Genetic divergence studies in advance breeding lines of chickpea (Cicer arietinum L.) under rainfed conditions
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Date
2019-10
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Sher-e-Kashmir University of Agricultural Sciences & Technology of Jammu, Jammu
Abstract
The cultivated chickpea (Cicer arietinum L.) is the first most important pulse crop of India in area, production and productivity (Agrawal et al. 2018). Chickpea is one of the major pulse crop grown under rainfed conditions in Jammu and Kashmir during Rabi season. In the present investigation, twenty two advanced breeding lines of chickpea along with standard check (SCS-3) were evaluated in Randomized Block Design (RBD) with row length of 5m and spacing 30x10cm2 under rainfed conditions at the experimental farm of Advanced Center for Rainfed Agriculture (ACRA) Dhiansar during Rabi 2017-18 with the objectives to find out genetic variability, heritability, correlation coefficient, path analysis and genetic divergence. The analysis of variance showed highly significant differences for all the characters studied except days to maturity where it was significant at p=0.05. The high estimate of phenotypic and genotypic coefficient of variations were recorded for seed yield / plant. High heritability coupled with high genetic advance as per cent of mean was observed for seed yield / plant, biological yield / plant, test weight, number of pods / plant, number of primary branches / plant, number of secondary branches / plant, number of seeds / pod, relative growth rate, proline content and harvest index which indicated that additive gene effects is important in determining these characters and improvement can be done through selection based on phenotypic values. The most important character i.e. seed yield / plant, was positively and significantly correlated with plant height, number of pods / plant, test weight, biological yield / plant and harvest index. Path analysis revealed that characters viz. biological yield / plant, harvest index and plant height exhibited high positive direct effect on seed yield / plant. All the twenty two(22) advance breeding lines and check were grouped into 6 clusters based on D2 analysis. Cluster I and II were the biggest with 5 and 8 lines followed by cluster II containing 6 lines, respectively.
On the basis of genetic divergence and mean performance, advance breeding lines SCS-15-D-3, SCS-15-D-11, SCS-15-D-1, SCS-15-D-8 and SCS-15-D-15 have been suggested for further use in chickpea breeding programme
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