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在杂交水稻制种工作中,虽然不育系和恢复系有了比较准确的播种错期,但往往由于气候变化、秧苗素质、秧龄长短、插秧深浅、肥水管理等因素的影响,还有可能造成花期不遇或相遇不好。在这种情况下,除采取一些调节花期的措施外,借父传粉,对夺取制种高产稳产,有显著的效果。所谓借父传粉,就是在制种田四周隔离区和制种田中间,按制种田面积的3—5%,划出一些田块,专种同一父本品种,其播、插期一部分比制种田中的第一期父本提早7天左右,另一部分比制种田中最后一期父本延迟7天左右,6×6(寸)或7×5(寸)单株插植并加强管理,作为后备父本。当制种田出现花期不遇或花期相遇不好时,就选择后备父本中花期与制
In hybrid rice seed production, although the male sterile lines and restorer lines have a relatively accurate sowing date, they are still likely to be affected by such factors as climate change, seedling quality, seedling age, transplanting depth, fertilizer and water management and other factors Florescence or encounter is not good. In this case, apart from taking some measures to regulate the flowering period, borrowing the hand of the father has a significant effect on seizing high and stable seed production. The so-called father-to-child powder, that is, the system of farming around the isolation zone and the middle of farming, according to the system of 3-5% of the area of farming, draw some plots, the same species of the same parent, the sowing, Of the first phase of the father of about 7 days earlier, the other part of the system than farming the last phase of the father delayed about 7 days, 6 × 6 (inch) or 7 × 5 (inch) single plant and strengthen management, as a backup Father. When the system of flowering occurs when the flowering period or flowering is not good, we choose the reserve father of flowering and system