8 1 The Conception and Significance of Cross Breeding 杂交育种的概念和意义 What is Cross Breeding? P85 Crossing with different genotypes Trials for identification and selection New cultivar(s) Types of Cross Breeding Combination Breeding组合育种: Combination of diff. genes Transgression Breeding超亲育种 Accumulation of minor poly- g enes1. What is Cross Breeding? P.85 Crossing with different genotypes Trials for identification and Selection New cultivar(s) Types of Cross Breeding: §1 The Conception and Significance of Cross Breeding 杂交育种的概念和意义 ✓ Combination Breeding 组合育种：Combination of diff. genes ✓ Transgression Breeding 超亲育种: Accumulation of minor poly￾genes