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GENETIC ANALYSIS FOR YIELD AND YIELD CONTRIBUTING TRAITS IN OKRA [Abelmoschus esculentus (L.) Moench] OVER ENVIRONMENTS

KrishiKosh

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Title GENETIC ANALYSIS FOR YIELD AND YIELD CONTRIBUTING TRAITS IN OKRA [Abelmoschus esculentus (L.) Moench] OVER ENVIRONMENTS
 
Creator PATIL, SUNIL S.
 
Contributor DESAI, D.T.
 
Subject crop residues, livestock, organic compounds, nitrogen, inorganic compounds, animal husbandry, biological phenomena, concentrates, wheats, yields
 
Description In the present investigation, information on the
magnitude of heterosis, combining ability and its
interactions with locations, G x E interactions and
stability parameters was obtained for fruit yield per plant
and its related components following half diallel mating
design involving eight varieties/strains of okra
(Abelmoschus esculentus (L.) Moench). The eight parents
and their 28 F1s with one standard check were tested for
twelve characters under four environments viz., summer-
2011 (E1), kharif-2011 (E2), rabi-2011-12 (E3) and
summer-2012 (E4) at College Farm and R.H.R.S. Farm,
Navsari Agricultural University, Navsari in a randomized
block design with three replications.
Abstract
Significant difference existed among the
parents and hybrids, indicating considerable genetic
variation among these genotypes.
Highly significant positive heterosis over mid
parent, better parent and standard check for fruit yield
and its component characters suggested that there is an
ample scope of exploiting heterosis commercially and
possibility of isolating desirable segregants. The cross
JOL-09-8 x JOL-08-16 manifested highest heterosis over
standard check with high fruit yield per plant followed by
crosses JOL-09-7 x JOL-09-8 and JOL-09-7 x JOL-55-3.
Heterotic effect for fruit yield per plant was found to be
associated with heterosis for its related traits in majority
of the crosses.
Combining ability analysis revealed that both
additive and non-additive variances were significant for
fruit yield per plant and its related traits indicating their
involvement in the expression of various traits. The
magnitude of non-additive variance was higher for fruit
yield per plant and its contributing traits indicating
predominant role of non-additive gene action in the
inheritance of the traits. Among the parents JOL-09-7,
JOL-09-8 and JOL-08-16 were good general combiners for
fruit yield and most of the yield components. The parents
viz., JOL-09-8 and AOL-09-17 were good general
combiners for earliness and tall plant stature. The cross
JOL-09-7 x JOL-55-3, JOL-09-8 x JOL-08-16 and
Abstract
AOL-09-17 x AOL-09-13 showed sca effects of higher
order for fruit yield and majority of yield components.
Expression of heterosis for fruit yield and its
components was related to gca effect of parents. High
heterotic crosses for various characters involved at least
one parent with high gca effect. A fairly close and
positive association between per se performance and
combining ability in both parents and hybrids was
observed for almost all traits taken under study. The
crosses which depicted high sca effects for fruit yield and
its attributes were in general, combination of parents
with good x good, good x average, good x poor, average
x average, average x poor and poor x poor general
combiners.
Highly significant G x E interaction for majority
of the traits was found which indicated differential
response of genotype to varied environments. Both linear
and non-linear components were found important in
building up total G x E interactions. None of the parents
and hybrids was found average stable for all the
characters studied across environments. Non-additive
effect played significant role in the inheritance of fruit
yield and its components. Therefore, it is suggested that
bi-parental mating system could be followed for
accumulation of additive gene effect and breaking
undesirable linkage in order to exploit both additive and
non additive gene effects.
 
Date 2016-05-02T10:27:22Z
2016-05-02T10:27:22Z
2013-03
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65716
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari