Indian Society of Genetics & Plant Breeding

Inheritance of kernel quality attributes in quality protein maize (Zea mays L.)

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Nature and magnitude of gene actions were studied
employing Hayman’s component analysis, with 8 quality
protein maize (QPM) inbred lines and their 56 diallel set of
crosses including reciprocals. Kernels of each entry were
subjected to analysis of endosperm modification (EM),
endosperm protein content (EPR) and tryptophan content
(TRP). Significant difference was observed among
genotypes for the three traits. EM and TRP content exhibited
importance of both additive and dominance components,
whereas EPR exhibited prevalence of dominance gene
effects. Average degree of dominance revealed partial to
complete dominance for EM, whereas complete to overdominance
was exhibited by TRP, over the seasons. EPR
consistently showed over-dominance. The quality traits
among QPM lines were observed to be controlled by 1-3
dominant genes/gene blocks. Heritability estimates ranged
from 55-75.5% for EM, 32.2-51% for EPR and 35.3-60.6% for
TRP over three seasons.

Keywords: QPM, kernel quality, endosperm modification, gene action, heritability


Year: 2015
Volume: 75
Issue: 2
Article DOI: 10.5958/0975-6906.2015.00031.0
Print ISSN: 0019-5200
Online ISSN: 0975-6906


D. P. Chaudhary info_circle

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