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Turkish Journal of Fisheries and Aquatic Sciences 2019, Vol 19, Num, 11     (Pages: 969-975)

Mapping and Validation of QTLs Associated with Growth Trait in a F1 Family of Freshwater Sleeper Odontobutis potamophila

Hongwei Zhang 1-2 ,Shaowu Yin 1-2 ,Xinru Li 1-2 ,Yandong Ding 1-2

1 Nanjing Normal University, College of Life Sciences, Jiangsu Key Laboratory for Biodiversity and Biotechnology, Nanjing, Jiangsu 210023, China
2 Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, LianYungang, Jiangsu 222005, China
DOI : 10.4194/1303-2712-v19_11_08 Viewed : 3074 - Downloaded : 2493 In the present study, 43 quantitative trait loci (QTL) associated with body length and body weight were identified based on the high density genetic map of O. potamophila composed of 6,311 SLAF markers. The phenotypic variance explained by these QTLs (Expl.%) were ranging from 11.9% to 15.4% and the threshold of logarithm of odds (LOD) score is 3. The 43 QTLs from O. potamophila were validated by Sanger sequencing. In total, 10 QTLs were validated as the true QTL associated with body length and body weight for the fish. It shows that the growth traits of O. potamophila were likely controlled by 10 QTLs distributed on three genetic linkage groups (LG4, LG6 and LG16). We found marker24165 was both associated with body length and associated with body weight, which will be useful in marker-assisted selection studies for the fish. Moreover, the 10 QTLs associated with growth traits will be used for identification of fast growth family or strain of O. potamophila in the future. Keywords : Odontobutis potamophila, SLAF-Seq, SNP marker, QTL validation, Growth traits