Development of double haploid lines for enhanced micronutrient content in rice
2010
Aldemita, V., Manito, C., Inabangan, A., Dizon, T., Lopena,V., Grewal, D., Virk, P., International Rice Research Inst., Los Baños, Laguna 4031 (Philippines)
Among the major nutritional problems common in rice-consuming countries are: protein-energy malnutrition, and iron, zinc, iodine and vitamin A deficiencies. It is estimated that more than 3 billion people in the developing world are iron deficient. Since rice is the staple food for more than half of the world's population even a small increase in its nutritive value would be highly beneficial for human health. Several strategies including supplementation and fortification programs are continuing to address this problem. Recently, breeding staples with high micronutrient content dubbed 'biofortification' has evolved as a new strategy to address micronutrient malnutrition. To accelerate the development of elite lines with increased micronutrient content as breeding program based on anther culture derived doubled haploids (DH). More than 1500 DH lines were field evaluated initiated from 10 single crosses and back crosses involving popular rice varieties and the donor lines. Selected DH lines are being field evaluated during DS 2010. Four DH population have been genotyped using SSR primers and putative QTLs for zinc have been identified. The current status to breed micronutrients enriched rice lines will be presented.
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