Ethnolinguistic Structuring of Sorghum Genetic Diversity in Africa and the Role of Local Seed Systems
Ethnolinguistic structuring of sorghum genetic diversity in Africa and the role of local seed systems Ola T. Westengena,b, Mark Atam Okongoc, Leo Onekd, Trygve Berge, Hari Upadhyayaf,g,h, Siri Birkelandb, Siri Dharma Kaur Khalsab, Kristoffer H. Ringa, Nils C. Stensethb,1, and Anne K. Brystingb aCentre for Development and the Environment, University of Oslo, NO-0317 Oslo, Norway; bCentre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, NO-0316 Oslo, Norway; cMinistry of Agriculture, Eastern Equatoria State, Torit, South Sudan; dCollege of Applied and Industrial Sciences, Juba University, Juba, South Sudan; eNoragric, Norwegian University of Life Sciences, NO-1432 Aas, Norway; fInternational Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, India; gDepartment of Agronomy, Kansas State University, Manhattan, KS 66506; and hUWA Institute of Agriculture, University of Western Australia, Crawley, WA 6009, Australia Edited* by Hans R. Herren, Millennium Institute, Arlington, VA, and approved August 18, 2014 (received for review January 27, 2014) Sorghum is a drought-tolerant crop with a vital role in the live- recombination of these types in different environments (2, 14, 15). lihoods of millions of people in marginal areas. We examined On the basis of morphology, Harlan and de Wet (16) classified genetic structure in this diverse crop in Africa. On the continent- sorghum into five basic and 10 intermediary botanical races (16). wide scale, we identified three major sorghum populations (Central, The race “bicolor” has small elongated grains, and, because of the Southern, and Northern) that are associated with the distribution “primitive” morphology, it is considered the progenitor of more of ethnolinguistic groups on the continent.
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