答案:【计分规则】: Wide cross refers to the hybridization between plants of different species, genera, or phylogenies that are further classified in botany.Its application in breeding is mainly reflected in the following aspects:1. Create new types of crops2. Improve the disease resistance and resistance of horticultural crops3. Induction of allopolyploid and haploid4. Produce male sterile line5. Take advantage of heterosis6. Study the evolution of living things