非1B/1R和1B/1R类型K型小麦雄性不育系幼穗部分生理指标的变化

Changes of Some Physiological Characters in Panicles of No-1B/1R and 1B/1R in K-type Male Sterile Wheat Lines

为了揭示非1B/1R及1B/1R类型K型小麦雄性不育系雄性败育的生化机制,在不同发育时期对K型非1B/1R小麦雄性不育系KTSP3314A及同型保持系TPS3314B与K型1B/1R小麦雄性不育系K3314A及同型保持系3314B幼穗中游离氨基酸总量、可溶性蛋白含量、可溶性糖和淀粉含量进行了测定。结果表明,非1B/1R类型的K型不育系幼穗的这些生理指标与1B/1R类型K型小麦雄性不育系的变化不同。1B/1R类型不育系除可溶性糖含量在整个发育时期与其同型保持系差别不明显外,其它物质的含量在单核小孢子时期均差异明显;非1B/1R类型不育系这四种物质含量在二核小孢子时期均差异较大。由此说明,这两类K型不育系的雄性败育进程有所不同,非1B/1R类型K型不育系的雄性败育时间晚于1B/1R类型K型不育系,并在雄性败育的过程中伴随着部分生理指标的变化。

To reveal the physiological-biochemical mechanism of non-lB/1R K-type male sterile wheat lines, the contents of free amino acids, soluble protein and soluble sugar and starch in the panicles of non-lB/1R and 1B/1R male sterile wheat lines of KTSP3314A, K3314A and their maintainers TSP3314B, 3314B were investigated at different developmental stages, respectively. The results showed that there were differences in those indexes between non-lB/1R and 1B/1R male sterile wheat lines. Except for soluble sugar content, significant differences in other indexes were observed between 1B/1R male sterile wheat line K3314A and its maintainer 3314B in all the developing stages. Significant differences in all the four indexes were observed between non-lB/1R male sterile wheat line KTSP3314A and its maintainer TSP3314B in binucleate microspore stage. Therefore, those differences may lead to the difference in abortion progress of male sterility between 1B/1R and non-lB/R male sterile lines, which occurred earlier in 1B/1R than non-lB/1R male sterile wheat lines.