Phenotypic and genotypic diversity in some bread wheat genotypes exposed to heat stress

Shahbaz, Umar; Waheed, Ummara; Siddique, Maria; Riaz, Nadia; Waseem Khan, Muhammad; Din, Shahab Ud; Raziq, Abdur; Jawad, Fahim Ali; Khan, Niaz Muhammad; Ullah, Hayat

doi:10.21608/ejar.2021.93770.1142

Phenotypic and genotypic diversity in some bread wheat genotypes exposed to heat stress

Document Type : Original Article

Authors

¹ School of Biotechnology, Jiangnan University, Wuxi China

² Institute of Plant Breeding and Biotechnology MNS University of Agriculture Multan

³ Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus

⁴ Department of Biotechnology, Faculty of Life Sciences and In

⁵ Institute of Biotechnology and Genetic Engineering, The University of Agriculture Peshawar

⁶ Department of Bioinformatics & Biotechnology, Faculty of Life Science, Government College University Faisalabad, Pakistan

⁷ Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad

⁸ Government College University Faisalabad

10.21608/ejar.2021.93770.1142

Abstract

Wheat is one of the earliest cultivated plants and second major cereal crop of the world that contains human food essentials. Due to climatic variations, crop is exposed to severe environmental conditions. Rising global temperature is expected to result in severe climate shift in future. High temperature exerts negative effects on wheat phenology and grain production. Selection of heat tolerant wheat germplasm is the best stress management strategy. Present research was planned to conduct field-based evaluation of 100 wheat genotypes under normal and heat stress conditions. The data of twelve phenotypic traits was recorded under control and heat stress trials. There were diverse variations observed among genotypes for morphological characters. The high yielding selected wheat lines 68.111-56, CHEN-84, CHEN-74, IWA8611400-65, CHEN-95, CHEN-96, CHEN-86, CHEN-80, 68.111-60 and CHEN-92 were subjected to DNA fingerprinting with Simple Sequence Repeat markers viz; WMC 18, CFA2129, WMC 367, CFD 48, WMC44 and WMC 798. The genetic diversity ranged from 0 to 0.25 with an average value of 0.06. Unweighted pair group of arithmetic means cluster analysis grouped these lines into clusters. Most of the genetic diversity was observed for CHEN-74 and CHEN-96 in cluster. The study has identified genetically diverse, heat tolerant and high yielding wheat genotypes with possible exploitation in development of climate smart wheat varieties.

Keywords