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    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Adugna, Asfaw and Bekele, Endashaw 2016. Indirect estimates reveal the potential of transgene flow in the crop–wild–weed Sorghum bicolor complex in its centre of origin, Ethiopia. Plant Genetic Resources, p. 1.

    Adugna, Asfaw 2013. Ecotypic variation for seed dormancy, longevity and germination requirements in wild/weedy Sorghum bicolor in Ethiopia: implications for seed mediated transgene dispersal and persistence. SpringerPlus, Vol. 2, Issue. 1, p. 248.

    Teshome, Mesfin and Feyissa, Tileye 2013. Genetic Diversity of Wild Sorghum (Sorghum bicolor ssp. verticilliflorum (L.) Moench) Germplasm from Ethiopia as Revealed by ISSR Markers. Asian Journal of Plant Sciences, Vol. 12, Issue. 3, p. 137.


Geographical distribution and phenotypic diversity of wild/weedy sorghum [Sorghum bicolor (L.) Moench] in Ethiopia: implications for germplasm conservation and crop–wild gene flow

  • Asfaw Adugna (a1) (a2) and Endashaw Bekele (a1)
  • DOI:
  • Published online: 29 November 2012

Extensive studies of genetic diversity and population structure important for conservation of wild sorghum are yet lacking in Ethiopia, the centre of origin for cultivated sorghum. To assess both genetic diversity and the probability of gene flow between wild and cultivated types, collections of wild Sorghum bicolor were made from regions in Ethiopia where wild and cultivated sorghum coexist. Morphological data were recorded in situ for both quantitative and qualitative characters from 30 populations in five diverse geographical regions and eight agroecologies. High phenotypic diversity was observed among the wild and weedy sorghum populations. The overall standardized Shannon–Weaver diversity index (H′), computed from the frequencies of all qualitative traits, ranged from 0.47 to 0.98 with an average value of 0.76. Moreover, warm semi-arid lowland (SA2) agroecologies, which contain Tigray populations, supported the highest diversity for these traits. Subspecies verticilliflorum and drummondii (the two major subspecies of wild S. bicolor) were observed in diverse habitats throughout northern and central Ethiopia. In some areas, weedy types showed domestication traits including the absence of awns and reduced seed shattering. The existence of morphologically intermediate forms indicates that gene flow between cultivated and wild forms has likely occurred. Deployment of transgenic crop sorghum, therefore, would pose a distinct risk for transgene movement into wild Ethiopian populations.

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