Genotypic variability for responsiveness to rhizobium and vesicular arbuscular mycorrhiza (VAM) for seed yield attributes in chickpea
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Date
2011
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CCSHAU
Abstract
Twelve genotypes of chickpea were evaluated for genotypic variation for yield and its contributing traits
as well as nodulation and root characteristics to determine the response of chickpea genotypes to strains of
Rhizobium and VAM, for fourteen traits viz., days to 50% flowering, days to maturity, plant height (cm) , number
of branches per plant, number of pods per plant , 100 seed weight (g/plant), seed yield per plant (g), number of
nodules per plant, nodule weight per plant (g), root dry weight per plant (g), shoot dry weight per plant (g),
nitrogen content in shoot (%/plant) , nitrogen content in grain (%/plant) and VAM percent. The analysis of
variance revealed the existence of significant amount of genetic variability in the material for all the traits. All the
genotypes were treated with three treatments separately (Mesorhizobium sp. strain CH1233 (S1); Mesorhizobium
sp. strain CH810 (S2); Vesicular arbuscular mycorrhiza (Glomus fasiculatum) and one set was used as Control that
is left uninoculated. These were grown separately following Randomized Block Design with three replications in
each treatment. Comparative analysis indicated wide differences between treatments and behavior of genotypes in
different environments. In general S1 and VAM showed beneficial interaction for maximum number of traits for
all genotypes. The affect of VAM was the most apparent among treatments. High GCV was found for characters;
number of nodules per plant (all the treatments and control), nodule weight per plant (treatment S1, S2 and VAM),
shoot dry weight per plant (S2 and control), seed yield per plant (VAM and control) and 100 seed weight (S1
treatment). High heritability with high genetic advance was observed for the characters like seed yield, number of
pods per plant and number of nodules per plant, while high heritability with medium genetic advance was found
for nitrogen content in shoot, shoot dry weight per plant, days to 50% flowering, 100 seed weight and VAM
infection. On overall basis genotypes viz. HC-3, HC-5, GL94022, HC-5, ICC5003LN, HK2, GNG663 and BG362
were observed to be better performing and responsive to bioinoculants having one or more superior traits. These
genotypes performing better for specific traits can be used as parents in hybridization programme for improvement
of that particular trait.
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Keywords
Planting, Genotypes, Root nodulation, Chickpeas, Nitrogen, Developmental stages, Sowing, Yields, Biological phenomena, Genetics