Transgenes for insect resistance reduce herbivory and enhance fecundity in advanced generations of crop-weed hybrids of rice.
Transgenes for insect resistance reduce herbivory and enhance fecundity in advanced generations of crop-weed hybrids of rice.
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DOI：
10.1111/j.1752-4571.2011.00190.x
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发表时间：
2011-09
影响因子：
4.1
通讯作者：
Lu BR
中科院分区：
文献类型：
--
作者：
Yang X;Xia H;Wang W;Wang F;Su J;Snow AA;Lu BR
来自转基因作物的基因流允许新的特性传播到性相容的杂草中。抗虫性等特性可能会增强杂草的适应性，但很少有研究在自然田间条件下测试这些效果。我们创建了F2和F3作物杂草杂交谱系的基因工程水稻（水稻）使用线与两个转基因构建体，豇豆胰蛋白酶抑制剂（CpTI）和Bt转基因连接到CpTI（Bt/CpTI）。在中国福州进行的实验表明，CpTI单独没有显着影响繁殖力，虽然它减少了植食性。与此相反，在某些条件下，Bt/CpTI赋予高达79%，减少昆虫的损害和47%的繁殖力，相对于非转基因对照，和44%的繁殖力增加相对于杂草父母。在低虫压和与转基因阴性对照的直接竞争下生长时，检测到Bt/CpTI的F3后代中存在小的适合度成本。我们得出结论，Bt/CpTI转基因可能渗入共发生杂草稻种群，并有助于更大的种子产量时，目标昆虫丰富。然而，与Bt/CpTI相关的净适应性益处可能是短暂的，如果昆虫压力缺乏，例如，由于Bt品种的广泛种植，抑制目标昆虫种群。
Gene flow from transgenic crops allows novel traits to spread to sexually compatible weeds. Traits such as resistance to insects may enhance the fitness of weeds, but few studies have tested for these effects under natural field conditions. We created F2 and F3 crop–weed hybrid lineages of genetically engineered rice (Oryza sativa) using lines with two transgene constructs, cowpea trypsin inhibitor (CpTI) and a Bt transgene linked to CpTI (Bt/CpTI). Experiments conducted in Fuzhou, China, demonstrated that CpTI alone did not significantly affect fecundity, although it reduced herbivory. In contrast, under certain conditions, Bt/CpTI conferred up to 79% less insect damage and 47% greater fecundity relative to nontransgenic controls, and a 44% increase in fecundity relative to the weedy parent. A small fitness cost was detected in F3 progeny with Bt/CpTI when grown under low insect pressure and direct competition with transgene-negative controls. We conclude that Bt/CpTI transgenes may introgress into co-occurring weedy rice populations and contribute to greater seed production when target insects are abundant. However, the net fitness benefits that are associated with Bt/CpTI could be ephemeral if insect pressure is lacking, for example, because of widespread planting of Bt cultivars that suppress target insect populations.
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影响因子：
3.1
作者：
Messeguer, J;Marfà, V;Melé, E
通讯作者：
Melé, E
DOI：
10.1051/ebr:2003001
发表时间：
2003-01-01
期刊：
Environmental Biosafety Research
影响因子：
--
作者：
Jenczewski, Eric;Ronfort, Joelle;Chevre, Anne-Marie
通讯作者：
Chevre, Anne-Marie
DOI：
10.1051/ebr:2008011
发表时间：
2008-04-01
期刊：
Environmental Biosafety Research
影响因子：
--
作者：
Cohen, Michael B.;Arpaia, Salvatore;Snow, Allison A.
通讯作者：
Snow, Allison A.
影响因子：
1.7
作者：
Hou, Maolin;Lin, Wei;Han, Yongqiang
通讯作者：
Han, Yongqiang
影响因子：
4.1
作者：
Carrière Y;Crowder DW;Tabashnik BE
通讯作者：
Tabashnik BE