Yield stability in bread wheat genotypes | Pakistan Journal of Botany 2011

Author(s)

Muhammad Afzal Arain Nuclear Institute of Agriculture (NIA), Tandojam, PAKISTAN

Mahboob Ali Sial Nuclear Institute of Agriculture (NIA), Tandojam, PAKISTAN

M. Arif Rajput Nuclear Institute of Agriculture (NIA), Tandojam, PAKISTAN

Ameer A. Mirbahar Biotechnology Wing, HEJ, Research Institute of Chemistry, University of Karachi, Pakistan

Abstract

Stability for grain yield performance and genotype x environment (GxE) interaction was studied in twelve (nine advance genotypes and 3 checks) wheat genotypes evaluated at various locations having different agro-climatic conditions in Sindh province of Pakistan over two years. The combined and individual analysis of variance for locations and years was conducted. Pooled analysis of variance revealed highly significant (p<0.01) difference for genotypes, environments and genotype x environment (GxE) interaction. A joint regression analysis was applied to grain yield data to estimate the stability parameters viz., regression coefficient (b), s.e. (b) and deviation from regression coefficients (S2d) for each genotype. Genotype MSH-14 produced the highest mean yield (5090 kg/ha) in all environments averaged for two years, and had regression coefficient (b) close to unity (0.86) and S2d close to zero (0.7923). This indicated wide adaptation and stability of performance of MSH-14 in all environments. Other high yielding genotypes MSH-03 and MSH-05 ranked 2nd and 3rd showing regression coefficient (b=0.78 and 0.69 respectively) and deviation from regression (S2d= 1.076 and 1.29 respectively) indicating specific adaptability of these genotypes to harsh (un favorable) environments. These findings suggested that both the genotypes could be used as stress tolerant genotypes under stressed environments (such as drought, heat and salinity stress).

Publication Details

Page(s) 2071-2074

DOI DOI not available

Published Journal: Pakistan Journal of Botany, Volume: 43, Issue: 4, Year: 2011

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