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Evaluation of wild barley species as possible sources of drought tolerance for arid environments

Published online by Cambridge University Press:  11 May 2017

Mohammad Barati ,
Mohammad Mahdi Majidi ,
Fateme Mostafavi ,
Aghafakhr Mirlohi ,
Maryam Safari  and
Zohre Karami
Mohammad Barati
Affiliation:
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
Mohammad Mahdi Majidi*
Affiliation:
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
Fateme Mostafavi
Affiliation:
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
Aghafakhr Mirlohi
Affiliation:
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
Maryam Safari
Affiliation:
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
Zohre Karami
Affiliation:
Department of Plant Breeding and Biotechnology, College of Agriculture, Shahrekord University, Shahrekord, 88186-34141, Iran
*
*Corresponding author. E-mail: majidi@cc.iut.ac.ir
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Abstract

In this study, agro-morphological and yield-related traits associated with drought tolerance in 80 barley genotypes belonging to 15 wild species together with the cultivated one, and their potential to improve adaptation to different levels of drought stress conditions (moisture environments) were studied. There was significant genetic variation among the genotypes and species for all of the measured traits, as well as differential responses of genotypes across environments. The results indicated high variation for grain yield (GY) under drought stress among the genotypes, and that some of the wild genotypes had consistently superior specific adaptation to the water stress conditions. The genotypes belong to wild barley species, especially Hordeum murinum and Hordeum marinum had lower GY but relatively higher yield stability under different environments. Traits such as number of seed per plant and hundred kernel weight were positively correlated with GY in all of the environments. High negative correlation between GY and days to ripening was observed only under intense drought environment, showing drought escape as a strategy of wild plants under highly stressed conditions. Grouping of the genotypes by principal component analysis completely separated cultivated barley and its progenitor (Hordeum vulgare ssp. spontaneum) from other wild genotypes; however, the other wild species were slightly separated from each other. In addition, the Iranian and foreign genotypes did not completely separate from each other. The identified wild barley genotypes with favourable characters and high drought tolerance could be used in genetic studies and barley improvement programmes especially for drought stress.

Keywords

barleyclimate changesdroughtspecific adaptationwild relatives
Type
Research Article
Information
Plant Genetic Resources , Volume 16 , Issue 3 , June 2018 , pp. 209 - 217
Copyright
Copyright © NIAB 2017 

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