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Plant survival after freezing in wheat ‘Cappelle Desprez’ (‘Bezostaya 1’) intervarietal chromosome substitution lines

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The effect of individual chromosomes of the wheat variety ‘Bezostaya 1’ on plant resistance to low temperatures was studied using the available set of intervarietal ‘Cappelle Desprez’ (‘Bezostaya 1’) chromosome substitution lines. The number of plants surviving after freezing at −12, −15 and −17°C was determined for both parents and lines in trials in 2004/2005 and 2005/2006. Significant differences between the three temperature treatments and between lines were found, implying that two factors, the level of temperature stress and chromosome substitutions, were influencing plant survival. Improved frost resistance in both trials was associated with genes located on five chromosomes: 5A, 2D, 4A, 5D and 6A. An increase in the plant frost resistance because of the effects of 7A and 1A chromosomes was also observed in the 2005/2006 trial, when the overall autumn and winter (January) temperatures were lower than in 2004/2005.
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Keywords: Triticum aestivum; chromosome substitution lines; freezing resistance; plant survival; wheat

Document Type: Research Article

Affiliations: 1: Institute of Genetics, Sofia 1113, Bulgaria 2: Dobroudja Agricultural Institute, General Toshevo 9520, Bulgaria 3: John Innes Centre, Norwich Research Park, Colney, Norwich NR4 7UH, UK

Publication date: 01 April 2008

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