Browsing by Author "RAVINDER KUMAR"
Now showing 1 - 1 of 1
Results Per Page
Sort Options
ThesisItem Open Access GENETIC ANALYSIS FOR SEED YIELD AND ITS ATTRIBUTES IN SESAME (Sesamum indicum L.)(SARDARKRUSHINAGAR DANTIWADA AGRICULTURAL UNIVERSITY - SARDARKRUSHINAGAR, 2020-10-09) RAVINDER KUMAR; J. A., PATELThe present investigation “Genetic analysis for seed yield and its attributes in sesame(Sesamum indicum L.)” involved crossing of 7 divergent sesame genotypes in halfdiallel fashion to generate 21 F1s. A set as 29 entries including 7 parents, 21 F1s and standard check GT 04 were evaluated in randomized block design with three replications at “Agronomy Instructional Farm, S. D. Agricultural University, Sardarkrushinagar, (Gujarat)” during kharif 2019. The observations were recorded on plot basis for days to flowering and days to maturity and randomly selected plant basis for plant height, number of seeds per capsule, 1000 seed weight (g), seed yield per plant (g), harvest index (%), oil content (%), number of primary branches per plant, number of capsules per plant and capsule length (cm) on randomly selected five individual plants. The data were subjected to estimation of heterosis, combining ability analysis (Model-I, Method-2 of Griffing, 1956b). Analysis of variance for the mean sum of squares for genotypes showed significant differences for almost all the characters studied, indicating the presence of sufficient variability among genotypes. The variances due to parents were significant for all the traits except plant height, number of primary branches per plant, number of seeds per capsule, capsule length and harvest index. While the hybrids showed significant differences for all eleven characters revealing the presence of sufficient genetic variability among hybrids for the majority of the characters studied. Parents Vs hybrids also showed a significant difference for the number of capsules per plant, capsule length and seed yield per plant characters. Several crosses exhibited significantly desirable heterobeltiosis and standard heterosis for seed yield per plant and other characters. Based on per se performance and estimates of heterobeltiosis, the crosses GT 03 x AT 307 (35.23 %), AT 413 x AT Abstract ii 307(26.63 %) and SKT 1501 x AT 307 (21.88 %) were found to be most promising for seed yield per plant. Combining ability analysis revealed the presence of both additive and non-additive gene effects. The estimates of GCA effects of parents revealed that GT 03 showed a high level of significant gca effect in the desired direction for all the character except number of seeds per capsule, capsule length, test weight and oil content. The cross AT 413 x AT 307 was found good specific combiner for days to flowering, number of capsules per plant, seed yield per plant and harvest index. Looking to the role of additive and non-additive genes with preponderance of nonadditive genes effects controlled the expression of seed yield per plant and its components. It was suggested that hybridization-based selection methods could be used for further scope of improvement in present study; such as single seed descent (SSD) method, bulk selection, pedigree selection and transgressive breeding. On the basis of per se performance, heterosis and combining ability effects for seed yield per plant and its components, parents AT 307 and GT 03 and the hybrids SKT 1501 x AT 307, GT 03 x AT 307 and GT 03 x AT 413 were identified superior for their largescale testing.