Quantitative trait loci (QTL) associated with growth rate trait in common carp ( Cyprinus carpio )
- PDF / 337,944 Bytes
- 7 Pages / 439.37 x 666.142 pts Page_size
- 66 Downloads / 233 Views
Quantitative trait loci (QTL) associated with growth rate trait in common carp (Cyprinus carpio) Muhammad Younis Laghari • Yan Zhang • Punhal Lashari Xiaofeng Zhang • Peng Xu • Baoping Xin • Xiaowen Sun
•
Received: 9 November 2012 / Accepted: 20 March 2013 / Published online: 28 March 2013 Ó Springer Science+Business Media Dordrecht 2013
Abstract Growth rate is one of the important economic traits in aquaculture species that is influenced by quantitative trait loci (QTLs). Recently published complete genetic map of common carp (Cyprinus carpio) with 307 markers (including 109 SSR, 31 EST-SSR and 167 SNP markers) was used to determine the number and position of QTLs effecting body weight (BW) and growth rate. Ten-, 11- and 12-month-old individuals of common carp were measured, and seven QTLs were detected in three linkage groups (LG1, LG6 and LG20); three were significant QTLs (qBW2-6, qBW3-6 and qBW3-20, P \ 0.001), and four were suggestive QTLs (qBW1-1, qBW1-6, qBW2-20 and qBW3-1, P \ 0.01). The three significant QTLs related to BW2 and BW3 were in LG6 and LG20 and covered 18 and 41 cM, respectively. The explained variances of qBW2-6, qBW3-6 and qBW3-20 were 34.4, 32.1 and 33.4 %, respectively. The four suggestive QTLs affecting BW1, BW2 and BW3 were in LG1, LG6 and LG20 and had variances that ranged from 17.9 to 26.7 %. The similarity of the QTL intervals for BW1, BW2 and BW3 in LG6 suggested that these genes may affect growth continuously during the early stage of growth and may be important for growth. The identification of QTLs for growth rate and BW in C. carpio will lead to a better understanding of the factors that influence these traits at a genetic level and will promote the growth to higher production through marker-assisted breeding. Keywords
Body weight Cyprinus carpio Growth rate QTL
M. Y. Laghari B. Xin School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, China e-mail: [email protected] M. Y. Laghari Y. Zhang P. Lashari X. Zhang P. Xu X. Sun (&) Centre for Applied Aquatic Genomics, Chinese Academy of Sciences, Beijing, China e-mail: [email protected] M. Y. Laghari P. Lashari Department of Fresh Water Biology and Fisheries, University of Sindh, Jamshoro, Pakistan
123
1374
Aquacult Int (2013) 21:1373–1379
Introduction Growth rate is an important fitness trait that affects survival and fecundity across a wide range of taxa (Arendt 1997) and controlled by interdependent gene expression interacting with environmental factors (Wang et al. 2002; Wringe et al. 2010). It is one of the most important economic traits, to improve production in aquaculture species through markerassisted selection program. Environmental factors directly or indirectly influence the growth rates, quantitative genetics studies investigating the heritability of growth (Kause et al. 2002; Tobin et al. 2006). In many aquaculture species, growth rate is naturally slow, despite of that efforts have been made to increase the growth rate by traditional method of domestic
Data Loading...
