Character Association and Stability Analysis in Blackgram [Vigna mungo (L.) Hepper]
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Date
2019-06-11
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MPUAT, Udaipur
Abstract
The present study entitled “Character association and stability analysis in
Blackgram [vigna mungo (L.) Hepper]” was carried out at Instructional Research
Farm, Department of Genetics and Plant breeding, Rajasthan College of Agriculture,
MPUAT, Udaipur. The experimental material comprising of thirty five genotypes of
blackgram including two checks were grown in a randomized block design with three
replications during July 2017 to October 2018 in three different seasons at different
dates of sowing viz., kharif 2017 as environment-1 and kharif 2018 as environment-2
and environment-3.
In each environment, observations were recorded on various quantitative traits
viz., days to 50 per cent flowering, days to 75 per cent maturity, plant height, number
of branches per plant, number of clusters per plant, number of pods per plant, number
of pods per cluster, pod length, number of seeds per pod, seed yield per plant,
biological yield per plant, harvest index, 100-seed weight and seed protein content.
ANOVA revealed significant differences among the genotypes for all the
characters studied in each environment. It indicates that the presence of considerable
variability among different genotypes.
Mean performance of various characters under different environments
revealed that environment-2 was the best environment followed by Environment-3
and environment-1. However, mean performance of number of pods per plant and
number of pods per cluster were observed highest in environment-1. Genotype KU-
16-92 was reported as high yielding genotype and expressed better performance for
most of the characters in each environment and over the environments. Genotypes
viz., TBU-2, KU-16-11, KU-16-8, AKU-14-02, KU-16-90, AKU-1604 and AKU-11-
23 were also showed better performance for various traits.
* M.Sc. Research Scholar, Department of Genetics and Plant Breeding, Rajasthan College of
Agriculture, Udaipur (Rajasthan) 313 001.
** Associate Professor, Department of Genetics and Plant Breeding, Rajasthan College of
Agriculture, Udaipur (Rajasthan) 313 001.
Rajwanti Saran*
Research Scholar
Sh. P. P. Sharma**
Major Advisor
Analysis of variance over the environments showed that mean squares due to
environment were significant for all the characters except for number of pods per
plant and seed protein content. Mean squares due to genotype were exhibited
significant difference for all the characters and mean squares due to G×E interactions
also found significant for all the characters except seed protein content.
The Bartlett’s 2 values were non-significant for eight characters out of
fourteen characters studied this revealed that error variance was homogeneous for
these eight characters viz., days to 50 per cent flowering, days to 75 per cent maturity,
number of branches per plant, number of clusters per plant, pod length, seed yield per
plant, harvest index and seed protein content. Therefore, pooled analysis was carried
out for only eight characters mentioned above.
Environment wise correlation study revealed that the characters viz., number
of clusters per plant, number of pods per plant, biological yield and harvest index
exhibited highly positive and significant correlation with seed yield per plant in each
environment and over the environments. While in environment-3, days to 50 per cent
flowering exhibited negative and significant correlation with seed yield.
Path analysis revealed that highest direct effect on seed yield was contributed
by number of pods per plant in each environment. Other traits like number of pods per
cluster, pod length, number of branches per plant also exhibited high direct effect.
These traits are subjected to selection for further improvement in yield.
Results of ANOVA for stability (Eberhart and Russell model, 1966) revealed
that the variances due to genotype and G×E (linear) interaction were significant for all
the eight characters whereas, variances due to E+(G×E) and pooled deviation were
also found to be significant for all the characters except seed protein content.
Variances due to environment (linear) component were non-significant for all the
traits.
Stability of different genotypes for various characters was studied by using
Eberhart and Russell model (1966). The genotypes KU-16-90, KU-16-6, KU-1695,
AKU-13-3, KU-16-9, TBU-2, AKU-14-02, KU-16-102 exhibited non-significant
deviation from regression. Therefore, these were stable and predictable for most of the
characters. In most of the cases values of significant regression coefficient were more
than unity (bi>1). Genotype KU-1698 and KU-16-9 expressed bi>1 for seed yield
hence these genotypes were stable and suitable for favourable environments. For days
to 50 per cent flowering, KU-1698, AKU-1604, TBU-2, KU-16-13 and Pratap Urd-1
and for pod length KU-16-87 showed regression coefficient around unity. It indicates
their stability and suitability under all the environments.
Based on mean performance and stability of various genotypes for different
characters studied it was concluded that the genotypes KU-16-90, KU-16-6, TBU-2,
AKU-14-02 and AKU-1604 were high yielding and showed stable performance in
different environments. Therefore, these genotypes can be used for cultivation and
hybridization programs for further improvement.
Description
Character association and stability analysis in Blackgram
Keywords
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Citation
Saran, R. and Sharma, P.P.