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STUDIES ON GENETIC DIVERSITY IN SESAMUM (Sesamum indicum L.)

KrishiKosh

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Title STUDIES ON GENETIC DIVERSITY IN SESAMUM (Sesamum indicum L.)
 
Creator SHIVAKUMARA, H
 
Contributor SUJATHA, M
 
Subject planting, sowing, genotypes, yields, developmental stages, genetics, oilseeds, oils, biological phenomena, sesamum indicum
 
Description In the present investigation, fifty nine genotypes of sesame were evaluated for
genetic divergence, genetic variability, character association and path coefficient
analysis. The experiment was laid out in a randomized block design with three
replications during Rabi 2011, at college farm, college of agriculture, Rajendranagar,
Hyderabad.
Analysis of variance indicated the existence of significant genotypic differences for
all the ten characters. Among the genotypes studied GAG-15A, YLM-17, YLM-11,
VS07-023, SVPR-1 and CO-1 showed high mean performance for seed yield as well as
for most of the yield components.
Genetic divergence studies by Mahalanobis’s D2 analysis indicated the existence of
significant diversity in fifty nine sesame genotypes which were grouped into eight
clusters. The characters oil content, number of capsules per plant, seed yield per plant
and 1000-seed weight contributed maximum towards genetic divergence. The clusters
V, VI, VII and VIII recorded high mean values for seed yield and they were highly
divergent from each other. Hence, crosses made between genotypes selected from
clusters V, VI, VII and VIII are recommended to obtain increased productivity as well
as to exploit maximum heterosis.
The studies of genetic variability revealed high phenotypic and genotypic
coefficients of variation, heritability and genetic advance as per cent of mean for
number of capsules per plant, plant height, number of effective primaries per plant and
1000-seed weight indicating that simple selection can be practiced for improving these
characters.
Character association studies indicated the highly significant positive correlation of
number of capsules per plant, number of days to 50% maturity, number of effective
primaries per plant, plant height, number of days to 50% flowering, 1000-seed weight,
number of seeds per capsule, oil content and capsule length with seed yield and also
among themselves. Hence, improvement of these characters would simultaneously
improve the seed yield. Path coefficient analysis revealed that number of capsules per
plant, 1000-seed weight and number of effective primaries per plant were the important
attributes in formulating selection criterion for effective improvement of seed yield.
 
Date 2016-06-14T10:03:29Z
2016-06-14T10:03:29Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67315
 
Language en
 
Relation D9120;
 
Format application/pdf
 
Publisher ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY