Abstract
A group of F2 hybrids of mirror carp including 68 individuals was used to construct a linkage map using JoinMap4.0 software. Of 560 markers genotyped, 507 markers (143 SSR markers, 33 EST-SSR markers, and 321 SNP markers) were assigned to the map, which comprised of 62 linkage groups. Quantitative traits loci (QTLs) associated with body length were identified by interval mapping of the software MapQTL 5.0. A linkage group wide permutation test (1 000 replicates) determined the significance of the maximum LOD value over the various intervals analyzed for each linkage group. Twelve QTLs were identified for body length on the linkage groups of BL-1-1 (SNP0137-SNP1481), BL-4-1 (SNP0092-HLJ797), BL-5-1 (SNP1268-HLJ423), BL-7-1 (HLJ870-SNP0702), BL-12-1 (SNP0922-HLJ639), BL-16-1 (HLJE351-SNP0674), BL-25-1 (SNP0394-SNP0862), BL-35-1 (HLJ668-SNP0832), BL-43-1 (SNP0389-SNP1425), BL-47-1 (HLJ057-HLJ1113), BL-47-2 (HLJ1439-HLJ14180), which explained 13.8% to 64.9% of the total variation of body length. Eight major QTLs explained over 20% of the phenotypic variation, which were major QTLs associated with the body length of mirror carp.
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