GENETIC STUDIES FOR YIELD AND QUALITY TRAITS IN LINSEED (Linum usitatissimum L.)
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Date
2015
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Birsa Agricultural University, Kanke, Ranchi, Jharkhand
Abstract
The present investigation was carried out with a set of eight
varieties of linseed and their twenty eight F1’S obtained through diallel
crossing excluding reciprocals. The eight parents, their 28 F1’S and the
28 respective F2’S were grown in a randomized block design during rabi
season of 2012 and studied for fifteen quantitative characters.
The analysis of variance showed highly significant differences
among the genotypes for all the characters studied except days to
maturity in F1’S as well as F2’S. The highest values of phenotypic as well
as genotypic variances were observed in number of capsules per plant
for parents as well as crosses in F1’S, whereas in F2’S it was found to be
maximum in linolenic acid percent in crosses, followed by number of
capsules per plant. The genetic coefficient of variance was high in
number of capsules per plant, Linolenic acid content and technical
height in F1’S , whereas, in F2’S it was found to be maximum in steric acid
followed by number of capsules per plant.
The highest value of heritability was observed in linoleic acid
content among parents whereas among crosses it was the highest in
case of linolenic acid in F1'S.However, in F2’S it was found to be highest in
oleic acid and linolenic acid respectively for parents and crosses. Genetic
advance was observed to be the highest in number of capsules per plant
for parents and linolenic acid for crosses in F1 as well as F2 generation.
Genetic advance expressed as percentage of mean was highest in steric
acid percent for parent and seed yield per plant for crosses in F1 while in
F2 it was maximum in steric acid both for parents as well as crosses.
Heterosis for seed yield per plant was found to be highest in
JLS-9 X KL-221 over mid, better as well as over standard
variety.Whereas, inbreeding depression in F2 for seed yield per plant was
found to be highest in the cross JLS-9 X RLC-76.
The combining ability studies indicated that both additive and non
additive genetic components were involved in determining the expression
of the characters included in the present study but non additive type of
gene action predominated in all these characters. LMS-149-4 was found
as good general combiner for seed yield per plant as well as oil content.
However, the cross JLS-9 X KL-221 was the best specific combiner for
seed yield per plant and Meera X KL-221 for oil content.
The result of antioxidant assay revealed that LMS-153-3 was the
best performer, whereas in F1s as well as F2s the cross LMS-149-4 X
KL-221 performed best but none of the samples was found to perform
better than standard Quercetin.
The per se performance of the parents was an adequate measure
of general combining ability and parents may be selected on the basis of
per se performance in breeding for character improvement. Higher the
inhibition percentage higher will be the antioxidant potential. The traits
which perform better can be utilized to develop natural antioxidants.
Methods which exploit non–additive gene action such as development of
hybrids using male sterility or both additive and non-additive gene
action such as reciprocal recurrent selection may be suggested for
genetic improvement of the character.
Description
GENETIC STUDIES FOR YIELD AND QUALITY TRAITS IN LINSEED (Linum usitatissimum L.)
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