1 使用高纯度的亲本亲本纯度是决定种子质量的先决条件,要想提高种子质量,首先要从提高亲本纯度抓起。建立健全提纯复壮基地和原种生产圃,是提高种子质量和纯度、防止品种退化、保持种性的有效手段。坚持第一年套袋、第二年穗行、第三年扩繁、第四年制种的“四年一贯制”的繁育程序。认真把好亲本质量关,为 1 The use of high-purity parents Parents purity is the prerequisite for determining the quality of the seeds, in order to improve the quality of the seeds, we must first improve the purity from the parent. Establish and improve the base of rejuvenation and the original production of nurseries, is to improve the quality and purity of seeds, to prevent the degradation of species, maintain an effective means of species. Adhere to the first year of bagging the ear of the ear in the second year, the third year of expansion, the fourth year of planting “four years consistent ” breeding program. Seriously the good quality of the parent, for