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Article

An Evaluation of Kernel Zinc in Hybrids of Elite Quality Protein Maize (QPM) and Non-QPM Inbred Lines Adapted to the Tropics Based on a Mating Design

1
Department of Agronomy, Iowa State University, Ames, IA 50011, USA
2
International Maize and Wheat Improvement Center (CIMMYT), Mexico D.F. 06600, Mexico
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(5), 695; https://doi.org/10.3390/agronomy10050695
Received: 24 March 2020 / Revised: 5 May 2020 / Accepted: 8 May 2020 / Published: 13 May 2020
(This article belongs to the Special Issue Quantitative and Molecular Genetics in Crop Improvement Conditions)
Genetic improvement of maize with elevated levels of zinc (Zn) can reduce Zn deficiency among populations who rely on maize as a staple. Inbred lines of quality protein maize (QPM) and non-QPM with elevated Zn levels in the kernel have been identified. However, information about the optimal strategy to utilize the germplasm in breeding for high-Zn concentration is lacking. As a preliminary step, this study was conducted to ascertain the potential of QPM, non-QPM, or a combination of QPM and non-QPM hybrids for attaining desirable Zn concentration. Twenty elite inbreds, 10 QPM and 10 non-QPM, were crossed according to a modified mating design to generate hybrids, which were evaluated in four environments in Mexico during 2015 and 2016 in order to evaluate their merits as parents of hybrids. The highest mean values of Zn were observed when high-Zn QPM lines were crossed with high-Zn non-QPM lines. Hybrids with high Zn and grain yield were identified. General combining ability (GCA) effects for Zn concentration were more preponderant than specific combining ability (SCA) effects, suggesting the importance of additive gene action for the inheritance of Zn. View Full-Text
Keywords: genetics; maize; zinc; QPM; kernels; combining ability; breeding genetics; maize; zinc; QPM; kernels; combining ability; breeding
MDPI and ACS Style

Mageto, E.K.; Lee, M.; Dhliwayo, T.; Palacios-Rojas, N.; San Vicente, F.; Burgueño, J.; Hallauer, A.R. An Evaluation of Kernel Zinc in Hybrids of Elite Quality Protein Maize (QPM) and Non-QPM Inbred Lines Adapted to the Tropics Based on a Mating Design. Agronomy 2020, 10, 695. https://doi.org/10.3390/agronomy10050695

AMA Style

Mageto EK, Lee M, Dhliwayo T, Palacios-Rojas N, San Vicente F, Burgueño J, Hallauer AR. An Evaluation of Kernel Zinc in Hybrids of Elite Quality Protein Maize (QPM) and Non-QPM Inbred Lines Adapted to the Tropics Based on a Mating Design. Agronomy. 2020; 10(5):695. https://doi.org/10.3390/agronomy10050695

Chicago/Turabian Style

Mageto, Edna K., Michael Lee, Thanda Dhliwayo, Natalia Palacios-Rojas, Félix San Vicente, Juan Burgueño, and Arnel R. Hallauer. 2020. "An Evaluation of Kernel Zinc in Hybrids of Elite Quality Protein Maize (QPM) and Non-QPM Inbred Lines Adapted to the Tropics Based on a Mating Design" Agronomy 10, no. 5: 695. https://doi.org/10.3390/agronomy10050695

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