Genotypic differences in concentration and bioavailability of kernel iron in tropical maize varieties grown under field conditions

Oikeh, S.O. and Menkir, A. and Maziya-Dixon, B. and Welch, R.M. and Glahn, R.P. (2003) Genotypic differences in concentration and bioavailability of kernel iron in tropical maize varieties grown under field conditions. Journal of Plant Nutrition, 26 (10-11). pp. 2307-2319.

[img] PDF
Restricted to ICRISAT researchers only

Abstract

Forty-nine late-maturing tropical elite maize cultivars were grown in a lattice design with two replications in three locations representing three agroecologies in West and Central Africa to identify the cultivars with high levels of kernel Fe. Bioavailable Fe was evaluated for some cultivars selected for high Fe concentration in kernel and improved agronomic traits using an in vitro digestion/Caco-2 cell model. Significant differences in kernel Fe and Zn concentration were observed among the cultivars (P<0.001). Kernel Fe levels ranged from 16.8 to 24.4 mg kg-1, while kernel Zn levels ranged from 16.5 to 24.6 mg kg-1. The environment did not have a significant effect on kernel Fe and Zn levels, but genotype by environment interaction was highly significant. The genetic component accounted for 12% of the total variation in kernel Fe and 29% for kernel Zn levels. Kernel Fe was positively correlated with kernel Zn (R2=0.51, P<0.0001). Significant differences in Fe bioavailability were detected among selected Fe-rich cultivars grown at one location. The mean bioavailable Fe ranged between 30% below to 88% above the reference control cultivar (Entry 22)

Item Type: Article
Author Affiliation: U.S. Plant, Soil, and Nutrition Laboratory, USDA/ARS, Cornell University, Ithaca, New York, USA
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Maize
Depositing User: Mr B Krishnamurthy
Date Deposited: 21 Mar 2011 17:41
Last Modified: 21 Mar 2011 17:41
Official URL: http://dx.doi.org/10.1081/PLN-120024283
URI: http://eprints.icrisat.ac.in/id/eprint/1662

Actions (login required)

View Item View Item
EPrints Logo
eprints is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.