EFFECT OF POLLEN BLEND ON SEED YIELD AND QUALITY OF SUNFLOWER (Helianthus annuus L.)
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Date
2003
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ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD
Abstract
The present study comprising of nine sunflower genotypes (four hybrids, three
inbreds and two open pollinated varieties) were sown in a randomized block design
replicated thrice at College Farm, ANGRAU, Hyderabad during rabi, 2002 to study
the effect of autogamy, gietenogamy, open pollination and pollen blend on seed yield
and other component traits of sunflower.
Analysis of variance revealed that, significant variation existed for different
pollination treatments, genotypes and their interactions for various characters studied.
Among the treatments, pollen blend treatment was regarded as the best treatment, due
to its enhanced seed setting rate and higher number of filled seeds per capitulum and
recorded higher accumulation of oil due to metaxenia effect. Competition among
developing achenes for nutrients lead to production of thin hulled seeds with higher
kernel to hull ratio, thereby recorded high kernel proportion in achene. Higher
seedling vigour index was recorded by the heterozygous and heterogenous seedlings
of pollen blend and open pollination treatments. On the other hand, pollen blend
recorded reduced test weight, volume weight, hull weight and kernel weight due to
competition among developing achenes. Autogamy studies revealed that hybrids
recorded higher autogamy and self compatibility followed by inbreds and open
pollinated varieties.
The correlation studies revealed that total number of seeds per capitulum,
number of filled seeds, seed setting percent, oil content and kernel to hull ratio
recorded significant positive association with seed yield. Oil content showed
significant, negative correlation with test weight and hull content. From the present
study it can be concluded that the need of the hour is to develop synthetics, varietal
mixtures and blends, which can yield on par with hybrids.
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Keywords
EFFECT, POLLEN BLEND, SEED, YIELD, QUALITY, SUNFLOWER