Wheat (Triticum Aestivum L.) Drought Tolerance Indices Under Water Stress Conditions

The observed traits included days to 1st booting, days to 90% heading, days to 90% maturity, peduncle length (cm), plant height (cm), tillers plant -1 , spike length (cm), spikelets spike -1 , grains spike -1 , seed index (1000-grain weight, g), grain yield plant -1 (g), biological yield plant -1 (g), and harvest index (%).Based on drought tolerance indices, the result demonstrated that genotypes, treatments, and genotypes ×treatments significantly affected yield and its contributing traits.The genotypes, such as Imdad-05, NIA Amber, and TD-1, considerably exhibited drought tolerance, whereas Marvi-2000 and Kiran-95 were susceptible.The grain yield expressed positive and significant association toward other traits, such as days to 1st booting, days to 90% heading, days to 90% maturity, peduncle length, plant height, tillers plant -1 , spike length, spikelets spike -1 , grains spike -1 , seed index grain weight, grain yield plant -1 , biological yield plant -1 , and harvest index.Seven indices calculated grain yield in Yp and Ys appeared significantly and positively associated with the first three components mentioned at about 95.76% of the total variability and directly connected with the STI, GMP, TOL, and MP, namely, Imdad-05, NIA Sunder, and TD-1 considered as highly drought-tolerant; Marvi-2000 and Benazir, as moderately tolerant, and NIA Amber and Kiran-95 were the susceptible ones.