Record Details

GENETIC DIVERGENCE AND CHARACTER ASSOCIATION IN PHYSIC NUT [ Jatropha curcas L.]

KrishiKosh

View Archive Info
 
 
Field Value
 
Title GENETIC DIVERGENCE AND CHARACTER ASSOCIATION IN PHYSIC NUT [ Jatropha curcas L.]
 
Creator ANITHA, VELURU
 
Contributor PRASANTHI, L
 
Subject planting, yields, developmental stages, genotypes, sowing, genetics, oils, irrigation, biological phenomena, selection
PHYSIC NUT, Jatropha curcas L
 
Description The present investigation was conducted in the Biofuel research block
laid in Randomized Block Design replicated thrice at Regional Agricultural
Research Station, Tirupati during kharif 2009 (5th year crop) to study the
genetic divergence, genetic parameters, character association and path
coefficient analysis in 40 genotypes of Jatropha. In addition RAPD analysis
was carried out for 12 selected genotypes of Jatropha based on D2 analysis.
Observations were recorded on fourteen characters.
Analysis of variance indicated the existence of significant genotypic
differences for all the fourteen traits. The genotypes, viz., TJC-35, TJC-34
and TJC-36 showed high mean performance for seed yield.
Genetic divergence studies by Mahalanobis's D2 analysis indicated the
existence of significant diversity in 40 Jatropha genotypes which were
grouped into 8 clusters. The results revealed that the geographic diversity
might not always be related to genetic diversity. The characters seed yield per
plant and plant height contributed maximum towards genetic divergence. The
maximum inter-cluster distances was observed between cluster I and cluster
VII followed by cluster II and VII, cluster V and VII. Hence, genotypes viz.,
TJC-23 and TJC-14 from cluster I, TJC-1 and TJC-5 from cluster II, TJC-4
from cluster V and TJC-35, TJC-34 from cluster VII may be included in
hybridization programme for obtaining superior hybrids.
The estimates of GCV and PCV were high for seed yield per plant,
capsule yield per plant, number of inflorescences per plant. High heritability
coupled with high genetic advance as per cent of mean was recorded for all
the characters except SCMR at vegetative stage.
Character association studies indicated that the characters capsule yield
per plant, oil yield per plant, number of capsules per cluster, number of
female flowers per inflorescence, water use efficiency, plant height, SCMR,
photosynthetic rate, number of inflorescences per plant, number of branches
per plant, 100 seed weight and oil content were significantly associated with
seed yield and also among themselves. Path coefficient analysis revealed that
capsule yield per plant and oil yield per plant are important yield components
having direct bearing on the improvement of seed yield.
RAPD analysis detected a high level of genetic variation among the 12
Jatropha genotypes selected based on D2 analysis. A high degree of
polymorphism was obtained with the primers OPB-1 (13 bands), OPA-18,
OPB-20 and OPR-6 (9 bands) and similarity index values ranged from 0.276
to 0.726 indicating the presence of wide range of genetic diversity. Based on
both Mahalanobis’s D2 statistic and RAPD analysis TJC-4 from cluster V and
TJC-35 from cluster VII were more divergent and included in hybridization
programme for obtaining superior and desirable recombinants.
 
Date 2016-06-03T10:17:43Z
2016-06-03T10:17:43Z
2010-07
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/66685
 
Language en
 
Relation D8966;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY