利用太谷核不育小麦进行轮回选择,其不育穗异交结实率的高低将直接影响到轮选组群时亲本的投放,群体的规模,种植的方法等等。以往的研究表明:不育穗异交结实率的高低,主要受不育株花期的早晚,植株的高矮,分蘖的多少,以及传粉时气象条件好坏等因素的影响。至于不育穗开花时开颖角度的大小对异交结实率有何影响?回交父本和不育穗开颖大小的关系又如何?尚未见报道。搞清这些问题,对更好地进行基础材料的转育和提高异交结实率无疑是大有好处的,为此,特 The use of Taigu nuclear sterile wheat for reincarnation, the sterile seed outcrossing seed setting rate will directly affect the rotation of the selected group of the parental delivery, the size of the group, planting methods and so on. Previous studies have shown that the rate of outcrossing and seed setting of sterile spike is mainly affected by such factors as the morning and evening flowering period of the sterile plants, the height of the plants, the number of tillers, and the meteorological conditions during pollination. As for the sterile spike flowering angle on the size of the outcrossing rate of impact? Backcross parent and sterile spike open size how? Have not been reported. Clearly, these issues are undoubtedly of great benefit to better carrying out the transfer of basic materials and improving the rate of outcrossing. To this end,