title: Identification of QTL underlying physiological and morphological traits of flag leaf in barley.
abstract: BACKGROUND
  Physiological and morphological traits of flag leaf play important roles in determining crop grain yield and biomass. In order to understand genetic basis controlling physiological and morphological traits of flag leaf, a double haploid (DH) population derived from the cross of Huaai 11 × Huadamai 6 was used to detect quantitative trait locus (QTL) underlying 7 physiological and 3 morphological traits at the pre-filling stage in year 2012 and 2013.
  
  
  RESULTS
  Total of 38 QTLs distributed on chromosome 1H, 2H, 3H, 4H, 6H and 7H were detected, and explained 6.53% - 31.29% phenotypic variation. The QTLs flanked by marker Bmag829 and GBM1218 on chromosome 2H were associated with net photosynthetic rate (Pn), stomatal conductance (Gs), flag leaf area (LA), flag leaf length (FLL), flag leaf width (FLW), relative chlorophyll content (SPD) and leaf nitrogen concentration (LNC).
  
  
  CONCLUSIONS
  Two QTL cluster regions associated with physiological and morphological traits, one each on the chromosome 2H and 7H, were observed. The two markers (Bmag829 and GBM1218) may be useful for marker assisted selection (MAS) in barley breeding.
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China. liulipan19861220@126.com.
authors.forename: Lipan
authors.initials: L
authors.lastname: Liu
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China. genlou.sun@smu.ca.|Biology Department, Saint Mary's University, 923 Robie Street, Halifax, NS, B3H 3C3, Canada. genlou.sun@smu.ca.
authors.forename: Genlou
authors.initials: G
authors.lastname: Sun
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China. renxifeng@mail.hzau.edu.cn.
authors.forename: Xifeng
authors.initials: X
authors.lastname: Ren
authors.affiliation: Department of Agriculture and Food/Agricultural Research Western Australia, 3 Baron-Hay Court, South Perth, WA, 6155, Australia. chengdao.li@agric.wa.gov.au.
authors.forename: Chengdao
authors.initials: C
authors.lastname: Li
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China. sundongfa1@mail.hzau.edu.cn.|Hubei Collaborative Innovation Center for Grain Industry, Wuhan, 430070, China. sundongfa1@mail.hzau.edu.cn.
authors.forename: Dongfa
authors.initials: D
authors.lastname: Sun
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D002874:Chromosome Mapping; D056726:Genetic Association Studies; D001467:Hordeum / Q000235:genetics*; D009584:Nitrogen / Q000378:metabolism; D010641:Phenotype; D010788:Photosynthesis; D018515:Plant Leaves / Q000235:genetics*; D040641:Quantitative Trait Loci; D019655:Quantitative Trait, Heritable
chemical_list: D002734:Chlorophyll; D002245:Carbon Dioxide; D009584:Nitrogen