QUANTITATIVE, HETEROSIS AND COMBINING ABILITY ANALYSIS OF MORPHOLOGICAL TRAITS OF WHEAT (TRITICUM AESTIVUM L) UNDER WATER STRESS CONDITIONS

Abstract

Wheat genotypes were evaluated -under water stress conditions to find out drought resistant line in split plot design where stress treatments were main plots and genotypes were subplots. Five genotypes were used to develop ten F1 hybrids using half diallele mating design. Mean squares of genetic parameters viz. General Combining Ability (GCA), Specific Combining Ability (SCA) and their effects, heterosis and heterobeltiosis showed highly significant differnces (>0.01%) for most of the traits. NIA-sarang, TD-1 and Sarsbz showed highly significant GCA under non-stress and water stress for grain yield main spike-1, seed index plant-1 and grain yield plant-1. Highly significant SCA for NIA-sarang x Kiran-95, TD-1 x NIA-sarang, Sarsabz x Kiran-95 and Sarsabz x NIA-sarang for grain yield main spike-1 under non-stress. Under both water stress, hybrid TJ-83 x Kiran-95, TD-1 x Kiran-95, Sarsabz x NIA-sarang and NIA-sarang x Kiran-95, TJ-83 x TD-1, TJ-83 x Sarsabz and NIA-sarang x Kiran-95 showed highly significant SCA for grain yield main spike-1. Great seed index plant-1 gave TJ-83 x TD-1 and TJ-83 x Kiran-95 under non-stress. Hybrid TJ-83 x Sarsabz, NIA-sarang x Kiran-95, TD-1 x Kiran-95 and TJ-83 x Sarsabz showed highly significant SCAs for seed index plant-1 under water stress. For grain yield plant-1, hybrid TJ-83 x TD-1, NIA-sarang x Kiran-95, Sarsabz x Kiran-95showed great SCAs under non-stress and under water stress. Heterobeltiosis under non-stress noted in NIA-sarang x Kiran-95, TD-1 x NIA-sarang, Sarsabz x Kiran-95, Sarsabz x NIA-sarang and Sarsabz x TD-1, under water stress, TJ-83 x Kiran-95, TD-1 x Kiran-95, Sarsabz x NIA-sarang, Hybrid TJ-83 x Sarsabz, TJ-83 x TD-1, Sarsabz x NIA-sarang, Sarsabz x TD-1 and NIA-sarang x Kiran-95 showed heterobeltiosis for grain yield main spike-1 and recommended to include future breeding schemes.