title: Mapping QTLs for swimming ability related traits in Cyprinus carpio L.
abstract: Body height (BH), head length (HL), snout length (SL), and tail length (TL) are important traits related with swimming ability of fish. Therefore, improving these traits will increase the production which is the basic goal of aquaculture breeding. To understand the genetic basis of swimming ability related traits in Cyprinus carpio L., a high-density linkage map spanning 3,301 cM in 50 linkage groups was utilized for quantitative trait locus (QTL) mapping. Mapping family comprised 190 offspring and 627 molecular markers were genotyped with average distance of 5.6 cM. A total of 15 QTLs including four (qBH13, qBH30, qBH33, qBH48) for BH, four (qHL10, qHL18, qHL29, qHL48) for HL, three (qSL24, qSL27, qSL45) for SL, and four (qTL15, qTL17, qTL18, qTL44) for TL were detected on 13 linkage groups LG10, LG13, LG15, LG17, LG18, LG24, LG27, LG29, LG30, LG33, LG44, LG45, and LG48. Each LG consisted on single QTL except LG18 and LG48. LG18 was found with two QTLs associated with HL and TL. While LG48 was comprised, the QTLs related with BH and HL. The phenotype variance was recorded from 12.6 to 40.6 %. Five QTLs, qHL48, qSL45, qTL15, qTL18, and qTL44, explained phenotype variance of >20 % with a significant levels of 0.047, 0.049, 0.037, 0.025, and 0.023, respectively. The neighbored loci of these QTLs were considered as main region of chromosomes controlling the traits. These identified genetic regions will be the main source of discovering gene(s) associated with swimming ability related traits in C. carpio L.
authors.affiliation: Centre for Applied Aquatic Genomics, Chinese Academy of Sciences, Beijing, 100141, China, laghariyounis@yahoo.com.
authors.forename: Muhammad Younis
authors.initials: MY
authors.lastname: Laghari
authors.forename: Punhal
authors.initials: P
authors.lastname: Lashari
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Zhang
authors.forename: Peng
authors.initials: P
authors.lastname: Xu
authors.forename: Naeem Tariq
authors.initials: NT
authors.lastname: Narejo
authors.forename: Yongxin
authors.initials: Y
authors.lastname: Liu
authors.forename: Shahid
authors.initials: S
authors.lastname: Mehboob
authors.forename: K
authors.initials: K
authors.lastname: Al-Ghanim
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Sun
mesh_terms: D000818:Animals; D017756:Aquaculture / Q000379:methods*; D049628:Body Size / Q000235:genetics; D001837:Body Weights and Measures; D002347:Carps / Q000235:genetics* / Q000502:physiology*; D002874:Chromosome Mapping / Q000662:veterinary*; D010641:Phenotype; D040641:Quantitative Trait Loci / Q000235:genetics*; D013550:Swimming / Q000502:physiology*