QTL analysis for cultivated traits in pears

Abstract：【Objective】To develop molecular markers linked with cultivated traits for molecular markerassisted selection through detected QTL loci of pear cultivated traits.【Methods】The 161 F1 individuals from the cross between‘Red Clapp Favorite' (Pyrus communis L.) and‘Mansoo' (P. pyrifolia Nakai) were used for the high-density genetic map construction.The pear cultivated trait QTLs including annual branch length, annual branch thickness, internode length, leaf length, leaf width and petiole length were analyzed with the MapQTL5.0 software.【Results】One annual branch length QTL was detected on LG9, and the annual branch thickness QTL was detected on LG11 and LG9, and the internode length QTL was detected on LG7.The distance between these QTLs and the nearest SNP marker was 0 cM.No QTL loci were detected for the leaf length, leaf width and petiole length.【Conclusion】Four QTLs of three traits were detected, which achieved at >95% confidence level.