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Identifying QTLs for cold-induced resistance to Microdochium nivale in winter triticale

Published online by Cambridge University Press:  25 May 2011

Magdalena Szechyńska-Hebda
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland
Maria Wędzony*
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland Pedagogical University of Krakow, Podchorazych 2, Krakow30-084, Poland
Mirosław Tyrka
Affiliation:
Rzeszow University of Technology, Wincentego Pola 2, 35-959Rzeszów, Poland
Gabriela Gołębiowska
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland Pedagogical University of Krakow, Podchorazych 2, Krakow30-084, Poland
Małgorzata Chrupek
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland Rzeszow University of Technology, Wincentego Pola 2, 35-959Rzeszów, Poland
Ilona Czyczyło-Mysza
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland
Ewa Dubas
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland
Iwona Żur
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland
Elżbieta Golemiec
Affiliation:
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Krakow30-239, Poland
*
*Corresponding author. E-mail: niwedzon@cyf-kr.edu.pl

Abstract

Snow mould caused by Microdochium nivale (Fr.) Samuels & Hallett is the most widespread seedling disease in winter cereals. Due to the complexity of the resistance mechanisms, a poorly understood genetic background and strong interaction with winter weather conditions, it is difficult to assess the resistance of triticale cultivars via conventional inoculation methods. Genetic resistance is the most economical and environmental friendly way to control M. nivale infection; therefore, the objective of this study was to detect the quantitative trait loci (QTLs) associated with resistance components of winter triticale in a mapping population derived from a cross of the ‘Modus’ (partly resistant) and ‘SaKa 3006’ (sensitive) varieties. High-resolution mapping was conducted by using 1518 molecular markers (diversity arrays technology, simple sequence repeat and amplified fragment length polymorphism). Partial resistance components assessed in this study, i.e. candidate QTLs, were detected on chromosomes 1B, 2A, 3A, 3B, 5A, 5B, 6A, 6B and 7B, whereas QTLs describing overall seedling vitality in non-infected control plants were located on chromosomes 1B, 2B, 3A, 5A, 7B and 7R.

Type
Research Article
Copyright
Copyright © NIAB 2011

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