GENETIC ANALYSIS OF YIELD AND YIELD COMPONENTS IN WHITE SEEDED SESAME (Sesamum indicum L.)
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Date
2006
Authors
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ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
Abstract
The present investigation on “Genetic analysis of yield and yield
components in white seeded sesame (Sesamum indicum L.)” was undertaken
with six lines (GM-NIC-8181, GM-NIC-8261, GM-NIC-16332, GM-NIC-8227,
GM-NIC-16182 and GM-IS-349-1) and testers (Swetha Thil, RT-125, SVPR-1 and
JCS-402). During kharif, 2005 these parents were crossed in Line x Tester design at
College Farm, College of Agriculture, Rajendranagar, Hyderabad and 24 crosses
were affected. Further, parents (Lines and testers) and F1 hybrids were raised during
summer, 2006 with three replications and data was analysed and evaluated for
variability, heritability, genetic advance, heterosis and combining ability and they
were studied for seed yield and yield components.
The studies of genetic variability revealed moderate phenotypic, genotypic,
coefficients of variation, high heritability and genetic advance for number of
effective primaries/plant and number of effective capsules/plant indicating that
simple selection can be practiced for improving these characters.
The analysis of variance revealed significant differences among the
genotypes for all the traits studied. Further, the hybrids in general were high
yielding, compared to parents, high level of heterosis was noticed for number of
effective primaries per plant followed by number of effective capsules per plant and
seed yield. Heterosis for oil content was low to medium. Non-additive gene action
was found to be preponderant for seed yield, yield component traits in the present
investigation, favouring hybrid breeding programmes.
Study of mean performance, heterosis and sca effects revealed the
superiority of the hybrids, GM-NIC-8181 x SVPR-1, GM-NIC-8181 x RT-125,
GM-NIC-16182 x RT-125 and GM-NIC-8261 x SVPR-1 for seed yield per plant,
while the hybrids, GM-NIC-8261 x JCS-402, GM-NIC-16182 x RT-125 and
GM-IS-349-1 x RT-125 were showed superiority for oil content and cross,
GM-NIC-16182 x RT-125 and GM-NIC-16332 x Swetha Thil recorded high seed
yield coupled with high oil content. These heterotic hybrids may be exploited for
further utilization in transgressive and heterosis breeding programmes. High seed
yield coupled with high oil content hybrid combinations were found more desirable.
Description
Keywords
GENETIC, ANALYSIS, YIELD, COMPONENTS, WHITE, SEEDED, SESAME