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

  • Magdalena Szechyńska-Hebda (a1), Maria Wędzony (a1) (a2), Mirosław Tyrka (a3), Gabriela Gołębiowska (a1) (a2), Małgorzata Chrupek (a1) (a3), Ilona Czyczyło-Mysza (a1), Ewa Dubas (a1), Iwona Żur (a1) and Elżbieta Golemiec (a1)...
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.

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Corresponding author
*Corresponding author. E-mail: niwedzon@cyf-kr.edu.pl
References
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Plant Genetic Resources
  • ISSN: 1479-2621
  • EISSN: 1479-263X
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