Effect of salinity on dry matter production stability of rice (Oryza sativa L.)

Abstract

Effect of salinity on dry matter production stability was examined in 50 rice genotypes. Significant differences observed among genotypes, environmental conditions, genotypes × environment interaction (G × E) and environment (linear) for seedling dry weight suggested the presence of variability in genotypes and their responses to stressful environments. A wide variation was observed in mean dry matter yield (Yi) as well as sensitivity to salinity as indicated by regression coefficient (bi). It (bi) was close to 1 for root and / or shoot dry weight in a number of genotypes, viz. Arshinay amon, Azobbati, Balamdhan, Bethidhan, BINA-5-153-8-163, BR 18, BR 22, Dolichakkol, DM152, Gambur, IR 21015-196-3-1-3, Jabra aus, Kalobori, Pokkali, Shialporangi, etc., but in others regression coefficient was found to deviate from unity. High mean yield (Yi) higher than grand mean associated with low regression coefficient (b i<1) and deviation from regression (S2 di <1) for root and / or shoot dry weight was observed in some genotypes, viz. Balamdhan, Birpala, Canning 7, Dolichakkol, Milagrosa, Pokkali, Shialproangi, etc. Stability in dry matter production in rice genetypes was discussed in relation to their Yi, bi and S2di values.

Publication Title

Bangladesh Journal of Botany

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