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Effect of Late Seeding Warmer Condition on Phenology and Yield of Wheat

S. Sharmin
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

M.A. Hasan
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

S. Sikder
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh

Abstract/ Executive Summary:

Four wheat variety/genotypes (BARI Gom-26, BAW-1202, BAW-1182, and BARI Gom-27) were tested under three heat stress regimes (normal, moderate, and severe) to evaluate the effect of late seeding warmer conditions on phenology and yield of wheat, as well as to identify suitable cultivars to develop heat-tolerant genotypes at Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during November 2016 to April 2017. Results revealed that genotype BAW-1182 and BAW-1202 showed greater thermostability of cell membrane with acceptable yield performance under heat stress conditions. The order of tolerance based on heat susceptibility index (based on grain yield) was BAW-1182>BAW-1202>BARI Gom- 27>BARI Gom-26 under heat stress conditions. Thus, BAW-1182 and BAW-1202 have the greatest potential to be used as high-yielding wheat genotypes under warm to hot environments and could be used in a breeding programme to develop heat-tolerant wheat.

Keywords: Cell membrane thermostability, Heat susceptibility index, Phenology, Yield, Wheat

Location: Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur

Start Date: 00-11-2016

End Date: 00-04-2017

Program Area: Variety and Species

Commodity: Wheat, Wheat

Objectives:

To evaluate the effect of late seeding warmer conditions on phenology and yield of wheat genotypes followed by screening high-temperature stress-tolerant traits of wheat genotypes in the breeding program.

Methodology:

The experiment was set up at Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur from November 2016 to April 2017. The experimental site was situated under the Dinajpur Sadar Upazila and located at 25º39′ N latitude and 88º41′ E longitude with an elevation of 37.58 meters above sea level. The experimental field was a medium high land belonging to the Non-calcareous Dark Grey Floodplain soil under the Agro-ecological Zone (AEZ-1) of the Old Himalayan Piedmont Plain. Three growing conditions -normal sowing on November 20, moderate heat stress sowing on December 20, and severe heat stress sowing on January 10 were placed in the main plots whereas four wheat variety/genotypes: BARI Gom- 26, BAW-1202, BAW-1182, and BARI Gom-27 were placed in sub-plots following split-plot design. Seeds were sown in rows 20 cm apart, at the rate of 120 kg ha^-1. A fertilizer dose of 140-35-75-18-2-0.5 kg ha^-1 N, P, K, S, Zn, and B was applied following fertilizer recommendation. Phenological stages like anthesis, physiological maturity were observed and recorded in days when 50% of plants of each plot reached a definite stage (Zadoks et al., 1974). Cell membrane thermostability test was done as described by Blum and Ebercon (1981). Heat susceptibility index (S) was calculated for yield as following Fischer and Maurer (1978). Data were collected on yield and yield contributing characters of wheat. The data were analyzed by partitioning the total variance with the help of a computer using the MSTATC program. The treatment means were compared using Tukey’s test at a 5% level of significance.

Source of Information: Bangladesh Agron. J. 2021, 24(1): 13-23

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Wheat genotypes BAW-1182 and BAW-1202 showed greater thermostability of cell membrane under heat stress conditions and came out with potential yield harvest. However, based on the heat susceptibility index for grain yield (under moderate and severe heat stress), BAW-1182 was found as most tolerant.

Knowledge Management: Journal