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STUDIES ON GENETIC VARIABILITY, CHARACTER ASSOCIATIONS AND SOME SEED TECHNOLOGY ASPECTS IN DIVERSE GENOTYPES OF SORGHUM ( Sorghum bicolor (l.) Moench)

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Title STUDIES ON GENETIC VARIABILITY, CHARACTER ASSOCIATIONS AND SOME SEED TECHNOLOGY ASPECTS IN DIVERSE GENOTYPES OF SORGHUM ( Sorghum bicolor (l.) Moench)
 
Creator NARASIMHA, M
 
Contributor BALAKRISHNA REDDY, M
 
Subject STUDIES, GENETIC, VARIABILITY, CHARACTER, ASSOCIATIONS, SEED, TECHNOLOGY, ASPECTS, DIVERSE, GENOTYPES, SORGHUM
 
Description The field and laboratory investigations
relating to "Studies on genetic variability character
associations and some seed technology aspects in
diverse genotypes of sorghum (Sorghum bicolor (L.)
Moench) were undertaken at National Research Centre for
Sorghum (NRCS) and Andhra Pradesh Agricultural
University, Rajendranagar, Hyderabad. The field
experiment was conducted using twenty four sorghum
genotypes consisting of twelve varieties and twelve
hybrids in a randomised complete Qlock design with
three replications during kharif, 1989.
The objectives of the experiment were (1) to
study the mean performance of vari~ies and hybrids of
sorghum {2) to study the genet!b variability and
character association between yield and yield
contributing characters of sorghum-· genotypes ( 3) to
find out the recovery percentages of recommended
(N.s.c. recommendations) · seed grades of sorghum varieties
from the obtained produce and (4) to find out. the
seedl'ing vigour evaluation of different seed grades of
varieties.
The mean performance of hybrids was found to
~e superior when compared to varieties in respect to
yield and yield components. In varieties and hybrids
genetic variability for plant height and number of
grains per panicle were common. In hybrids variability
for grain yield per panicle and panicle weight-was high
may be due to the heterotic effect. Whereas in varieties
total dry matter per plant was high, and it may
be due to poor harvest index.
High heritabilities in the broad sense in
varieties and hybrids were recorded for plant height,
dry matter yield and grain yield per plant. In varieties
internodal length also had high heritability. With
regard to hybrids leaf area, panicle weight, lOOO_grain
weight, leaf length a~so had high peritability.
Character association in varieties and hybrids
in respect of grain yield per plant were significant
for panicle weight, number of grains per panicle. In
varieties total dry matter per plant, leaf area and
leaf width also had significant association with grain
yield per plant. On contrary, in hybrids panicle
length and 1000 grain weight had significant
association with grain yield per plant.
Path coefficient analysis revealed that in
both varieties and hybrids, number of grains per
panicle, panicle weight and leaf area and 1000 grain
weight had direct effect on grain yield per plant. The
deviations in varieties were plant height, leaf width,
to~al . dry matter yield per plant. In hybrids panicle
length also had direct effect on grain yield.
From the study of character associations and
their partitioning effects in varieties and hybrids it
was found that panicle weight is the best phenotypic
selection index in sorghum.
These results further indicate that the
ties contained more "of dry matter and less grain
per plant. As such similar genotypes can be
utilized for forage production.
varieyield
better
Based on these studies the ideotype of sorghum
for higher grain production can also be visualised.
They should be dwarf to medium tall with less number of·
broad leaves may be
tate more leaf area
chances · for mutual
should also possess
more number of ·grain
with semi erect nature to faciliexpos~
re to sun light, and less
shading of leaves. These plants
big panicles (sink) to accommodate
of higq test weight.
~
Most of the varieties recorded maximum seed
recovery on 3.50 mm sieve size. The 1000 seed weight,
germination percentage, seedling length and seedling
vigour increased with increase in seed size.
 
Date 2016-08-19T13:24:44Z
2016-08-19T13:24:44Z
1990
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73011
 
Language en
 
Relation D3426;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD.