Physiological and agronomic assessment of tolerance to drought of perspective breeding lines common winter wheat

Radoslav Chipilski and Zlatina Uhr
Agricultual Academy, Institute of Plant Genetic Resources, 4122 Sadovo, Bulgaria

Abstract

Chipilski, R. & Uhr, Z. (2021). Physiological and agronomic assessment of tolerance to drought of perspective breeding lines common winter wheat. Bulg. J. Agric. Sci., 27 (2), 297–303

Physiological and agronomic assessments of tolerance to drought of eight breeding lines of common winter wheat were done during period 2015-2017. The aim of the study was to make a comprehensive assessment of the potential of genotypes of common winter wheat to overcome different drought intensities using various types of trials. The highest yield of a micro field trial was recorded for the breeding lines MX 268/1008, МХ 270/50, МХ 270/28 and МХ 270/24. The most intense morphometric indexes of the leaves were taken into account for MX 247/33, MX 270/24 and MX 270/86, while morphological markers for drought resistance were distinguished by the breeding lines MX 268/1008, MX 187/3 and MX 270/24. The most tolerant response to controlled drought in young plants developed in vegetation pot experiments was found in MX 270/50, MX 187/3, MX 268/1008 and MX 270/24. In conclusion the genotypes МХ 270/24, МХ 187/3 and МХ 268/1008 were considered as high yielding and they also showed good physiological performance under drought stress conditions.

Keywords: common winter wheat; physiological assessment; agronomic assessment; drought, yield

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