Assessment of Variability and Identification of Transgressive Segregants for Yield and Yield Component Traits in Early Segregating Generations of Chickpea  

Shivakumar M. S. , Salimath P.M. , Suma S. Biradar , Timmanna P.O. , Shridevi O.
Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad,580005, Karnataka, India
Author    Correspondence author
Legume Genomics and Genetics, 2013, Vol. 4, No. 3   doi: 10.5376/lgg.2013.04.0003
Received: 11 Jul., 2013    Accepted: 17 Jul., 2013    Published: 19 Jul., 2013
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Shivakumar et al., 2013, Assesment of Variability and Identification of Transgressive Segregants for Yield and Yield Component Traits in Early Segregating Generations of Chickpea, Legume Genomics and Genetics, Vol.4, No.3 22-26 (doi: 10.5376/lgg. 2013.04.0003)

Abstract

In order to compute the genetic variability, heritability and genetic advance an investigation was carried out with 575 plants of F2 population and F2 derived F3 progenies from the cross between ICC 13124 and WR315 of chickpea (Cicer arietinum L.). The genotype ICC 13124 is tolerant to drought but susceptible to wilt, while, WR 315 is resistant to wilt and relatively less tolerant to drought. Considerably high variability was observed in 575 plants of F2 and F2-3 progenies. The phenotypic variance was higher than the corresponding genotypic variance for all the characters. Environmental influence was very meager in expression of most of the traits which is evident from narrow difference between Genotypic Coefficient of variation (GCV) and Phenotypic Coefficient of Variation (PCV) estimates. Heritability estimates in broad sense was high for all the characters under study in both F2 and F3 coupled with high genetic advance as per cent over mean indicated the presence of additive gene action for these traits. The crosses had thrown a good number of transgressive segregants over better parent for seed yield per plant. More number of transgressive segregants was found for number of seeds per plant followed by number of pods per plant and yield per plant. A track on these transgressive segregants should be maintained and forwarded to further generation till they reach nearly homozygous condition. Most promising one can be used in further breeding programme.

Keywords
Chickpea; F2 population; F2-3 progenies; Variability; Transgressive segregants
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