在美国东南部的Bt和非Bt玉米产量和种植日期之间的相互作用效应
Francis P F Reay-Jones1, G David Buntin2, Dominic D Reisig3
1Department of Plant and Environmental Sciences, Pee Dee Research and Education Center, Clemson University, Florence, SC, USA.
Journal of economic entomology
|January 12, 2025
概括
转基因玉米 (Bacillus thuringiensis,Bt) 杂交物比非Bt玉米显示出产量优势,特别是当在季节晚些时候种植时. 这些Bt玉米产量增加比以前认为的在美国东南部更频繁.
科学领域:
- 农业科学 农业科学
- 昆虫学 昆虫学是一门学科.
- 遗传学 是一个遗传学.
背景情况:
- 转基因玉米 (Zea mays L.) 表达Bacillus thuringiensis (Bt) 毒素有助于控制昆虫害虫的破坏.
- 从2009年到2023年,在佐治亚州,北卡罗来纳州和南卡罗来纳州进行了实地试验,以评估Bt玉米的产量效益.
研究的目的:
- 总结一下Bt玉米杂交的产量优势与美国东南部的非Bt杂交相比.
- 分析种植日期如何影响Bt玉米的产量优势.
主要方法:
- 在田间条件下对Bt和非Bt玉米杂交品种的评估.
- 与Bt特征 (Cry1A.105 + Cry2Ab2,Cry1Ab + Cry1F),种植日期,状态和昆虫损伤水平 (Helicoverpa zea,Spodoptera frugiperda) 相关的产量数据的统计分析.
主要成果:
- 平均而言,Bt玉米杂交品的产量明显高于其非Bt对应品.
- 与非Bt玉米相比,Bt玉米的百分比产量增加在较晚的种植日期更大.
- 在Bt和非Bt杂交品种中,产量下降,核和叶子受到关键昆虫害虫的伤害增加.
结论:
- 在美国东南部,Bt玉米提供了产量优势,在生长季节的晚些时候,收益可能会增加.
- 在该地区,Bt玉米的产量增加可能比以前记录的更为常见.
- 虽然Bt玉米提供了好处,但管理昆虫压力和其他影响产量的因素仍然至关重要.
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