Sexual Crossing Breeding and Transformation Gene Breeding of Crops

In this paper on basis of feature of sexual crossing breeding and transforming gene breeding: breeding nature, relationship between the two, limitations of molecule breeding operation and amazingly high input, affects of production of Original Theory of Botany (Crop Science) on the two breeding ways were discussed to determine these foreground and future relations. Molecule breeding was a closed breeding that cannot increase yielding ability and it always cannot do without sexual crossing breeding that gave acceptor. Only sexual crossing breeding was an open breeding that can increase yielding ability. Only rely on molecule breeding operation cannot produce whole plant and cannot accomplish generation transmission. Amazingly high input of transformation gene breeding made it hard to continue, especially basic research of molecule breeding consumed maximum made it difficult to conduct, and the duration was too long to lead to the lose outweighs the gain. Production of Original Theory of Botany (Crop Science) was especially advantageous for sexual crossing breeding and made it successfully transforming into scientific breeding and increasing breeding effect in big range. Sexual crossing breeding will become always leading breeding way, but transformation gene breeding or molecule breeding supplementary.