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Fig. 2. Landrace ancestors in spring bread wheat cultivars released by developing countries, 1966 through 1997. Calculations based on CIMMYT 1997 Global Wheat Impacts survey data and pedigree information in CIMMYT Wheat Pedigree Management System. Data were available for 1162 (included here) of the 1749 spring bread wheat cultivars recorded (in the survey data) as released during these years. Coverage is less complete for China and for wheats released in the last few years.
