Indian Society of Genetics & Plant Breeding

The effect of genotype x pollination mode interaction on kernel modification in quality protein maize (QPM) genotypes

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Kernel vitreousness or texture is one of the most important
prerequisites for successful adoption of the Quality
Protein Maize (QPM) genotypes by the farmers. The
present study was carried out to analyze in detail the
effects of pollination mode (controlled- versus openpollination) on different kernel attributes (endosperm
modification, crown modification and ear appearance) in
a set of QPM inbred lines and their experimental crosses.
QPM genotypes were found to differ significantly with
respect to kernel modification, indicating genetic
heterogeneity for endosperm modifier genes. Analysis of
ears obtained from different pollination modes indicated
significant interaction of the genotypes with the pollination
mode, suggesting the importance of the source of pollen
and its genetic constitution in conferring the kernel
texture. The study also demonstrates that the data derived
using controlled-pollination could be more reliable than
those using the open-pollination mode for analyzing the
effects of complementation of endosperm modifier genes
in QPM cross combinations. Ascertaining the kernel
modification potential of the QPM genotypes would aid in
proper selection of genotypes during QPM breeding.

Keywords: Endosperm modification, QPM, maize, pollination mode, interaction effects


Year: 2008
Volume: 68
Issue: 2
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906


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