Stability Performance of Inductively Coupled Plasma Mass Spectrometry-Phenotyped Kernel Minerals Concentration and Grain Yield in Maize in Different Agro-Climatic Zones

Mallikarjuna, M G and Thirunavukkarasu, N and Hossain, F and Bhat, J S and Jha, S K and Rathore, A and Agrawal, P K and Pattanayak, A and Reddy, S S and Gularia, S K and Singh, A M and Manjaiah, K M and Gupta, H S (2015) Stability Performance of Inductively Coupled Plasma Mass Spectrometry-Phenotyped Kernel Minerals Concentration and Grain Yield in Maize in Different Agro-Climatic Zones. PLoS ONE. 01-24. ISSN 1932-6203

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Abstract

Deficiency of iron and zinc causes micronutrient malnutrition or hidden hunger, which severely affects ~25% of global population. Genetic biofortification of maize has emerged as cost effective and sustainable approach in addressing malnourishment of iron and zinc deficiency. Therefore, understanding the genetic variation and stability of kernel micronutrients and grain yield of the maize inbreds is a prerequisite in breeding micronutrient-rich high yielding hybrids to alleviate micronutrient malnutrition. We report here, the genetic variability and stability of the kernel micronutrients concentration and grain yield in a set of 50 maize inbred panel selected from the national and the international centres that were raised at six different maize growing regions of India. Phenotyping of kernels using inductively coupled plasma mass spectrometry (ICP-MS) revealed considerable variability for kernel minerals concentration (iron: 18.88 to 47.65 mg kg–1; zinc: 5.41 to 30.85 mg kg–1; manganese: 3.30 to17.73 mg kg–1; copper: 0.53 to 5.48 mg kg–1) and grain yield (826.6 to 5413 kg ha–1). Significant positive correlation was observed between kernel iron and zinc within (r = 0.37 to r = 0.52, p < 0.05) and across locations (r = 0.44, p < 0.01). Variance components of the additive main effects and multiplicative interactions (AMMI) model showed significant genotype and genotype × environment interaction for kernel minerals concentration and grain yield. Most of the variation was contributed by genotype main effect for kernel iron (39.6%), manganese (41.34%) and copper (41.12%), and environment main effects for both kernel zinc (40.5%) and grain yield (37.0%). Genotype main effect plus genotype-by-environment interaction (GGE) biplot identified several mega environments for kernel minerals and grain yield. Comparison of stability parameters revealed AMMI stability value (ASV) as the better representative of the AMMI stability parameters. Dynamic stability parameter GGE distance (GGED) showed strong and positive correlation with both mean kernel concentrations and grain yield. Inbreds (CM-501, SKV-775, HUZM-185) identified from the present investigation will be useful in developing micronutrient-rich as well as stable maize hybrids without compromising grain yield.

Item Type: Article
Divisions: RP-Grain Legumes
CRPS: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Maize; Inbred strains; Kernel methods; Manganese; Malnutrition; Phenotypes; Micronutrient deficiencies; Plant breeding
Subjects: Others > Maize
Others > Climate change
Depositing User: Mr Ramesh K
Date Deposited: 05 Oct 2015 05:56
Last Modified: 05 Oct 2015 05:56
URI: http://oar.icrisat.org/id/eprint/9034
Official URL: http://dx.doi.org/10.1371/journal.pone.0139067
Projects: UNSPECIFIED
Funders: ICARNPTC on Functional Genomics
Acknowledgement: This work was supported by the ICARNPTC on Functional Genomics (Maize component: 21–22) and the DBT, GoI Project on Development of micronutrient enriched maize through molecular breeding -Phase II (102/IFD/SAN/4455/2011-12). MGM is thankful to the Department of Science & Technology, Government of India, for the INSPIRE Fellowship (DST/INSPIRE/2011/IF110504) to carry out the doctoral degree programme.
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