论文部分内容阅读
在推广玉米杂交种过程中,当新选育的优良杂交种急需在大面积迅速推广,或已推广的杂交种由于自交系不纯而急需进行自交系更新时,都存在着自交系原种数量少、繁殖速度慢和生产上需种量大、时间急的矛盾。经过几年的实践,我区摸索出了采用育苗移栽的方法,把自交系原种的繁殖系数,由直播的30—40倍,提高到120倍以上,较好地解决了这一矛盾。
In the process of popularizing maize hybrids, inbred lines exist when the excellent new hybrids are urgently needed to be popularized in a large area or the popularized hybrids are in urgent need of renewal of inbred lines due to the impure inbred lines Small number of original species, slow reproduction and the need for large-scale production, time-consuming contradictions. After several years of practice, our district worked out the method of seedling transplanting, the breeding coefficient of the original inbred lines, from 30 to 40 times the live broadcast, to 120 times more, a better solution to this contradiction .