title: Interaction of gene effects with environments for malting quality of barley doubled haploids.
abstract: Barley doubled haploids covering a wide range of malting quality, along with their parental cultivars and F2, F3 hybrids, were investigated in six environments (three locations, two years) to study the genotype-environment (G x E) interaction structure and the influence of environments on additive, dominance and epistatic gene effects. Grain and malt characters, such as 1000-grain weight, percentage of plump kernels, malt extract yield, protein content, Kolbach index and malt fine-coarse difference (FCD), were measured. Main effects for genetic parameters were estimated and regression analysis was used to explain the interaction of gene effects with environments. The results show that additive effects had the greatest interaction with environments for all the analysed traits, but only for malt characters this interaction was linear. Interaction of dominance effects was much lower and only in the case of 1000-grain weight, protein content and Kolbach index it proved to be significant. The results suggest that effects of heterozygous loci are more stable in contrasting environments than effects of homozygous loci.
authors.affiliation: Institute of Plant Genetics, Polish Academy of Sciences, ul. Strzeszyńska 34, 60-479 Poznań, Poland. zkac@igr.poznan.pl
authors.forename: Zygmunt
authors.initials: Z
authors.lastname: Kaczmarek
authors.forename: Maria
authors.initials: M
authors.lastname: Surma
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Adamski
authors.forename: Stanisław
authors.initials: S
authors.lastname: Jezowski
authors.forename: Roman
authors.initials: R
authors.lastname: Madajewski
authors.forename: Karolina
authors.initials: K
authors.lastname: Krystkowiak
authors.forename: Anetta
authors.initials: A
authors.lastname: Kuczyńska
mesh_terms: D005838:Genotype; D006238:Haploidy; D001467:Hordeum / Q000235:genetics*