Evaluation of Agronomic Traits for Yield and Yield Components in Advance Breeding Lines of Rice

摘要

In present work fifteen advanced lines of rice (Line-59, Line-25, Line-NPT-1, Line-161-S, Line-188, Line-186, Line-9, Line-93, Line-99, Line-184, Line-103, Line-77, Line-5, Line-18 and Line-188-S) were evaluated in the background of Bas-385 for their yield and yield attributing traits. Mean values for quantitative traits were compared according to least significant difference (LSD) statistical test. The observations were recorded in accordance with IRRI technical bulletin on morphology and varietals characteristics. Data on agronomic parameters was collected from productive tillers of three plants of each entry at appropriate stage of growth to examine variation. Among the entire yield attributing traits plant height, panicle length, primary branches, secondary branches, filled spikelets, unfilled spikelets, tillers per plant, thousand grains weight and yield per plant showed significant variability. Line-18, Line-186, Line-59, Line-103 and Line-77 proved to be best in grain yield/plant. Correlation analysis represent that yield was positively correlated with filled spikelet (0.645**P=0.01) and 1000 grains weight with primary branches (0.654* P=0.01). Range of genetic distance observed among the tested lines was (GD = 0-60%) based on SDS PAGE. The dendrogram showed that sixteen genotypes were grouped in five categories (A–E) comprising 5, 6, 2, 2 and 1 genotypes, respectively. Line-103 and Line-59 were most distantly related to each other and could be used for breeding to improve rice cultivars. To exploit their genetic potential, these genotypes can beneficially be used in the breeding programs.