TITLE:
Genotype Environment Interaction (G × E) of Heat Tolerant Wheat Genotypes over Locations and Years
AUTHORS:
Md. Abdul Hakim, Bhabendra Kumar Biswas, Md. Hasanuzzaman, Mohammad Quamrul Islam Matin, Most. Bilkis Banu, Naresh Chandra Dev Barma, Arun K. Joshi
KEYWORDS:
Wheat Genotype, Over Location, Over Years, Heat Stress
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.12 No.11,
November
11,
2021
ABSTRACT: 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.