Evaluation of exotic wheat (Triticum aestivum L.) genotypes for heat tolerance on the basis of physiological phenotyping

Heat tolerance in exotic wheat genotypes

  • Kaji Md. Wayaz Hossain Department of Genetics & Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202
  • Sharif Ar Raffi Department of Genetics & Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202
Keywords: Heat tolerance; wheat; physiological traits

Abstract

Plant physiological parameters such as membrane thermostability, canopy temperature depression, leaf chlorophyll content and yield related traits like no. of spikelets per spike, no. of grains per spike, 200-grain weight and grain yield of 18 wheat genotypes were carried out to assess for heat tolerance. Performances of all the genotypes were found to have significant differences for all the traits except canopy temperature depression. But, canopy temperature depression with some other traits like leaf chlorophyll content, no. of grains per spike, 200-grain weight and grain yield per plant demonstrated significant differences when it grown in heat stress condition. In general, genotypes with higher leaf chlorophyll content and enhanced membrane thermostability demonstrated higher 200-grain weight or grain yield. Besides, in spite of having heat tolerant traits, several genotypes performed poor due to their poor genotypic potential. The present investigation has successfully isolated several genotypes viz. H024, H023, H022 and H018 with desirable traits related to heat tolerance based on overall performance while grown under heat stress. These genotypes can be used as gene source for future breeding program to improve heat tolerance of the local wheat cultivars.

J. Bangladesh Agril. Univ. 16(3): 457–463, December 2018

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Author Biographies

Kaji Md. Wayaz Hossain, Department of Genetics & Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202

Department of Genetics & Plant Breeding

Sharif Ar Raffi, Department of Genetics & Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202

Department of Genetics & Plant Breeding

Published
2018-12-27
How to Cite
Hossain, K., & Raffi, S. (2018). Evaluation of exotic wheat (Triticum aestivum L.) genotypes for heat tolerance on the basis of physiological phenotyping. Journal of the Bangladesh Agricultural University, 16(3), 457-463. https://doi.org/10.3329/jbau.v16i3.39417
Section
Crop Science