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Morphological Variation in the Wild-Weedy Complex of Sorghum Bicolour In Situ in Western Kenya: Preliminary Evidence of Crop-To-Wild Gene Flow ?

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Relation http://oar.icrisat.org/5939/
http://dx.doi.org/10.1086/665266
 
Title Morphological Variation in the Wild-Weedy Complex of Sorghum Bicolour In Situ in Western Kenya: Preliminary Evidence of Crop-To-Wild Gene Flow ?
 
Creator Okeno, J A
Mutegi, E
de Villiers, S
et al, .
 
Subject Sorghum
 
Description Crop wild relatives are important components of agroecosystems and have over the years been exploited in
breeding programs as sources of genes for novel traits. Information on the extent and patterns of variability is
important in formulating effective conservation and utilization strategies for existing crop wild relative
populations. We conducted surveys and collections of wild and weedy accessions of Sorghum bicolor
(L.) Moench in Lambwe Valley in western Kenya in order to investigate occurrence, distribution, and
morphological variability in the wild-weedy complex of S. bicolor under local agroecological conditions. We
also attempted to understand the role, if any, of crop-to-wild gene flow in structuring variability within and
among populations. The morphological data presented here showed wide variability within wild-weedy
sorghum populations with respect to habitats and morphotypes. True wild sorghum populations in national
parks and the sugarcane belt were clearly distinguishable from the putative hybrids or intermediate forms
found in sorghum fields, in sorghum field margins, and, to some extent, by the roadside near sorghum fields.
The existence of these intermediate forms is empirical evidence of introgression between cultivated sorghum
and its wild-weedy relatives. Extensive introgression, especially within in situ conservation areas and/or in
areas of high diversity, would lead to genetic erosion and possible depletion of these important wild sorghum
genetic resources.
 
Publisher University of Chicago Press
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
application/pdf
 
Language en
en
 
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Identifier http://oar.icrisat.org/5939/3/Draft_paper_sorghum_gene_flow_western_Kenya.pdf
http://oar.icrisat.org/5939/2/Int.%20J.%20Plant%20Sci.%20173%285%29%2C%20507-515.pdf
Okeno, J A and Mutegi, E and de Villiers, S and et al, . (2012) Morphological Variation in the Wild-Weedy Complex of Sorghum Bicolour In Situ in Western Kenya: Preliminary Evidence of Crop-To-Wild Gene Flow ? International Journal of Plant Sciences, 173 (5). pp. 507-515. ISSN 1058-5893