天气预报15天查询> 其他> 袁隆平的三系只得是哪三系

袁隆平的三系只得是哪三系

更新时间: 2020-07-05 00:00:00     

1、不育系:将选择的雄性不育单株与可育的个体杂交,再经连续回交培育而成的具有雄性不育特征且整齐一致的品系。不育系即不能繁育的材料,一般指雌蕊或雄蕊败育,自身不能繁殖后代;

2、保持系:当作为父本的植株与不育系杂交时,能使F1保持雄性不育性的植物品系;

3、恢复系:是指某一品系与不育系杂交后可使子代恢复雄性可的特征的植物品系。

关键词: 只得

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-186836/ | 耗时:0.8022 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=186836 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=186836 LIMIT 0,1
select * from tbl_Articles_sphinx where id=186836 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1104847,1060241,1065917,1131551,1059515,1063559,1057607,1126892,1064085,1051535,1114456,2662119,1113387,1788020,1046402,1061598,1052599,2451048,1066810,1062248,1065729,1057545,1278515,1107251,1130184,1048474,1049548,1131967,1303681,1062346) ORDER BY field (ArticleID,1104847,1060241,1065917,1131551,1059515,1063559,1057607,1126892,1064085,1051535,1114456,2662119,1113387,1788020,1046402,1061598,1052599,2451048,1066810,1062248,1065729,1057545,1278515,1107251,1130184,1048474,1049548,1131967,1303681,1062346)