Stability Analysis in Ajwain (Trachyspermum ammi L.)
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Date
2015
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Publisher
MPUAT, Udaipur
Abstract
Twenty eight genotypes of Ajwain (Trachyspermum ammi. L) was planted
under two locations in four environments during late kharif 2013-14 and 2014-15 at
Udaipur and ARS, Pratapgarh.
Observations were recorded for eleven yield contributing characters.
Variability parameters, correlations and path analysis were computed over pooled
basis. Stability parameters were analyzed using the model (Eberhart and Russell,
1966).
Superior genotypes UA-7, UA-32 and UA-48 were identified on the basis of
their consistent per se performance in each environment and over pooled basis for
seed yield and its component traits. UA-32, UA-48 and UA-191 exhibited high oil
content while UA-32 displayed superiority for seed yield as well as oil content
characters. Large genetic advance as percentage of mean coupled with high GCV and
heritability were recorded for oil content, number of umbels per plants and seed yield
per plant over pooled basis suggesting that selection for these traits would be effective
for seed yield in Ajwain.
Association studies revealed that seed yield per plant was positively correlated
at genotypic and phenotypic level with biological yield per plant and Test weight.
path analysis studies indicated that oil content contributed to seed yield
directly with positive effect.
A joint regression analysis of variance based over four environments indicated
that genotypes differed significantly for almost all the characters except days to 50 per
cent flowering and days to 75 per cent maturity. The mean squares due to E + (G x E)
were significant for almost of the characters except days to 50 per cent flowering,
days to 75 per cent maturity and plant height.
Superior genotypes were identified with respect to their phenotypic stability
for different environmental conditions. Genotypes namely UA-7, UA-32 and UA-48
* P.G. Scholar, Department of plant breeding and Genetics, Rajasthan Collage of Agriculture, Udaipur
** Associate Professor, Department of Plant Breeding and Genetics, Rajasthan College of Agriculture,
Udaipur.
displayed high per se performance, above average response and stability for seed
yield per plant and its components. For oil content genotypes UA-32, UA-48 and UA-
191 had high per se performance under high management practices. Thus aforesaid
these Ajwain genotypes appeared the most promising.
To conclude the present study conducted in four environments at two
locations in two years based over various estimates viz. variability parameters,
correlations, path analysis and stability parameters. Ajwain genotypes UA-7, UA-32
and UA-48 appeared to be the most promising for seed yield as they were not only
stable but also had high per se performance for umbelets per umbel, seeds per
umbelet, biological yield per plant Test weight and seed yield per plant. Among these,
UA-32, UA-48 and UA-191 also possessed high oil content. The results so obtained
were critically discussed to give an impetus to Ajwain breeding programme. Thus,
stability of seed yield per plant in UA-7, UA-32 and UA-48 genotypes were imparted
by the stability of its component characters like like umbelets per umbel, seeds per
umbelets, biological yield per plant, seed yield per plant, Test weight and oil content.
Description
Stability Analysis in Ajwain (Trachyspermum ammi L.)
Keywords
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Citation
Meena and Dodiya, 2015