title: Construction of high-density genetic linkage maps for orange-spotted grouper Epinephelus coioides using multiplexed shotgun genotyping.
abstract: BACKGROUND
  Orange-spotted grouper, Epinephelus coioides, is one of the most valuable fish species in China. Commercial production of orange-spotted grouper could be increased by developing higher growth rates and improving commercially important traits. Information on genetic markers associated with quantitative trait loci (QTL) can be used in breeding programs to identify and select individuals carrying desired traits. A high-density genetic linkage map is the basis for QTL study, and multiplexed shotgun genotyping (MSG) facilitates the development of single nucleotide polymorphisms (SNPs) and genotyping. In this study, the first high-density genetic linkage maps for groupers were generated on the basis of the MSG method.
  
  
  RESULTS
  The sex-averaged map contained a total of 4,608 SNPs, which spanned 1581.7 cM, with a mean distance between SNPs of 0.34 cM. The 4,608 SNPs were located in 2,849 unique locations on the linkage map, with an average inter-location space at 0.56 cM. There were 2,516 SNPs on the female map, and the number of unique locus was 1,902. However, the male map contained more numbers of SNP (2,939) and unique locations (2,005). The total length of the female and male maps was 1,370.9 and 1,335.5 cM, respectively.
  
  
  CONCLUSIONS
  The high-resolution genetic linkage maps will be very useful for QTL analyses and marker-assisted selection (MAS) for economically important traits in molecular breeding of the orange-spotted grouper.
authors.forename: Xinxin
authors.initials: X
authors.lastname: You
authors.forename: Liping
authors.initials: L
authors.lastname: Shu
authors.forename: Shuisheng
authors.initials: S
authors.lastname: Li
authors.forename: Jieming
authors.initials: J
authors.lastname: Chen
authors.forename: Jian
authors.initials: J
authors.lastname: Luo
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.forename: Qian
authors.initials: Q
authors.lastname: Mu
authors.forename: Jie
authors.initials: J
authors.lastname: Bai
authors.forename: Qiuju
authors.initials: Q
authors.lastname: Xia
authors.forename: Qingchun
authors.initials: Q
authors.lastname: Chen
authors.forename: Yanjie
authors.initials: Y
authors.lastname: Cai
authors.forename: Haifa
authors.initials: H
authors.lastname: Zhang
authors.forename: Guohua
authors.initials: G
authors.lastname: Chen
authors.forename: Haoran
authors.initials: H
authors.lastname: Lin
authors.affiliation: School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China. lsszy@mail.sysu.edu.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qiong
authors.initials: Q
authors.lastname: Shi
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D005260:Female; D008040:Genetic Linkage; D016678:Genome / Q000235:genetics*; D005838:Genotype; D059014:High-Throughput Nucleotide Sequencing; D008297:Male; D010473:Perciformes / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D040641:Quantitative Trait Loci