Influence of Pollination Methods on Seed Quality Maintenance in Open Pollinated Varieties of Maize (Zea mays L.)
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Date
2005
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UAS Dharwad
Abstract
An investigation was carried out to determine the effect of pollination methods on
seed quality in open pollinated varieties of maize. It was observed that among pollination
methods isolated half-sib nursery mating and reciprocal full-sib mating were significantly
superior over other methods with respect to maintenance of genetic purity in maize open
pollinated varieties. There was no significant effect on germination, field emergence, shoot
length, root length, seedling dry weight, seedling vigour index, germination under cold test,
electrical conductivity of seed leachate, seed yield and yield components viz., ear length, ear
girth and 100-seed weight due to pollination methods in open pollinated varieties of maize.
Pollination methods did not show any significant effect on germination, seedling
vigour index and field emergence in open pollinated varieties of maize due to accelerated
aging. However, irrespective of the pollination methods, accelerated aging showed significant
effect on seed germination, shoot length, root length, seedling dry weight, seedling vigour
index, electrical conductivity of seed leachate and field emergence. Significant reduction in
seed quality parameters was observed with the increase in the period of accelerated aging.
Seed subjected to accelerated aging maintained a minimum of 90 per cent germination upto
eight days of aging then after it declined below the minimum seed certification standards for
germination.
The genetic variability parameters with respect to growth traits viz., plant height, ear
height, maturity traits viz., days to 50% pollen shedding, 50% silking and 50% dry husk, seed
yield, yield components and seed quality parameters did not show any significant variability
in maize open pollinated varieties due to pollination methods.
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Seed Science & Tech