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

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Relation http://oar.icrisat.org/9034/
http://dx.doi.org/10.1371/journal.pone.0139067
 
Title Stability Performance of Inductively Coupled Plasma Mass Spectrometry-Phenotyped Kernel Minerals Concentration and Grain Yield in Maize in Different Agro-Climatic Zones
 
Creator Mallikarjuna, M G
Thirunavukkarasu, N
Hossain, F
Bhat, J S
Jha, S K
Rathore, A
Agrawal, P K
Pattanayak, A
Reddy, S S
Gularia, S K
Singh, A M
Manjaiah, K M
Gupta, H S
 
Subject Maize
Climate change
 
Description 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.
 
Publisher Public Library of Science
 
Date 2015-09-25
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/9034/1/journal.pone.0139067.pdf
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