Читать книгу Dry Beans and Pulses Production, Processing, and Nutrition онлайн

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Source: Original images by author, K. A. Cichy.

Iron biofortification has been a major bean breeding initiative since 2003, primarily implemented through the International Center for Tropical Agriculture in collaboration with various national programs. HarvestPlus set iron biofortification targets at increases of at least 22 mg/kg above locally consumed varieties (Andersson et al. 2017). To date, at least 60 high iron bean varieties have been released in over 12 countries in eastern and southern Africa and Latin America (Saltzman et al. 2017; Beebe 2020). Breeding progress has been made largely through phenotypic selection for increased levels of raw seed iron concentrations. The large variability for iron and zinc levels in dry bean germplasm has facilitated breeding progress. Screening of the CIAT core collection of 1072 bean lines of Mesoamerican, Andean, and mixed‐origin beans has revealed genetic variability for seed Fe and Zn concentrations ranging from 34 to 96 mg/kg and 21 to 60 mg/kg, respectively (Islam et al. 2002). Iron concentrations as high as 152 mg/kg have been reported for some bean genotypes from race Chile (Paredes et al. 2009).