Identification of Quantitative Trait Loci Conditioning the Main Biomass Yield Components and Resistance to Melampsora spp. in Salix viminalis × Salix schwerinii Hybrids.
The biomass ofSalix viminalisis the most highly valued source of green energy, followed byS. schwerinii,S. dasycladosand other species. Significant variability in productivity and leaf rust resistance are noted both within and among willow species, which creates new opportunities for improving willow yield parameters through selection of desirable recombinants supported with molecular markers. The aim of this study was to identify quantitative trait loci (QTLs) linked with biomass yield-related traits and the resistance/susceptibility ofSalixmapping population to leaf rust. The experimental material comprised a mapping population developed based onS. viminalis×S. schweriniihybrids. Phenotyping was performed on plants grown in a field experiment that had a balanced incomplete block design with 10 replications. Based on a genetic map, 11 QTLs were identified for plant height, 9 for shoot diameter, 3 for number of shoots and 11 for resistance/susceptibility to leaf rust. The QTLs identified in our study explained 3%-16% of variability in the analyzed traits. Our findings make significant contributions to the development of willow breeding programs and research into shrubby willow crops grown for energy.
Department of Plant Breeding and Seed Production, University of Warmia and Mazury in Olsztyn, Plac Łódzki 3, 10-724 Olsztyn, Poland. pawel.sulima@uwm.edu.pl.
Paweł
P
Sulima
Department of Plant Breeding and Seed Production, University of Warmia and Mazury in Olsztyn, Plac Łódzki 3, 10-724 Olsztyn, Poland. jerzy.przyborowski@uwm.edu.pl.
Jerzy A
JA
Przyborowski
Department of Plant Breeding and Seed Production, University of Warmia and Mazury in Olsztyn, Plac Łódzki 3, 10-724 Olsztyn, Poland. anna.kuszewska@uwm.edu.pl.
Anna
A
Kuszewska
Department of Plant Breeding and Seed Production, University of Warmia and Mazury in Olsztyn, Plac Łódzki 3, 10-724 Olsztyn, Poland. dariusz.zaluski@uwm.edu.pl.
Dariusz
D
Załuski
Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland. mjed@igr.poznan.pl.
Małgorzata
M
Jędryczka
Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland. wirz@igr.poznan.pl.
Witold
W
Irzykowski
D001487:Basidiomycota; D018533:Biomass; D002678:Chimera; D002874:Chromosome Mapping; D060467:Disease Resistance / Q000235:genetics*; D004198:Disease Susceptibility; D056726:Genetic Association Studies; D008040:Genetic Linkage; D010935:Plant Diseases / Q000235:genetics / Q000276:immunology / Q000382:microbiology; D040641:Quantitative Trait Loci; D019655:Quantitative Trait, Heritable; D032108:Salix / Q000235:genetics* / Q000382:microbiology*
QTL; Salix; biomass willow; leaf rust resistance