Selection of Stable and High-Yielding Short-Duration Inbred Rice (Oryza sativa L.) Genotypes for the Boro Season in Bangladesh Using WAASB and MTSI Indices

Le résumé fourni par la source

This experiment verified four genotypes (V1 = BR11318-5R-63, V2 = BR11337-5R-72, V3 = SVIN109, V4 = IR17A1723) alongside two released varieties (V5 = BRRI dhan81, V6 = BRRI dhan96) across 11 sites nationwide during the 2022–23 Boro season. Combined ANOVA proved substantial impacts of genotype, environment, and genotype-environment interaction (GEI) on yield and yield-related factors (p < 0.001). The majority of characteristics showed good selection accuracy (>0.80), while the broad-sense heritability (h²b) varied between 0.05 and 0.50. Stability analysis deployed weighted average of absolute scores biplots (WAASB) indicated V1 and V3 as the most stable, while GGE biplots highlighted V2’s outstanding grain yield (GY) across multiple regions. The multi-trait stability index (MTSI) ranked V2 as the most consistent for grain yield (GY) and seven yield-contributing attributes. Factor analysis indicated that it has farming benefits, with growth duration (GD) and thousand grain weight (TGW) being the most inheritable traits (0.92), followed by plant height (PHT) (0.885) and grain yield (GY) (0.833), and selection gains ranging from 1.48% to 9.54%. Overall, BR11337-5R-72 (V2) has proven to be the most advantageous short-duration, high-yielding, and stable genotype for Boro rice farming, necessitating additional assessment and promotion for widespread adoption.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.