Ecogeographical distribution of wild, weedy and cultivated Sorghum bicolor (L.) Moench in Kenya: implications for conservation and crop-to-wild gene flow

Mutegi, E and Sagnard, F and Muraya, M and Kanyenji, B and Rono, B and Mwongera, C and Marangu, C and Kamau, J and Parzies ́, H and de Villiers, S and Semagn, K and Traore, P C S and Labuschagne, M (2010) Ecogeographical distribution of wild, weedy and cultivated Sorghum bicolor (L.) Moench in Kenya: implications for conservation and crop-to-wild gene flow. Genetic Resources and Crop Evolution, 57 (2). pp. 243-253. ISSN 1573-5109

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Abstract

The potential gene flow between a crop and its wild relatives is largely determined by the overlaps in their ecological and geographical distributions. Ecogeographical databases are therefore indispensable tools for the sustainable management of genetic resources. In order to expand our knowledge of Sorghum bicolor distribution in Kenya, we conducted in situ collections of wild, weedy and cultivated sorghum. Qualitative and quantitative morphological traits were measured for each sampled wild sorghum plant. Farmers’ knowledge relating to the management of sorghum varieties and autecology of wild sorghum was also obtained. Cluster analysis supports the existence of several wild sorghum morphotypes that might correspond to at least three of the five ecotypes recognized in Africa. Intermediate forms between wild and cultivated sorghum belonging to the S. bicolor ssp. drummondii are frequently found in predominantly sorghum growing areas. Crop-wild gene flow in sorghum is likely to occur in many agroecosystems of Kenya.

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Uncontrolled Keywords: Agroecosystems, Environmental risk assessment, Genetic resources, Germplasm conservation, GIS, Introgression, Morphological diversity, Sorghum bicolo
Subjects: Mandate crops > Sorghum
Others > Plant Pathology
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 07 Oct 2011 05:37
Last Modified: 07 Sep 2017 05:06
URI: http://oar.icrisat.org/id/eprint/2032
Official URL: http://dx.doi.org/10.1007/s10722-009-9466-7
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: The study presented here forms part of the project “Environmental risk assessment of genetically engineered sorghum in Mali and Kenya”, funded by the United States Agency for International Development (USAID) Biotechnology and Biodiversity Interface Program. Moses Muraya was awarded a PhD grant A0523923 from the Deutscher Akademischer Austausch Dienst (DAAD, Germany). We are also grateful to Zackary Muthamia and Geoffrey Mwachalla for the support provided by the National Gene Bank of Kenya and the East African Herbarium, respectively.
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