TY  - JOUR
AU  - Jahin, Sopnil Ahmed
AU  - Das, Biswajit
AU  - Abdullah, Adrita
AU  - Akter, Sadia
AU  - Siddique, Mohammad Abu Kawsar Sarower
AU  - Hossain, Mohammad Anwar
PY  - 2024
DA  - 2024/11/01
TI  - Phenotypic Characterization of Advanced Breeding Lines of Rice (<i>Oryza sativa</i> L.) for Drought and Low Phosphorus Stress Tolerance
JO  - OBM Genetics
SP  - 270
VL  - 08
IS  - 04
AB  - Drought and phosphorus (P) deficiency stress are two significant natural abiotic stresses restricting rice growth and yield worldwide. Developing rice varieties tolerant to drought and low P stress is crucial for sustainable agricultural production. To address these issues, two separate experiments were conducted using selected advanced rice breeding lines to study the impact of drought and low P stress on yield-attributing traits. The first experiment evaluated the drought stress tolerance of five advanced lines (Lines 14, 16, 20, and 22) under pot culture conditions by applying drought stress and not providing water throughout the reproductive stages (late booting to ripening). All genotypes under study exhibited a significant reduction in the yield of grain, ranging from 75.68% to 39.52%, as well as spikelet fertility and SPAD value when drought stress was applied; however, Line 20, BRRI dhan71, and Nerica 10 showed a less significant decrease. Conversely, days to first flowering, days to maturity, and the number of unfilled grains increased significantly in all of the genotypes studied; however, Line 20, BRRI dhan71, and Nerica10 showed a slight increase. Based on stress tolerance indices, Nerica 10, BRRI dhan71, and Line 20 are the best performers. In the second experiment, four advanced lines (Lines 3, 4, 6, and 20) were evaluated for low phosphorus (P) stress tolerance under conditions where no P fertilizer was applied. The application of low P stress significantly harmed all of the yield characteristics (excluding days to first flowering, days to maturity, and number of unfilled grains) of most of the genotypes, while Binadhan-17, Line 4, and Line 20 displayed a milder reduction, with overall grain yield reductions across genotypes ranging from 40.74% to 8.78%. Binadhan-17 and Line 20 showed higher stress tolerance indices and were classified as low P-tolerant genotypes. Considering both experimental results, the advanced breeding Line 20 was categorized as a promising advanced line. Therefore, Line 20 could be a potential donor parent for breeding drought and P deficiency-tolerant rice varieties.
SN  - 2577-5790
UR  - https://doi.org/10.21926/obm.genet.2404270
DO  - 10.21926/obm.genet.2404270
ID  - Jahin2024
ER  -