Efficacy of insect-resistance Bt/CpTI transgenes in F5–F7 generations of rice crop–weed hybrid progeny: implications for assessing ecological impact of transgene flow
Efficacy of insect-resistance Bt/CpTI transgenes in F5–F7 generations of rice crop–weed hybrid progeny: implications for assessing ecological impact of transgene flow
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抗虫 Bt/CpTI 转基因在水稻作物与杂草杂交后代 F5-F7 代中的功效：评估转基因流生态影响的意义
DOI：
10.1007/s11434-015-0885-x
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发表时间：
2015-09
期刊：
影响因子：
18.9
通讯作者：
Bao-Rong Lu
中科院分区：
文献类型：
--
作者：
XingXing Cai;Feng Wang;Jun Su;Bao-Rong Lu
AbstractEcological impact of transgene flow into populations of wild/weedy relatives is associated with fitness effects in hybrid progeny. Most studies assessing fitness effects focus essentially on early-generation hybrid progeny. However, whether the transgenes remain effective and durable in advanced generations of hybrid progeny remains unclear. We conducted a common garden experiment with F5–F7 hybrid progeny derived from crosses between insect-resistant transgenic (Bt/CpTI) rice and weedy rice, to examine their insect resistance and fitness effects of transgenes on progeny. Hybrid progeny were grown under different insect pressures and cultivation modes where insect damage and fitness-related traits were measured in the same growth season. Plants with transgenes showed significantly lower insect damage (10 % vs. 32 %) and higher fecundity (551 vs. 392 seeds/plant) than those without transgenes in F5–F7 populations, suggesting the efficacy of transgenes for insect resistance. Fitness benefits of the transgenes were similar among the F5–F7 populations, indicating the stability of transgenic effects. Our results have important implications for assessing ecological impacts caused by transgene flow to wild/weedy relatives. For cost-effectiveness, the experimental estimation of fitness effects is probably sufficient based on data from hybrids in early generations. Given that fitness effects of insect-resistance transgenes are associated with ambient insect pressure, ecological risk assessment on transgene flow should consider this variable in experimental design, reasonably reflecting actual situations in wild/weedy populations.Abstract本文报道了抗虫转基因 (Bt/CpTI) 对水稻与杂草稻杂种 F5–F7 分离世
代的抗虫性及适合度效应分析。在有害虫发生的环境中, 含转基因的 F5–F7 分离
群体比对应的非转基因群体虫害显著较低, 而结实性显著较高, 表明抗虫转基因
在高世代的杂种群体中仍非常有效, 且世代之间的适合度效应也比较稳定。因此,
抗虫转基因漂移生态风险的评价仅在早世代杂种群体中进行便可达到目的。转基
因的适合度效应与环境的虫压之间显著正相关, 表明正确的环境虫压设置对抗虫
转基因适合度效应的评价非常重要。
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影响因子：
2.4
作者：
P. Ekins
通讯作者：
P. Ekins
影响因子：
1.9
作者：
F. Blattner
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F. Blattner
影响因子：
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作者：
Vicki D Crinis
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Vicki D Crinis
影响因子：
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作者：
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通讯作者：
R. Eglash
DOI：
10.1080/13573320701467344
发表时间：
2004-01
期刊：
Wiley-Blackwell: Development Policy Review
影响因子：
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作者：
J. Roberts;D. Shaw;P. Sahoo;N. Harris;B. Persaud;M. Thakur;I. Gillson;A. Suleiman
通讯作者：
J. Roberts;D. Shaw;P. Sahoo;N. Harris;B. Persaud;M. Thakur;I. Gillson;A. Suleiman