论文部分内容阅读
多年来,不育系繁殖生产父母本播种期是以时间而定。习惯的作法是,母本播种后5—7天播第一期父本,过5天后再播二期父本。这样做的结果,时常不是父本抽穗偏早,就是母本抽穗偏早,导致不育系繁殖产量不高、不稳。原因是,在不育系繁殖期间一般都是早春播种,由于早春气温极不稳定,寒潮频繁,往往母本播下后,因气温下降,十天半月不见苗,如若按母本播下后5—7天就播父本,结果是父本偏早很多,待母本大量抽穗时,父本却散粉完毕。另外秧苗期
Over the years, the sowing date of CMS breeding parents is based on time. It is customary practice is to broadcast the first paternal day 5-7 days after sowing the mother, sow two paternity after 5 days. The result of this is often that the male parent is heading too early or the female parent is heading earlier, resulting in a lower yield and instability of the male sterile line. The reason is that in the breeding period of sterile lines are usually sown in early spring, due to early spring air temperature is very unstable, frequent cold, sowing mother often, due to temperature drops, ten days and a half months without seedlings, if the mother sowed after 5 -7 days to broadcast paternal, the result is a lot of paternal earlier, to be a large number of female parent heading, the father has loose powder is completed. Another seedling stage