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|Title:||Morphological and biochemical characterization of elite genotypes of linseed|
|Abstract:||The present investigation entitled “Morphological and biochemical characterization of elite genotypes of linseed” was carried out to study the extent of genetic variability by estimation of different parameters such as genotypic and phenotypic coefficients of variation, heritability, and the expected genetic advance for eight quantitative characters. Multivariate analysis of genetic divergence was carried out using D2 analysis and Canonical analysis. Character association was studied by estimation of correlation coefficients and path analysis to determine the direct and indirect effects on seed yield among 52 elite genotypes of linseed. Biochemical characterization of elite linseed genotypes for 15 characters was carried out using gas chromatography and near infrared spectroscopy (NIRS). There exists a highly significant difference among these fifty two elite linseed genotypes for the different morphological characters under study as revealed through the analysis of variance (ANOVA). As evident from the coefficients of error variation (CVe) (1.04 to 15.02 %), a good degree of experimental precision was achieved in evaluation of genotypes for all the characters. For all the morphological characters studied among the set of linseed genotypes, the genotypic coefficient of variation was found to be lower than the phenotypic coefficient of variation. High PCV and GCV values were recorded for single plant yield which suggests the possibility of improving these traits through selection. Total number of branches and capsule per plant has high PCV and moderate GCV. It indicate there is environment effect & presence of moderate genetic variability. High heritability accompanied with high genetic advance was observed in single plant yield indicating that simple selection may improve the expression of the character by the action of additive gene effect. High heritability with moderate genetic advance was observed in total number of branches, capsules per plant, 1000 seed weight. It indicates these character are governed by both additive and non-additive gene action. Total number of branches was positive and significantly correlation with the yield. Path coefficient analysis revealed that traits like total number of branches, capsules per plant, seeds per capsule, thousand seed weight had high positive and direct effect on seed yield revealing its effectiveness towards the direct selection. Genetic divergence studies by D2 analysis reflected that clusters IV and VII are more divergent from each other so crosses involving genotypes from these clusters can produce desirable recombinants with greater heterotic effects. Genotypes, viz., GARIMA, KIRAN, OL-98-7-4, and OLC-11 could be sorted out for rabi cultivation in short winters due to their early maturity (86 to 88 days). In canonical discriminant analysis first two canonical functions accounted for 79.3% of the total variability and characters like days to 50% flowering, days to maturity and seeds per capsule in the first axis. Days to 50% flowering, branches per plant, capsules per plant, single plant yield were more contributing towards genetic divergence. Gas chromatographic estimations revealed that T-397 had a good balance of oleic and linolenic acid content in their oil profile. Higher linolenic acid in NDL-204 (46.79%) followed by NDL-205 (39.94%) and higher oleic acid was recorded in T-397 (40.84%) followed by NL-157 (39.91%).Oil content was found highest in the genotype OL-98-7-3 (37.35%) followed by KIRAN (36.36%) while linolenic acid was recorded highest in OL-98- 7-3 (22.53%) using NIRS. . Genotypes like V1K1-99-40, V1K2-99-57, V1K2-99-48, OL-98-6-2, LMS-47-2K found to be top yielders based on per se performance and can be recommended for commercial cultivation in Odisha after thorough testing through multilocational yield trails and future breeding programmes. One of the top yielders, OL-98-6-2 with its highest oleic acid, protein and oil content and optimum linolenic acid content can be a good quality genotype.|
|Theme:||Morphological and biochemical|
|Appears in Collections:||Thesis|
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