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目前,杂交水稻制种用的父本,一般生育期较长,母本生育期较短,父母本生育期差异较大。要获得较高的杂种产量,确定适当的父母本播种差期,适时播插,使父母本花期相遇良好,是制种成败的基础。在毛主席革命路线指引下,我们通过两年来对水稻三系育种工作的实践,认为过去早造制种,依据父母本生育期差或叶龄数安排播插期,往往不很可靠,有时甚至花期不遇。而以父母本的有效积温差为主要依据,参考其它比较
At present, the male parent of hybrid rice seed production, the longer the general growth period, the shorter the parental growth period, parental differences in the growth period. To get a higher yield of hybrids, determine the appropriate parents of this sowing difference, timely sowing, so that the parents of flowering good meet, is the basis for the success of seed production. Guided by Chairman Mao’s revolutionary line, through the practice of three-line breeding of rice in the past two years, we think that in the past, the early seed-breeding system was based on the difference in parents’ reproductive period or leaf age, which was not always reliable and sometimes even Not flowering period. However, the effective temperature difference between parents is the main basis for reference to other comparisons