Mapping significant size-related QTL.
A, QTL for shell length on LG7; B, QTL for total weight on LG10. QTL were detected with genome-wide threshold. The QTL names are on the left of each box-bar. The significance of Kruskal-Wallis analyses are shown at the right side of linkage group (**P<0.05, *** P<0.01, ****P<0.005, ***** P<0.001).