Record Details

HETEROSIS AND COMBINING ABILITY ANALYSIS IN PIGEONPEA (Cajanus cajan (L.) Millsp.)

KrishiKosh

View Archive Info
 
 
Field Value
 
Title HETEROSIS AND COMBINING ABILITY ANALYSIS IN PIGEONPEA (Cajanus cajan (L.) Millsp.)
 
Creator RAMA DEVI, S
 
Contributor PRASANTHI, L
 
Subject planting, sowing, developmental stages, yields, crossing over, genetics, biological phenomena, pigeonpeas, heterosis, genotypes
PIGEONPEA, (Cajanus cajan (L.) Millsp.)
 
Description The present investigation comprising of eight parents of pigeonpea
(Cajanus cajan (L.) Millsp.) and 15 cross combinations developed through a
Line X Tester (5 X 3) crossing programme were evaluated for genetic
parameters, heterosis, combining ability, character association and path
coefficient analysis during kharif, 2010. The experiment was laid out in
Randomized Block Design with three replications at the Regional
Agricultural Research Station, Tirupati and observations were recorded on
14 characters.
Analysis of variance indicated the existence of significant differences
among the genotypes for all the characters. Among the parents, the lines
ICPL-15225 and LRG-41, the testers ICPL-8863 and ICPL-87119 and
among the crosses, ICPL-15225 X ICPL-8863, ICPL- 15225 X ICPL-87119
and LRG-41 X PRG-158 showed high mean performance for seed yield.
Analysis of genetic parameters revealed higher phenotypic and genotypic
coefficient of variation, heritability, genetic advance as per cent of mean for
pods per plant, 100-seed weight, harvest index, phenol content, seed yield
per plant, primary and secondary branches per plant in parents and for pods
xiv
per plant and seed yield per plant in crosses indicating that simple selection
could be practiced for improving these characters.
The expression of heterosis was most evident for pods per plant, seed
yield per plant, phenol content, days to flowering, days to maturity, harvest
index, seed protein and SCMR at vegetative phase. Significant heterosis,
heterobeltosis, standard heterosis were recorded in the crosses viz.,
ICPL-15225 X ICPL-8863, LRG-41 X PRG-158, LRG-41 X ICPL-8863,
LRG-41 X ICPL-87119 and ICPL-15225 X ICPL-87119 for most of the
characters.
The analysis of variance for combining ability indicated the
predominance of non-additive gene action for all the traits due to higher sca
variance than gca variance. Among the parents LRG-41 and ICPL-15225
were found to be good general combiners for harvest index, pods per plant
and seed yield per plant, ICPL-2376 and ICPL-8863 for seed protein, phenol
content and earliness, ICPL-7035 for seeds per pod, pod length, 100-seed
weight and SCMR at vegetative phase, LRG-41 for plant height and
branches per plant. Based on sca effects, per se performance, heterosis,
ICPL-15225 X ICPL-8863, ICPL-15225 X ICPL-87119 and LRG-41 X
PRG-158 were identified as the best specific cross combinations for hybrid
breeding programme, while the crosses ICPL-15225 X PRG-158 and
LRG-41 X ICPL-8863 were identified for advancing through recombination
breeding programme.
Character association studies indicated that the character pods per
plant had significant positive correlation with seed yield per plant and also
inter-correlations were observed among seeds per pod, pod length and 100-
seed weight. Path coefficient analysis revealed the high positive direct
influence of pods per plant on seed yield and it also had positive indirect
effects on seed yield via all the characters except 100-seed weight and
SCMR at vegetative phase in both parents and crosses. Hence, selection for
pods per plant is suggested for the improvement of seed yield per plant in
pigeonpea.
 
Date 2016-06-02T10:39:28Z
2016-06-02T10:39:28Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/66611
 
Language en
 
Relation D8944;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY