热胁迫下对玉米自交系育性的鉴定

在山西运城市7-8月份气温偏高的特殊气候环境下,对120份玉米自交系材料进行了雄花育性鉴定。结果表明,高温条件下,材料间的雄花育性存在着明显的差异;不育性表现方式有:无花粉粒、花药吐不出、花药不散粉。模拟玉米螟为害雄花节打孔试验表明,即使玉米植株能得到充足的水分供应,雄花内部的水分胁迫是影响花粉正常散出的主要因素之一。

Identification of the Fertility for Inbred Maize in the Stress of High Temperature

The tassels fertility of 120 inbred maize materials were identified and analyzed in the condition of high temperature from July to August, in Yuncheng . The result showed that in the condition of high temperature, there existed obvious difference among the tassels' fertility of these maize materials. Their sterility showed there were no pollen grains, anther could not be shedded, and anther couldn't shed pollen. The result of simulating European corn borer's damage (digging a hole in the nodes of tassels) indicated even if the maize plants could get enough water supply, water stress inside the tassels was one of the main factors affected the pollen grains to shed normally.