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用于配制杂交水稻的不育系的纯度,是影响杂交水稻能否充分发挥优势的因素之一。三年来,我们通过对二九矮不育系和珍汕97不育系(分别为配制矮优、汕优号杂交水稻的不育系)的观察和显微镜检查花粉粒,对这两个不育系的混杂植株,可按以下情况进行鉴别。二九矮不育系:它在苗期、分蘖期和拔节孕穗期,叶鞘青绿,叶耳、叶舌呈灰白色。如有叶鞘紫红,叶脉、叶缘紫红的植株,为混杂植株,应予除去。在穗期虽然叶鞘青绿,叶耳、叶舌呈灰白色,但穗颈节与叶色平齐或穗颈节完全抽离叶苞的植株,则是矮优2号,也应除去。
The purity of the CMS lines used to formulate hybrid rice is one of the factors influencing the hybrid rice’s ability to give full play to its advantages. In the past three years, we examined the pollen grains by microscopy and microscopic observation on the male sterility lines of D19 and D197 sterile lines (CMS lines of Dwarf and Shanyou, respectively) Department of mixed plants, according to the following circumstances to identify. Two nine short sterile lines: It is in the seedling stage, tillering and jointing booting stage, green leaf sheath, auricles, leaf tongue grayish white. If the leaves sheath purple, veins, leaf edge purple plants, mixed plants, should be removed. Although the leaves in the spike green, leaf ears, leaf tongue is gray, but the panicles neck section and leaf color flush or neck full of leaves from the leaves of the plant, it is short, 2 should also be removed.