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Title: QTLs for earliness and yield-forming traits in the Lubuski x CamB barley RIL population under various water regimes
Authors: Ogrodowicz, Piotr
Adamski, Tadeusz
Mikołajczak, Krzysztof
Kuczyńska, Anetta
Surma, Maria
Krajewski, Paweł
Sawikowska, Aneta
Górny, Andrzej
Gudyś, Kornelia
Szarejko, Iwona
Guzy-Wróbelska, Justyna
Krystkowiak, Karolina
Keywords: Consensus map; Drought; Earliness; SNP annotation; SNP markers; Spring barley; SSR markers
Issue Date: 2017
Citation: Journal of Applied Genetics, Vol. 58, iss. 1 (2017), s. 49-65
Abstract: Drought has become more frequent in Central Europe causing large losses in cereal yields, especially of spring crops. The development of new varieties with increased tolerance to drought is a key tool for improvement of agricultural productivity. Material for the study consisted of 100 barley recombinant inbred lines (RILs) (LCam) derived from the cross between Syrian and European parents. The RILs and parental genotypes were examined in greenhouse experiments under well-watered and water-deficit conditions. During vegetation the date of heading, yield and yield-related traits were measured. RIL population was genotyped with microsatellite and single nucleotide polymorphism markers. This population, together with two other populations, was the basis for the consensus map construction, which was used for identification of quantitative trait loci (QTLs) affecting the traits. The studied lines showed a large variability in heading date. It was noted that drought-treatment negatively affected the yield and its components, especially when applied at the flag leaf stage. In total, 60 QTLs were detected on all the barley chromosomes. The largest number of QTLs was found on chromosome 2H. The main QTL associated with heading, located on chromosome 2H (Q.HD.LC-2H), was identified at SNP marker 5880–2547, in the vicinity of Ppd-H1 gene. SNP 5880–2547 was also the closest marker to QTLs associated with plant architecture, spike morphology and grain yield. The present study showed that the earliness allele from the Syrian parent, as introduced into the genome of an European variety could result in an improvement of barley yield performance under drought conditions.
Description: This work was supported by the European Regional Development Fund through the Innovative Economy Programme 2007?2013, project WND-POIG.01.03.01?00?101/08 POLAPGEN-BD "Biotechnological tools for breeding cereals with increased resistance to drought".
DOI: 10.1007/s13353-016-0363-4
ISSN: 1234-1983
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