Indian Society of Genetics & Plant Breeding


Genotype-environment interaction for grain iron and zinc concentration in recombinant inbred lines of a bread wheat (Triticum aestivum L.) cross

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A set of 306 recombinant inbred lines (RILs) along with the
two parents and hitherto popular wheat variety in India,
PBW 343, were evaluated in three environments over two
years for grain iron (Fe) and zinc (Zn) concentration.
Considerable genetic variation for both grain iron and zinc
concentration exists. The environment effect was the most
important source of variation for grain Fe and Zn
concentration, explaining 37.42% and 57.78% of the total
sum of squares respectively. Genotype-environment
interaction (G x E) for Fe and Zn accounted for 29.46% and
23.24% of the total sum of squares, respectively. The
magnitude of G x E interaction was relatively high. High
heritabilities were observed for iron (0.81) and zinc (0.71)
concentrations reflecting non-crossover type of interaction.
The positive and moderately high correlation (0.677**)
between Fe and Zn concentration suggest good prospect
of simultaneous improvement of both the micronutrients.
Additive main effects and multiplicative interaction biplot
and environmental indices indicated the most favorable
environment for Fe to be at Delhi, which was the second
most favorable environment after Samastipur in Bihar for
Zn. A poor environment for grain Fe and Zn accumulation
was at Pantnagar. Four stable RILs each for grain Fe and
grain Zn concentration were identified.

Keywords: Grain Fe and Zn concentration, genotypeenvironment interactions, AMMI analysis, Triticum aestivum


Year: 2015
Volume: 75
Issue: 3
Article DOI: 10.5958/0975-6906.2015.00048.6
Print ISSN: 0019-5200
Online ISSN: 0975-6906


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