Author(s)

Md. Abdul Hakim¹, Bhabendra Kumar Biswas², Md. Hasanuzzaman², Mohammad Quamrul Islam Matin^3*, Most. Bilkis Banu³, Naresh Chandra Dev Barma⁴, Arun K. Joshi⁵

¹Bangladesh Wheat and Maize Research Institute (BWMRI), Dinajpur, Bangladesh.
²Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur, Bangladesh.
³Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh.
⁴Bangladesh Wheat and Maize Research Institute (BWMRI), Dinajpur, Bangladesh.
⁵International Maize and Wheat Improvement Centre (CIMMYT), NASC Complex, DPS Marg, New Delhi, India.

Twenty heat tolerant wheat genotypes were evaluated in three heat stress environments of Bangladesh such as Wheat Research Center (WRC), Nashipur, Dinajpur, Regional Wheat Research Center, BARI, Gazipur, Regional Wheat Research Center, RARS, Jashore in 2015-2016. The experiments were conducted in RCBD with three replications in 2015-2016. The stability and response to change of location and sowing time of the genotypes were assessed through AMMI model and regression coefficient analysis on seven characters, viz. days to heading, days to maturity, plant height (cm), spikes m^-2, grains spike^-1, 1000-grain weight (g) and yield (kg·ha^-1). Among the linear interactions, sowing time alone exerted the maximum sum of square (335,388,000.00**) and among the non-linear interactions, location × year paid the highest effect (7,676,490.00**), which was followed by year × location × sowing time interaction (3,956,500.00**). The highest grain yield (4475.3 kg·ha^-1) was obtained from the genotype G13, followed by the genotypes G17 (4460.8 kg·ha^-1) and G19 (4404.7 kg·ha^-1). The genotype G8 had the smallest interaction effect, while the genotype G14 followed by G10 responded vigorously to amelioration. The genotypes G13, G18 and G19 showed averagely high yield and showed stability over the environmental modifications. The other two genotypes G20 and G12 exhibited great reduction of yield potential under unfavorable environment. The environment 121 proceeded by J121 and G131 appeared as favorable environments. The genotypes G13 and G19 produced high yield (kg·ha^-1) in the favorable environments. The genotypes G16 and G18 high IPCa1 scores, indicated sensitive to mega-environmental changes. The best genotype with respect to environment was genotype G13. Genotypes G17 and G19 were best for site E1; genotypes G14, G16 and G18 were best for site E2.

Wheat Genotype, Over Location, Over Years, Heat Stress

Hakim, M. , Biswas, B. , Hasanuzzaman, M. , Matin, M. , Banu, M. , Barma, N. and Joshi, A. (2021) Genotype Environment Interaction (G × E) of Heat Tolerant Wheat Genotypes over Locations and Years. American Journal of Plant Sciences, 12, 1633-1645. doi: 10.4236/ajps.2021.1211114.