论文部分内容阅读
以4个化感稻品系与7个不育系所配的28个化感杂交稻组合为材料,以美国强化感稻PI312777为对照,研究了化感杂交稻田间抑制稗草的能力及其杂种优势表现。结果显示,化感杂交稻田间抑制稗草的主要因素是化感作用和竞争作用,其中化感作用对其整体抑草效应的影响较大;2012年早季的抑草效果优于2011年晚季,即环境条件影响了化感杂交稻抑草作用的发挥,其中竞争作用受环境影响较大;相关性分析表明,化感杂交稻的抑草作用对存活稗草地上部分生长量的影响主要是竞争作用的结果。从稗草株高及单株干物重来看,化感稻0210所配组合的抑草能力表现出很强的超父本和竞争优势,且田间表现稳定。基于封行前抑草率和灌浆期抑草率,有14个组合在早、晚季均表现出优于相应父本以及美国强化感稻PI312777的抑草效果,显示化感杂交稻在抗草育种中具有良好的利用前景。
In this study, 28 allelopathic hybrid rice combinations were selected from 4 allelopathic rice lines and 7 sterile lines, and the enhanced susceptible hybrid rice PI312777 was used as control. Advantage performance. The results showed that the allelopathic and competitive effects were the main factors inhibiting barnyardgrass in the field of allelopathic hybrid rice, and the allelopathic effect had a great effect on the overall weed suppression effect. The weed control effect in the early season in 2012 was better than that of the late 2011 Seasonal, that is, environmental conditions affected the weed control effect of hybrid hybrid rice, in which the competitive effect was greatly influenced by the environment. Correlation analysis showed that the effect of the weed control effect on the growth of barnyardgrass was mainly It is the result of competition. From the barnyard grass height and dry weight per plant point of view, allelopathic rice 0210 combinations with the weed control ability to show a strong super-paternal and competitive advantage, and the field performance was stable. Based on the rate of inhibition of grafting before seeding and the rate of grazing at grain filling stage, 14 combinations showed weed-controlling effect better than that of the corresponding parents and American enhanced susceptible rice (PI312777) in early and late seasons, and showed that allelopathic hybrid rice Has good prospects for the use.