physicochemical

ABSTRACTS
Genetic divergence in chilli (Capsicum annuum L.)
Student: P. Kiran Kumar
Major Advisor : Dr. V. Chenga Reddy
Department of Genetics and Plant Breeding
The present study was conducted during kharif
2007 at Regional Agricultural Research Station, Lam
Farm, Guntur with 57 genotypes of chilli (Capsicum
annuum L.)
The genetic variability studies indicated that the
material investigation possessed variability which
provides sufficient basis for selection by the breeder High
heritability coupled with high genetic advance as per
cent of mean was observed for all the characters except
days to 50 % flowering, days to maturity and 1000-seed
weight.
Correlation between dry fruit yield per plant and
its determining characters inferred that plant height, plant
spread, number of fruits per plant, fruit length, fruit girth
and number of seeds per fruit had positive significant
correlation with yield suggesting that effective
improvement in yield can be achieved through selection
based on these characters.
Path analysis revealed high positive high
positive direct effect of fruit girth, fruit length, plant height,
days to maturity, number of seeds per pod, plant spread
and capsanthin content (EOA colour value). Hence, taller
plants with more plant spread, fruit length, fruit girth,
number of seeds per fruit and early maturity should be
preferred while breeding for high dry fruity yield in chilles.
Based on D 2 statistic, crosses are proposed to
be attempted in future breeding programmes between
cluster IX (LCA-825) and XVII (LCA-809), followed by
cluster XVII (LCA-809) and IV (LCA-851) and cluster IV
(LCA-851) and VIII (LCA-846) to obtain desirable
segregates.
Agglomerative cluster analysis revealed wide
genetic distance between clusters IV (LCA-815, LCA-
847, LCA-334, LCA-850) and V (LCA-802, LCA-835,
LCA-809, LCA-826) followed by clusters II (LCA-819,
LCA-829, LCA-816) and V (LCA-802, LCA-835, LCA-
809, LCA-826). Hence, hybridization among these
clusters would produce superior segregants.
Based on the agglomerative cluster analysis,
principal component analysis and D2 statistic, the
genotypes LCA-816, LCA-815 and LCA-809 were from
diverse groups and can be utilized in future hybridization
programmes to produce superior segregants.
M.Sc (Ag), 2008
Genetic divergence in chickpea (Cicer arientinum L.)
Student: P. V. Padmavathi
Major Advisor : Dr. S. Sreemannarayana Murthy
Department of Genetics and Plant Breeding
The present investigation entitled “Genetic
divergence in chickpea (Cicer arientinum L.)” was carried
out Regional Agricultural Research Station, Lam Farm
Guntur with 30 desi and 30 kabuli genotypes. The
analysis of variance revealed significant differences
among the genotypes for all the characters studies in
both desi and kabuli genotypes of chickpea
In both desi and kabuli groups, high PCV and
GCV were observed in respect of biological yield per
plant and seed yield per plant while high heritability
coupled with high genetic advance as per cent of mean
was observed for number of primary branches, number
of secondary branches, number of pods per plant. Hence,
improvement in these characters is possible through
direct phenotypic selection.
The correlation study indicated positive association of
plant height number of primary branches, number of
secondary branches, number of pods per plant, 100-
seed weight, harvest index and biological yield per plant
with seed yield and both in desi and kabuli genotypes.
Hence, simultaneous improvement of these characters
along with seed yield is possible. Protein content showed
negative association with seed yield in both desi and
kabuli genotypes which denotes that simultaneous
improvement of this trait along with seed yield is not
possible.
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