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1充分了解亲本的特征特性只有充分了解掌握亲本的特征特性,在组合、品系的安排管理上才能有针对性。尤其是某些品系在极端气候条件的特殊变化,如雌雄协调性、对高、低温的敏感性、抗性、适应性等。2选择适宜的繁制种生态区2.1热量资源制种区的热量资源条件较亲本自交系所需热量条件
1 fully understand the characteristics of the parental characteristics Only fully understand the characteristics of the parental characteristics in the portfolio, the management of the arrangement of lines can be targeted. In particular, some strains in the extreme climatic conditions, special changes, such as male and female coordination, high and low temperature sensitivity, resistance, adaptability and so on. 2 Select the appropriate species of reproductive ecology 2.1 calorific resources of the heat resources of seedling areas than the parental inbred lines required heat conditions