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Crop wild relatives are important components of agroecosystems and have over the years been exploited in\udbreeding programs as sources of genes for novel traits. Information on the extent and patterns of variability is\udimportant in formulating effective conservation and utilization strategies for existing crop wild relative\udpopulations. We conducted surveys and collections of wild and weedy accessions of Sorghum bicolor\ud(L.) Moench in Lambwe Valley in western Kenya in order to investigate occurrence, distribution, and\udmorphological variability in the wild-weedy complex of S. bicolor under local agroecological conditions. We\udalso attempted to understand the role, if any, of crop-to-wild gene flow in structuring variability within and\udamong populations. The morphological data presented here showed wide variability within wild-weedy\udsorghum populations with respect to habitats and morphotypes. True wild sorghum populations in national\udparks and the sugarcane belt were clearly distinguishable from the putative hybrids or intermediate forms\udfound in sorghum fields, in sorghum field margins, and, to some extent, by the roadside near sorghum fields.\udThe existence of these intermediate forms is empirical evidence of introgression between cultivated sorghum\udand its wild-weedy relatives. Extensive introgression, especially within in situ conservation areas and/or in\udareas of high diversity, would lead to genetic erosion and possible depletion of these important wild sorghum\udgenetic resources

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