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为了选育新类型玉米雄性核不育系 ,提出了为玉米核不育性添加温光敏感性的设想和选择与鉴定相结合的策略 ,同时应用分期播种的方法为作物提供不同的生长和发育的环境条件 ,以鉴定玉米雄穗的育性变化和对不同环境条件温光的反应 .研究结果表明 ,春播环境下可鉴定和选择玉米的不育性 ,夏播环境下可鉴定和选择其温光敏感性 .针对玉米核不育性难以找到保持系的特性 ,结合两种播期选择两种性状 .但春播环境下选择的不育性群体难以通过选择单株来保持其不育性 ,为记录性群体选择 .通过从春播入选的杂合不育性优良株系群体转移到其对应的夏播温光敏感性入选的同一优良群体中进行优良单株选择 ,能逐渐使不育性和温光敏感性相结合而选育出纯合温光敏不育系 .这种新的选择程序主要包括应用分期播种法、记录性选择法和春夏两季交叉式选择法 ,使含有不育基因的可育株系逐步累积不育基因并增加了温光敏感性而育成玉米温光敏不育系
In order to select a new type of maize male sterile lines for maize, a strategy of combining temperature-sensitivity with temperature-light sensitivity for maize nuclear sterility and a strategy of combining selection and identification were proposed. In addition, staged sowing methods were used to provide different growth and development of crops In order to identify the changes of fertility and the response to temperature and light in different environmental conditions.The results show that the maize infertility can be identified and selected in spring and can be identified and selected under the conditions of summer sowing Photosensitiveness.For the maize nuclear infertility, it is difficult to find the maintainer line characteristics, and the two sowing dates were selected to combine the two traits.But the infertile groups selected in the spring sowing environment are difficult to maintain their sterility by selecting the single plant Recorded population selection.Exploration of excellent single plants by transferring from spring hybrid to elite line of hybrids into the same elite population selected for their corresponding summer sowing light photosensitivity can gradually increase the infertility and temperature Light sensitivity combined with breeding of a pure temperature and light-sensitive CMS lines.This new selection program includes the application of sowing seeding method, record selection method and cross-selection method of spring and summer, The fertile plants containing sterile genes were gradually accumulated in sterile genes and increased in temperature and photoperiod sensitivity to develop the thermo-photo-sensitive CMS line