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Mapping of Quantitative Trait Loci for Traits linked to Fusarium Head Blight Symptoms Evaluation In Barley RILs

Piotr Ogrodowicz, View ORCID ProfileAnetta Kuczyńska, Krzysztof Mikołajczak, Tadeusz Adamski, Maria Surma, Paweł Krajewski, View ORCID ProfileHanna Ćwiek-Kupczyńska, Michał Kempa, Michał Rokicki, Dorota Jasińska
doi: https://doi.org/10.1101/751552
Piotr Ogrodowicz
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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Anetta Kuczyńska
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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  • For correspondence: akuc@igr.poznan.pl
Krzysztof Mikołajczak
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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Tadeusz Adamski
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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Maria Surma
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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Paweł Krajewski
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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Hanna Ćwiek-Kupczyńska
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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Michał Kempa
Institute of Plant Genetics, Academy of Sciences, Strzeszynska Str. 34, 60-479 Poznan, Poland
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Michał Rokicki
Poznan Plant Breeding Station, Kasztanowa 5, 63-004 Tulce, Poland
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Dorota Jasińska
Poznan Plant Breeding Station, Kasztanowa 5, 63-004 Tulce, Poland
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Abstract

Fusarium head blight (FHB) is a devastating disease in small grain cereals worldwide. The disease results in the reduction of grain yield and affects its quality. In addition, mycotoxins accumulated in grain are harmful to both humans and animals. It has been reported that response to pathogen infection may be associated with the morphological and developmental characteristics of the host plant, e.g. the earliness and plant height. Despite the many studies the effective markers for the selection of barley genotypes with increased resistance to FHB have not thus far been developed. Therefore, exploring the genetic relationship between agronomic traits (e.g. heading date or stem height) and disease resistance is of importance to the understanding of plant resistance via “diesease escape” or dwarf stature. The studied plant material consisted of 100 recombinant inbred lines (RIL) of spring barley. Plants were examined in field conditions (three locations) in a completely randomized design with three replications. Barley genotypes were artificially infected with spores of Fusarium before heading. Apart from the main phenotypic traits (plant height, spike characteristic, grain yield) the infected kernels were visually scored and the content of deoxynivalenol (DON) mycotoxin was investigated. A set of 70 Quantitative Trait Loci (QTLs) were detected through phenotyping of the mapping population in field condition and genotyping using a barley Ilumina iSelect platform with 9K markers. Six loci were detected for FHB index on chromosomes 2H, 3H, 5H and 7H. The region on the short arm of the 2H chromosome was detected in the current study, in which many QTLs associated with FHB- and yield-related characters were found. This study confirms that agromorphological traits are tightly related to the FHB and should be taken into consideration when breeding barley plants for FHB resistance.

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Posted August 29, 2019.
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Mapping of Quantitative Trait Loci for Traits linked to Fusarium Head Blight Symptoms Evaluation In Barley RILs
Piotr Ogrodowicz, Anetta Kuczyńska, Krzysztof Mikołajczak, Tadeusz Adamski, Maria Surma, Paweł Krajewski, Hanna Ćwiek-Kupczyńska, Michał Kempa, Michał Rokicki, Dorota Jasińska
bioRxiv 751552; doi: https://doi.org/10.1101/751552
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Mapping of Quantitative Trait Loci for Traits linked to Fusarium Head Blight Symptoms Evaluation In Barley RILs
Piotr Ogrodowicz, Anetta Kuczyńska, Krzysztof Mikołajczak, Tadeusz Adamski, Maria Surma, Paweł Krajewski, Hanna Ćwiek-Kupczyńska, Michał Kempa, Michał Rokicki, Dorota Jasińska
bioRxiv 751552; doi: https://doi.org/10.1101/751552

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