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The Indian Journal of Genetics and Plant Breeding
Year : 2011, Volume : 71, Issue : 4
First page : ( 312) Last page : ( 319)
Print ISSN : 0019-5200. Online ISSN : 0975-6906.

Evaluation of single cross Quality Protein Maize (QPM) hybrids for kernel iron and zinc concentrations

Chakraborti M., Prasanna B. M.1,*, Hossain F., Singh Anju M.

Division of Genetics, Indian Agricultural Research Institute (IARI), New Delhi 110 012

1Present address: CIMMYT (International Maize and Wheat Improvement Center), United Nations Avenue, Gigiri, Nairobi 00621, Kenya

*Corresponding author's e-mail: b.m.prasanna@cgiar.org

Online published on 27 December, 2011.

Received:  May,  2011; Revised:  October,  2011; Accepted:  November,  2011.

Abstract

This study was carried out to ascertain the potential of Quality Protein Maize (QPM) genotypes for attaining desirable kernel iron (Fe) and zinc (Zn) concentrations. Forty two QPM hybrids generated out of seven inbreds varied significantly for kernel Fe and Zn concentrations, and grain yield at both Hyderabad and Delhi locations during 2007–2008. Considering both the micronutrient traits, DQPM-3 × DQPM-2 (Fe=38.46 mg/kg; Zn=39.92 mg/kg) at Hyderabad; and DQPM-7 × DQPM-3 (Fe=30.06 mg/kg; Zn=30.69 mg/kg) at Delhi were identified as the most promising cross combinations. Reciprocal effects for both the micronutrient traits were observed in some of the cross combination. The study revealed the influence of environment in determining the kernel micronutrient traits. Despite the presence of ‘dilution effect’, superior QPM hybrids with enriched kernel Fe and Zn concentrations were identified in the study. Kernel Fe and Zn concentrations were positively correlated, while no significant associations were found between either of the micronutrients with grain yield, suggesting the possibility of simultaneous improvement of both the kernel micronutrients without negatively impacting grain yield in the QPM hybrids.

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Keywords

Maize, biofortification, kernel micronutrient, iron, zinc, QPM.

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