STUDIES ON VARIABILITY, CORRELATION, MORPHOLOGICAL AND MOLECULAR DIVERSITY IN DRY CHILLIES {Capsicum annuum L.)
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Date
2007-08-30
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University of Agricultural Sciences GKVK, Banglore
Abstract
An investigation was undertaken during kharif 2005 at Botany
Garden of University of Agricultural Sciences, Dharwad with three
experiments. The experiment I consisted of evaluation of chilli
germplasm for productivity, its component traits, genetic diversity,
correlation and path analysis. The analysis variance indicated
significant differences among the genotypes for all the characters
under study. Yield and fruit related traits, exhibited high GCV, PCV
and high heritability coupled with high genetic advance.
Correlation study for yield per plant showed significant positive
association with all growth related, yield related and fruit related
traits. Plant height, fruit diameter, fruit surface area, pericarp weight
showed negative direct effect while all other characters showed
positive and high direct effect. The 55 genotypes were grouped into 14
clusters. Cluster XIV having lC-16 genotype showed maximum
average mean value for plant height, fruits per plant and yield per
plant. RAPD analysis with 20 random primers showed high
polymorphism with primer OPJ-01 and OPJ-10. No correlation was
observed between morphological and molecular diversity.
Segregating F4 populations of chilli was source material for
experiment 11, in which genetic variability, correlation and path
analysis were estimated. Variability studies revealed high within
family variance for most of the characters in all the populations
indicating its segregating nature. High phenotypic variance was for
productivity traits was observed in S-32 x LCA-312 and S-32 x SK
populations. In all the populations, plant growth characters showed
positive association with yield. Path analysis revealed that number of
fruits per plant had maximum direct effect on yield per plant.
In experiment 111, 20 selected F4 families were screened for
thrips and mites resistance. Pest susceptibility index and yield
stability ratio of above families indicated that, families involving S-32
X SK, S-32 X LCA-312 crosses showed high resistance with high yield
in pest environment than checks which could be attributed to
resistance of parent S-32 to leaf curl complex.
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