Comparison of Amplification Effects on Apricot (Prunus armeniaca L.) Resources in China Using Different Primer Combinations Inheritance of S-gene among the F1 Progenies in Apricot Inheritance of S-gene among the F1 Progenies in Apricot Molecular Cloning and Characterization of PbSFBB13-gamma from Chinese White Pear (Pyrus bretschneideri) Comparison of Amplification Effects on Apricot (Prunus armeniaca L.) Resources in China Using Different Primer Combinations Study on identification of S-genotypes of Chinese pear cultivars