Genetic analysis of yield and yield contributing traits in rice(Oryza sativa L.) BC 2 F 3 population derived from MR264 × PS2. Biotechnology & Biotechnological Equipment, 36 (1). pp. 184-192. ISSN 1314-3530 (2022)
Abstract
High yield potential in rice is indirectly determined by yield-related traits. These traits are complexand regulated by several genes whose expression is affected by environmental conditions. It isof great importance to disclose the genetic relationships between yield and its yield componentsfor multi-trait improvement in rice. Therefore, the present study aimed to investigate the geneticvariability and inheritance patterns of yield and yield attributed traits in BC 2 F 3 rice lines toidentify the ideal lines from the selection. A total of 36 improved versions of blast resistantplants in the BC2 F 3 population used in this study were developed from a single cross betweena high yielding mutant rice variety but susceptible to blast, MR264, and Malaysian local varietydonor for Pi-7(t) and Pikh blast resistant genes. Analysis of variance showed that all traits weresignificantly different for lines except grain length and grain width. High heritability and geneticadvance were recorded for plant height, number of tillers, filled grain, 1000-grain weight andseed setting rate. A significant and positive correlation was recorded with most evaluated traits,except for grain length and grain width. Thirty-six BC2 F 3 lines were clustered into four majorgroups and the first three principal components (PC3) contributed 71.13% of the total variation,with 1000-seed weight, yield/hill and filled grain being the main discriminatory characters. Therewas an adequate genetic variability in the lines, and 1000-grain weight, yield/hill and filled graintraits could be considered for indirect selection in breeding programs in next generations.
| Item Type: | Article |
|---|---|
| Keywords: | Blast resistant rice, Genetic diversity, Heritability |
| Taxonomy: | By Niche > Genome > Genomes By Niche > Genome > Plant Genome Mapping |
| Collections: | Niche > Genome |
| Depositing User: | Muhamad Nasir Roslan KPA |
| Date Deposited: | 05 Aug 2026 08:38 |
| Last Modified: | 05 Aug 2026 08:38 |
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