GENETIC PARAMETER ASSESSMENT FOR YIELD AND SEED QUALITY ATTRIBUTES IN LINSEED UNDER IRRIGATED CONDITION (Linum usitatissimum L.)
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Date
2023
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RPCAU, Pusa
Abstract
The present investigation entitled “Genetic parameter assessment for yield and seed quality attributes in linseed under irrigated condition (Linum usitatissimum L.)”was conducted at experimental farm of department of Seed Science and Technology, Dholi, Muzaffarpur during Rabi 2022- 2023 in Randomized Block Design with 3 replications consisting of 25 genotypes of linseed including two checks (T-397 and Kota Alsi-6). Data were analyzed for 18 quantitative and seed quality parameters in linseed (Linum usitatissimum L.) to obtain values for genetic variability, heritability and genetic advance, correlation of different quantitative characters with seed yield and among themselves and direct and indirect effects of various yield contributing traits towards seed yield.
Analysis of variance demonstrated highly significant differences among the genotypes for all the traits under studied. Estimation of mean performance of all the genotypes revealed that the entries Shekhar, RLC-200 and LMS-2020-I-1 showed significantly earliness in days to 50% flowering, the genotypes Shekhar and LCK-2215 exhibited significantly earlier days to maturity than the best check. Further, estimates showed that the entries Shekhar, RLC-18117, LMS-2020-I-1 and BRLS-131 showed significant superiority over check for the traits no. of primary branches per plant, no. of capsules per plant, no. of seeds per capsules and seed yield per plant.
The magnitude of GCV and PCV were found high for seed yield (kg/ha,), followed by seed yield per plant (g), no. capsules per plant and no. of primary branches per plant. Estimates of high heritability were observed for almost all the traits except few (no. of seeds per capsules and harvest index).High heritability coupled with the high genetic advance as percent of mean were observed for seed yield kg/ha., seed yield per plant, seedling root length, no. of capsules per plant, no. of primary branches per plant and plant height indicating preponderance of additive gene action and it will be more effective in genetic improvement through of these characters.
Correlation study revealed that no. of primary branches per plant, no. of capsule per plant, no. of seeds per capsules, harvest index and seedling root length were significant and positively associated with seed yield per plant whereas days to 50% flowering and days to maturity showed also significant but negatively correlated with seed yield per plant. All these traits may be used for development of high yielding genotypes along with early flowering with early maturity.Path coefficient analysis showed that the traits like no. of primary branches per plant, no. of capsules per plant, no. of seeds per capsule, harvest index and seedling root length has significant and positive direct effect on seed yield per plant whereas days to 50% flowering and days to maturity also exhibited significant but exerted negative direct effect on seed yield per plant. Thus, choosing genotypes based on these characters will aid in enhancing the potential seed yield of linseed genotypes.