问题:自花授粉植物的天然混杂群体中,可分离出许多()纯合的()。
Thursday, November 2, 2023
问题:一般水稻可到海南岛()来加速种子生产进程。A、春繁B、夏繁C、秋繁D、冬繁
Thursday, September 15, 2022
问题:一般把父本先播种,母本后播种,称顺播差,反之,称倒播差。
Friday, February 23, 2024
Saturday, September 9, 2023
Sunday, August 20, 2023
问题:水稻光温敏核不育系与三系不育系的主要区别()。A、包颈B、在一定条件下能自交结实繁殖自身C、分蘖力强D、开花分散
Friday, March 22, 2024
Sunday, May 7, 2023
Monday, November 20, 2023
Thursday, October 5, 2023
Thursday, September 15, 2022
问题:制种田父母本行向一般要与开花期的风向垂直或成一定角度。
Thursday, September 15, 2022
Friday, December 23, 2022
Sunday, May 7, 2023
问题:由天“三系”杂交稻不育系与保持系是同型系,因此,父母本之间一般不需进行错期播种。
Tuesday, April 30, 2024
Thursday, April 11, 2024
Thursday, September 15, 2022
Sunday, May 7, 2023
Sunday, October 9, 2022
Thursday, September 15, 2022
Sunday, October 1, 2023