杂种优势是植物界的普遍规律。通过异花、异株、异种的杂交,促使植物内部矛盾激化,就能够推动植物向高一级发展。棉花利用杂种优势可以大幅度增产,而育苗移栽又为利用杂交打开了方便之门。棉花有性杂交不仅一、二代能增产,而且通过杂交产生变异创造新类型,为棉花选种创造物质基础。我们谋求:将棉花杂种优势利用和棉花育种工作结合起来,一年杂交,一年推广,连续选择,连年高产,促使棉花种子有计划地进行更新。棉花杂种优势利用是棉花育种的一个新 Heterosis is a common law in the plant kingdom. Through cross-species, heterotypic, heterogeneous hybridization, prompting the intensification of contradictions within plants, can promote the plant to a higher level of development. Cotton utilization heterosis can greatly increase production, and transplanting seedling again opened the door for the use of hybridization. Sexual hybridization of cotton not only yields one or two generations of cotton, but also creates new types through hybridization and creates a material basis for cotton selection. We seek to: Combine the utilization of cotton heterosis with cotton breeding. One year of hybridization, one year of promotion, continuous selection, and successive years of high yields have prompted the cotton seeds to be systematically updated. The utilization of cotton heterosis is a new cotton breeding