Mapping QTLs for Swimming Ability Related Traits in Cyprinus carpio L.
Sun, Muhammad Younis Laghari & Punhal Lashari & Xiaofeng Zhang & Peng Xu & Naeem Tariq Narejo & Yongxin Liu & Shahid Mehboob & K. Al-Ghanim & Yan Zhang & Xiaowen . 2014
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) forBH, 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.
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