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HERITABILITY STUDIES FOR GRAIN YIELD AND YIELD COMPONENTS IN F₃ SEGREGATING GENERATION OF SPRING WHEAT

SHOUKAT ALI MANGI, MAHBOOB ALI SIAL¹, BASHIR A. ANSARI, M. AFZAL ARAIN¹, K. A. LAGHARI¹AND AMEER AHMED MIRBAHAR²

Abstract: Heritability estimates provide information about the extent of which a particular genetic character to be transmitted to the successive generations. Heritability studies were conducted in four F₃ segregating populations originated through cross combinations of 6 wheat varieties/ advanced lines i.e., Sarsabz, Soghat-90, Marvi-2000, SI-91195, SD-1200/14 and IB-25/99 at the Nuclear Institute of Agriculture, Tando Jam during 2004-05. Genetic variance, environmental variance, heritability percentage in broad sense and genetic advance were estimated for different grain yield and yield contributing traits. The highest heritability (83.09%) associated with genetic advance (55.39) for grain yield was observed in cross combination of Marvi-2000 x Soghat-90 followed by Marvi-2000 x SI-91195 (80.0%; GA: 39.9), revealed good parental combination  for effective selection for high yielding plants in segregating population.

Sindh Agriculture University, Tandojam, Pakistan

¹Nuclear Institute of Agriculture (NIA) Tandojam, Pakistan

² Plant Tissue Culture & Biotechnology Division, HEJ Research Institute of Chemistry,  University of Karachi-Karachi75270, Pakistan