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GENETIC ANAALYSIS OF MORPHOLOGICAL, PHYSIOLOGICAL AND YIELD ATTRIBUTES IN SESAME ( Sesamum indicum L. )

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Title GENETIC ANAALYSIS OF MORPHOLOGICAL, PHYSIOLOGICAL AND YIELD ATTRIBUTES IN SESAME ( Sesamum indicum L. )
 
Creator VANISRI, SATTURU
 
Contributor RANGANATHA, A.R.G
 
Subject biological phenomena, diseases, viruses, livestock, polysaccharides, proteins, adjuvants, polymers, elisa, wells
 
Description To understand the pattern of variability for
yield, yield components and important physiological
characters like LAI and NAR besides character association
with yield and direct and indirect effects of
different yield components on yield of 29 genotypes
were studies at College Farm, College of Agriculture,
Rajendranagar, Hyderabad, while another experiment
comprising of six parents and their 15 hybrids were
studied to understand gene action, combining ability
and heterosis.
The studies revealed high variability for LAI,
NAR, height to the first branch, height to the first
capsule, number of primaries, number of secondaries,
number of productive capsulesand abortive capsules.
High heritab~lity was observed for NAR, LAI besides
number of productive capsules. Heritability for seed
yield and harvest index was also high with moderate
genetic advance. High genetic advance as percentage of
mean for capsules on primaries, number of secondaries,
height to the first capsule, LAI and NAR indicated the
possibility for genetic manipulation. Moderate genetic
advance was observed for plant height, number of primaries,
number of productive capsules, weight of the
seeds per capsule and oil yield per plant. Moderate. GCV and moderate genetic advance were observed for seed
yield indicated the scope for further improvement
through biparental mating system. From path analysis,
it is evident that number of seeds per capsule had
direct effect on seed yield with significant possitive
correlation. Among the 29 genotypes DORS-101, DORS-
106, DORS-151, DORS-177 and TC-25 were identified as
potential parents for the improvement of the crop in
the hybridization programme.
The genetic analysis through diallel design
(Experiment-II) revealed significant gca and sea variances
indicating the importance of additive and nonadditive
gene action. However gca/sca ratios indicated
the predominance of additive gene action for most of
the morphological characters like days to maturity,
days to initial flowering, number of primaries, height
to the first capsule, plant height and the yield
related characters viz., number of abortive capsules,
number of capsules on main stern and oil per cent.
While non- additive gene action is predominant in
number of capsules on primaries, number of productive
capsules per plant, number and weight of the seeds- per
capsule, seed yield per plant, harvest index and oil
yield per plant. Biparental mating, crossing inter se
among the superior selects followed by pedigree method
of breeding will capitalize both additive and nonadditive
gene actions involved.
~~performance and gca effects of parental
lines over all characters studied enabled to identify
the best general combiners viz., Gouri, Tapi and DORS-
162. Per se. performance, sea effects and heterosis
were considered together over all the characters including
seed yield, the cross combinations Tapi x DORS-103
and Tapi x DORS-162 were preferred in the order of
their relative importance. The significant and high
heterosis observed for seed yield per plant in these
hybrids might be utilized for its exploitation both by
conventional and heterosis breeding methods.
Considering the above, an ideal plant type is
being visualized for the improvement of seed yield in
Sesame, Keeping in view of the importance of various
characters viz., days to initial flowering, maturity,
basal branching, number of capsules per plant, number
of seeds per capsules, 1000-seed weight and oil yield
per plant.
 
Date 2017-01-20T10:14:51Z
2017-01-20T10:14:51Z
1992
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/97247
 
Language en
 
Relation D3937;
 
Format application/pdf
 
Publisher ANDHRA PRADESH AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD