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籽粒败育是玉米生产上的一个重要问题。据我们观察,一般杂交种的结实率为50-70%,籽粒败育占总败育率的20-40%。因此,了解籽粒败育的原因,对改进栽培措施,减少败育粒数,增加产量有重要意义。但国内外对玉米籽粒败育的研究还不够深入,正如W.G.Duncan所指出的那样,受精之后籽粒停止发育的时期、原因及发育潜力能维持多久,还没有实验资料来回答。籽粒败育主要发生于果穗顶部。因此,我们于1982-1984年研究比较了正常粒与顶部败育粒的形态、生理特征,试图弄清玉米籽粒败育的时间和生理原因。
Grain abortion is an important issue in corn production. According to our observation, the seed setting rate of common hybrids is 50-70%, and the abortion rate is 20-40% of the total abortion rate. Therefore, to understand the reasons for the abortion of rice is of great significance to improve the cultivation measures, reduce the number of aborted grains and increase the yield. However, at home and abroad, the research on maize kernel abortion is still not deep enough. As W.G.Duncan points out, the period, the reason and the development potential of the grain after fertilization stop its development can not be answered for a long time. Grain abortion occurs mainly on the top of the ear. Therefore, we compared the morphological and physiological characteristics of normal and top aborted grains in 1982-1984 and tried to find out the time and physiological reasons for the abortion of maize grains.