W6154S和W6184S生育特性的初步研究

A PRELIMINARY STUDY ON THE GROWTH-DEVELOPMENT CHARACTERISTICS OF W6154S AND W6184S

分析籼稻两用核不育系 W6154S 和 W6184S 的生育特性.在3月30日～6月10日期间,播期的迟早与播始天数呈线性关系,6月10日以后播种,播始天数基本稳定;这两个不育系在播始期间的活动积温与播始天数亦呈线性关系.建立了反映上述两种线性变化的回归方程,讨论了这些回归方程在确定亲本播种期时的利用.

The growth-development characteristics of indica rice two-way genie male sterile(MS) line W6154S and W6184S was analysised.When the MS line was sowed in the periodof Mar.30th-June 10th,the linear relation between sowing date and the days to headingwas found;When sowed after June 10th,the days to heading was relatively stable.The rela-tionship between the days to heading and the actively cumulative temperature forsowing-heading duration was linear.The equations were formed to deseribe the linear rela-tions above and the use of these equations for indetermining the sowing date of the MSlines in seed production was discussed.