Agronomic, physiological and molecular characterization of spring wheat (Triticum aestivum L.) accessions for drought tolerance

Authors

  • Muhammad Qadir Ahmad Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
  • Muhammad Farooq Naseer Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
  • Abdul Qayyum Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
  • Sami ul-Allah College of Agriculture, BZU Bahadur Subcampus, Layyah, Pakistan
  • Waqas Malik Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
  • Sultan Habibullah Khan U.S. Pakistan Centre for Advanced Studies in Agriculture and Food Security, University of Agriculture Faisalabad, Pakistan
  • Etrat Noor Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
  • Muhammad Sajjad Department of Biosciences, COMSATS University Islamabad (CUI), Park Road, Islamabad 45550, Pakistan

DOI:

https://doi.org/10.3329/bjb.v49i1.49088

Keywords:

Spring wheat, Genetic diversity, Drought tolerance, ISSR, Molecular characterization

Abstract

A comprehensive study was conducted to investigate (i) the effect of drought stress on genetic association among various yield traits and (ii) molecular and phenotypic diversity in the selected spring wheat accessions. A panel of 24 spring wheat accessions was evaluated under normal irrigation and drought stress. Data were collected for chlorophyll contents, canopy temperature, days to heading, grain filling period, relative water content, plant height, peduncle length, number of kernels per spike, 1000-kernel weight and grain yield. Analysis of variance depicted significant differences for genotypes (G), effect of treatment (T) and interaction between T and G. Correlation analysis revealed that genetic association among various traits was stronger in normal treatment than water stressed. The Biplot analysis grouped the genotypes into tolerant and susceptible groups. Molecular characterization of tolerant and susceptible genotypes was done with 14 ISSR markers. ISSR primers revealed a mean of 0.63 genetic similarities among genotypes. Polymorphism information content (PIC) values varied from 0.24 to 0.49. The genetic diversity in selected germplasm can be used to develop drought tolerant lines considering the changing pattern of traits association under drought stress.

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Published

2020-03-31

How to Cite

Ahmad, M. Q., Naseer, M. F., Qayyum, A., ul-Allah, S., Malik, W., Khan, S. H., Noor, E., & Sajjad, M. (2020). Agronomic, physiological and molecular characterization of spring wheat (Triticum aestivum L.) accessions for drought tolerance. Bangladesh Journal of Botany, 49(1), 29–38. https://doi.org/10.3329/bjb.v49i1.49088

Issue

Vol. 49 No. 1 (2020)

Section

Articles

License

© Bangladesh Botanical Society

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