Genotype × environment interaction patterns of dry matter yield in meadow brome, orchardgrass, tall fescue, and timothy evaluated at harsh winter sites  

作　　者：Joseph G.Robins Bill Biligetu Annie Claessens Nityananda Khanal Sean R.Asselin Michael P.Schellenberg 

机构地区：[1]United States Department of Agriculture,Logan,Utah,USA [2]Department of Plant Sciences,University of Saskatchewan,Saskatoon,Saskatchewan,Canada [3]Agriculture and Agri-Food Canada,Québec,Québec,Canada [4]Agriculture and Agri-Food Canada,Beaverlodge,Alberta,Canada [5]Agriculture and Agri-Food Canada,Swift Current,Saskatchewan,Canada

出　　处：《Grassland Research》2024年第2期147-154,共8页草地研究（英文）

摘　　要：Background:Genotype×environment interaction(GEI)slows genetic gains and complicates selection decisions in plant breeding programs.Forage breeding program seed sales often encompass large geographic regions to which the cultivars may not be adapted.An understanding of the extent of GEI in perennial,cool-season forage grasses will facilitate improved selection decisions and end-use in areas with harsh winters.Methods:We evaluated the dry matter yield of nine meadow brome(Bromus biebersteinii Roemer&J.A.Schultes),nine orchardgrass(Dactylis glomerata L.),seven tall fescue(Lolium arundinaceum(Schreb.)Darbysh.),and 10 timothy(Phleum pratense L.)cultivars or breeding populations at seven high latitude and/or elevation locations in Canada and the United States from 2019 to 2021.Results:For each of the species,we found significant differences among the genotypes for dry matter yield across environments and found significant levels of GEI.Using site regression analysis and GGE biplot visualizations,we then characterized the extent of the interactions in each species.Except for tall fescue,there was little evidence for the broad adaptation of genotypes across locations.Conclusions:This research adds further evidence to the limitations of perennial,forage breeding programs to develop widely adapted cultivars and the need to maintain regional breeding efforts.

关 键 词：cool-season forage grass forage yield genotype×environment interaction 

分 类 号：S812[农业科学—草业科学]