Fitness and maternal effects in hybrids formed between transgenic oilseed rape (Brassica napus L.) and wild brown mustard [B-juncea (L.) Czern et Coss.] in the field
Fitness and maternal effects in hybrids formed between transgenic oilseed rape (Brassica napus L.) and wild brown mustard [B-juncea (L.) Czern et Coss.] in the field
复制标题
转基因油菜 (Brassica napus L.) 和野生褐芥菜 [B-juncea (L.) Czern et Coss.] 在田间形成的杂交体的适应性和母性效应
DOI：
10.1002/ps.1749
复制
发表时间：
2009-07-01
影响因子：
4.1
通讯作者：
Ma, Ke-Ping
中科院分区：
文献类型：
--
作者：
Di, Kun;Stewart, C. Neal, Jr.;Ma, Ke-Ping
背景技术背景：作物和杂草近缘种之间的基因流动依赖于田间环境中早期杂交后代的存活和繁殖。本研究的主要目的是比较转基因作物×野生杂交种与其亲本类型和非转基因作物类型在田间增加温度和湿度下的适合度。野芥末[B.芥菜（L.）Czern et Coss.]，它们的杂交种和非转基因B。以这样的方式种植油菜，以模拟收获后的田间条件，在该条件下，自生植物可能出现在农业环境中。因子分析表明，营养生长特性解释了大部分植物类型之间的差异。野生棕色芥末在其整个生活史中具有最高的适应性。杂种的综合适合度居中，生殖适合度最低。杂种和野生杂草在其各自的后代中具有相似的营养生长特征和种子休眠性。结论：这些数据表明，在温暖的气候条件下，转基因的持久性可能增强。转基因的适应度成本的缺失可能会使转基因在生态系统中持续存在。这些数据将有助于在全球气候变化的背景下对转基因持久性和杂草管理进行风险评估。(C)2009年化学工业协会
BACKGROUND: Gene flow between crops and weedy relatives depends on the survivorship and reproduction of early-generation hybrids in a field environment. The primary aim of this study was to compare the fitness of transgenic crop x wild hybrids with their parental types and a non-transgenic crop type in the field under enhanced temperature and humidity.RESULTS: Transgenic insect-resistant oilseed rape (Brassica napus L.), wild brown mustard [B. juncea (L.) Czern et Coss.], their hybrids and non-transgenic B. napus were grown in such a way as to mimic field conditions after harvest under which volunteer plants might appear in agricultural settings. Factor analysis revealed that vegetative growth characteristics explained most of the observed differences among plant types. Wild brown mustard had the highest fitness during its entire life history. Hybrids had intermediate composite fitness and lowest reproductive fitness. The hybrid and the wild weed shared similar vegetative growth characteristics and seed dormancy in their respective progenies.CONCLUSION: These data indicate that there might be enhanced persistence of the transgene in warmer climates. The absence of fitness cost of the transgenes might allow transgenes to persist in ecosystems. These data will contribute to risk assessments of transgene persistence and weed management against the backdrop of global climate change. (C) 2009 Society of Chemical Industry