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STUDIES ON MORPHOLOGICAL CHARACTERIZATION AND GENETIC DIVERGENCE IN SAFFLOWER (Carthamus tinctorius L.)

KrishiKosh

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Title STUDIES ON MORPHOLOGICAL CHARACTERIZATION AND GENETIC DIVERGENCE IN SAFFLOWER (Carthamus tinctorius L.)
 
Creator SREENIVASA, V
 
Contributor SREEDHAR, N
 
Subject STUDIES, MORPHOLOGICAL, CHARACTERIZATION, GENETIC, DIVERGENCE, SAFFLOWER
 
Description A study of the nature and magnitude of genetic variability present in
germplasm accessions is an essential pre-requisite for its utilization in any plant
breeding programme. This information helps in selecting desirable parents for
evolving superior varieties and heterotic recombinants, based on the variability and
extent of diversity present in the population. As most of germplasm accessions, which
have adopted biotic and abiotic characteristic features remain unutilized. A concerted
effort is required to tap the beneficial genes through conventional hybridization
techniques.
In the present study, a trial consisting of sixty germplasm accessions and four
check varieties was laid in simple lattice design with two replications at college farm,
College of Agriculture, Rajendranagar, Hyderabad. The data were recorded for ten
morphological and eight quantitative characters.
Morphological characterization was done with IPGRI descriptor guidelines.
Considerable amount of variability was observed for all morphological characters.
Analysis of variance revealed significant differences among genotypes for all
the characters studied indicating wide variability in the experimental material. High
estimates of phenotypic and genotypic co-efficient of variations for seed yield/plant,
number of effective capitula/plant and number of filled seeds in main capitulum
indicating maximum variability for these characters among the genotypes studied
while low variability estimates were noticed for days to 50 per cent flowering.
The quantum of genetic divergence between genotypes in the experimental
material was assessed by mahalanobis D2 analysis. The cluster analysis partitioned the
64 genotypes into nine clusters based on D2 values. The pattern of distribution of
genotypes into various clusters revealed no relationship between geographical and
genetic diversity. Maximum genetic divergence was found between cluster II and
cluster VIII, followed by Cluster I and Cluster VIII suggesting that the genotypes in
these clusters could be fully exploited to explore the wide range of heterosis and to
release good recombinant lines by intermating them through definite mating designs.
Correlation analysis revealed that number of filled seeds in main capitalum,
diameter of main capitulum, days to 50 per cent flowering and oil content had
significant positive association with seed yield, while 100-seed weight and number of
effective capitala/plant exhibited negative association with seed yield.
Path analysis revealed that 100-seed weight had highest positive direct effect
followed by oil content on seed yield. Plant height and days to 50 per cent flowering
exhibited negative direct effect on seed yield.
 
Date 2016-08-16T13:48:27Z
2016-08-16T13:48:27Z
2006
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72569
 
Language en
 
Relation D7822;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD