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




Stability Performance of Inductively Coupled Plasma Mass Spectrometry-Phenotyped Kernel Minerals Concentration and Grain Yield in Maize in Different Agro-Climatic Zones - Download this document for free, or read online. Document in PDF available to download.

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.



Author: Mallana Gowdra Mallikarjuna, Nepolean Thirunavukkarasu, Firoz Hossain, Jayant S. Bhat, Shailendra K. Jha, Abhishek Rathore, Pawan

Source: http://plos.srce.hr/



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