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STABILITY PARAMETERS FOR TILLERS, GRAIN WEIGHT AND YIELD OF WHEAT CULTIVARS IN NORTH-WEST OF PAKISTAN

LATAFAT PARVEEN¹, IFTIKHAR HUSSAIN KHALIL^1* AND SHAD K. KHALIL²

Abstract: Thirteen spring wheat cultivars were evaluated for 2-years at 5 diverse locations of NWFP for stability analysis of tillers per m², 1000-grain weight and grain yield. Combined analysis of variance revealed significant differences among locations, years and location×year interactions for these wheat traits. Cultivar×year interaction was highly significant (p=0.01) for 1000-grain weight and grain yield, while cultivar×location interaction was highly significant only for productive tillers per m². However, cultivar×location×year interaction existed for all traits (p=0.01). Maximum number of productive tillers of 410 per m² were produced by wheat cultivar Dirk followed by Fakhre Sarhad (396 tillers per m²) and Nowshera-96 (395 tillers per m²). Cultivars Dirk and Nowshera-96 excelled in 1000-grain weight (43 g). Maximum grain yield of 4259 kg ha^-1 was produced by cultivar Nowshera-96 followed by Fakhre Sarhad (4183 kg ha^-1). Wide range of stability statistics was observed among cultivars for all the three parameters. Though none of the wheat cultivar had b- value equal to unity for tillers m^-2, 1000-grain weight or grain yield, but Pirsabak-85, Bakhtawar-92, Nowshera-96 and Fakhre Sarhad were the stable cultivars on the basis of overall mean yields and stability parameters viz., regression coefficients and minimum deviations from regression.

¹Department of Plant Breeding and Genetics, NWFP Agricultural University, Peshawar, Pakistan

²Department of Agronomy, NWFP Agricultural University, Peshawar, Pakistan