s3 Modes of Cross and the Techniques 杂交方式和技术 1. Modes of Cross: Number of parents Modes of combination (1) Single Cross AXB or A/b(Cytoplasm from A) BXA or b/a(Cytoplasm from B) (2) Multiple cross 1) Three way cross (A×B)×CorA/B∥C( Cytoplasm ofA,C=1/2)§3 Modes of Cross and the Techniques 杂交方式和技术 1. Modes of Cross: Number of parents Modes of combination (1) Single Cross A×B or A/B (Cytoplasm from A) B×A or B/A (Cytoplasm from B) (2) Multiple Cross 1）Three way cross (A×B)×C or A/B//C （Cytoplasm of A,C=1/2)