认识改良单交改进制种技术四川省开县种子公司彭先达，刘昌波当前，在玉米生产上使用的绝大多数是单交种。其种子是在近交衰退、自身生产力较低的自交系植株上生产的，一般制种产量较低。大力提高制种产量是玉米生产发展的需要，也是落实、巩固制种基地和提高种子公司经济... Recognition of Improved Single Cross to Improve Seed Production Techniques Kaixian Seed Company in Sichuan Province Peng Xianda and Liu Changbo Currently, the vast majority of corn used in production are monoculture. Its seeds are produced on inbred lines that have declined in inbreeding and their own productivity, with lower seed production rates. Vigorously improve seed production is the development of corn production needs, but also to implement, consolidate seed production base and improve seed economy ...