Improving iron and zinc value of rice for human nutrition

Gregorio G.B., Senadhira D., Htut T.. 1999. Improving iron and zinc value of rice for human nutrition. Agriculture et Développement (23) : 77-81.

Titre français : Amélioration de la teneur en fer et en zinc du riz pour l'alimentation humaine / Titre espagnol : Mejoramiento del contenido en hierro y zinc del arroz para la alimentación humana

Résumé : Micronutrient deficiency 'hidden hunge' + affects more than 3.7 billion people worldwide, predominantly women and children because of their physiological needs. Iron and zinc deficiencies cause impaired immune function, complications in pregnancy and childbirth, poor child growth and learning ability, and reduce labor productivity. In 1992, IRRI began to examine the effect of certain soil characteristics on the iron content in the grain and was expanded in 1995 to include zinc and collaboration with university of Adelaide, Australia for mineral analysis. Germplasm screening showed large genetic variation for Fe and Zn in brown rice. Common cultivars contain about 12mg kg-1 of iron and 25mg kg-1 Zn. Some traditional varieties have doubled these amounts. Genetics of high Fe trait showed the importance of additive and dominance gene action but less affected by environment. Moreover three QTLS for high Fe trait were tagged in rice chromosomes. High iron and zinc traits can be combined with improved agronomic traits. IRRI identified improved rice with good yielding ability and high concentration of iron and zinc in the grain. Because of the high consumption of rice in developing countries, the extra iron and zinc would have meaningful impact on human nutrition and health

Mots-clés Agrovoc : riz, Oryza, teneur en éléments minéraux, carence minérale, alimentation humaine, nutrition humaine, fer, zinc, oligo-élement, sélection, relation plante sol, carte génétique, variété, grain

Classification Agris : Q04 - Composition des produits alimentaires
S01 - Nutrition humaine - Considérations générales

Auteurs et affiliations

• Gregorio G.B., IRRI [International Rice Research Institute] (PHL)
• Senadhira D., IRRI [International Rice Research Institute] (PHL)
• Htut T., IRRI [International Rice Research Institute] (PHL)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/476190/)

Métriques

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