):distribution and environmental characterisation. Biodiversity and Conservation, 14 (7). pp. 1777-1798. ISSN 0960-3115

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Geographic Information System (GIS) tools are applied to a comprehensive database of 3514 records of wild Arachis species to assist in the conservation and utilisation of the species by: (a) determining the distributional range of species and their abundance; (b) characterising species environments; (c) determining the geographical distribution of species richness; and (d) determining the extent to which species are associated with river basins. Distributional ranges, climatic variables and indices of endemism for each species are tabulated. A. duranensis Krapov. & W.C. Gregory, the most probable donor of the A genome to the cultivated peanut, is distributed in close proximity to both the proposed donor of the B genome, A. ipaënsis, and the closest wild relative of the cultigen, A. monticola Krapov. & Rigoni. This region in the eastern foothills of the Andes and the adjoining chaco regions of Argentina, Bolivia and Paraguay, is a key area for further exploration for wild Arachis. An area of particularly high species richness occurs in the State of Mato Grosso, close to the Gran Pantanal in southwest Brazil. Seventy-one percent of the species were found to have some degree of association with water catchment areas, although in most cases it was difficult to determine whether this was due to climatic adaptation reasons, restricted dispersal due to geocarpic habit, or the role of watercourses as a principal dispersal agent. In only two cases could climatic adaptation be eliminated as the reason for species distribution

Item Type: Article
Uncontrolled Keywords: Arachis; Ecogeography; Geographical distribution; GIS Species richness
Subjects: Mandate crops > Groundnut
Depositing User: Ms K Syamalamba
Date Deposited: 16 Jan 2013 08:42
Last Modified: 07 Feb 2014 05:31
Official URL:
Acknowledgement: UNSPECIFIED
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