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首页> 外文期刊>Journal of Invertebrate Pathology >Performance of Bt-susceptible and -heterozygous genotypes of Spodoptera frugiperda (JE Smith) possessing single- or dual-gene resistance alleles in sequential feedings of non-Bt and Cry1A.105/Cry2Ab2 maize leaf tissues
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Performance of Bt-susceptible and -heterozygous genotypes of Spodoptera frugiperda (JE Smith) possessing single- or dual-gene resistance alleles in sequential feedings of non-Bt and Cry1A.105/Cry2Ab2 maize leaf tissues

机译：具有单次或双基因抗性等位基因的非BT和Cry1a.105 / Cry2ab2玉米叶组织中具有单次或双基因抗性等位基因的Spodoptera Frugiperda（JE Smith）的性能和 - 静脉曲化的植物酶基因型.105 / Cry2ab2玉米叶组织

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摘要

We simulated larval feeding behavior in seed blends of non-Bt and Bt maize to determine if seed blends create more favorable conditions for heterozygous-resistant insects over their Bt-susceptible counterparts. Survival, growth, development, and progeny production of four genotypes of the fall armyworm, Spodoptera frugiperda, Bt-susceptible (aabb), Cry1A.105 heterozygous resistant (Aabb), Cry2Ab2 heterozygous resistant (aaBb), and Cry1A.105/Cry2Ab2 heterozygous resistant (AaBb), were evaluated in eight feeding sequences (Seq 1-8) of non-Bt and MON 89034 Bt maize leaf tissue expressing the Cry1A.105 and Cry2Ab2 proteins. We report variation in the performance of the four genotypes across the feeding sequences and biological parameters measured. Three heterozygous genotypes generally outperformed the susceptible genotype in larval survival, pupation rate, pupal weight, and progeny production. The performance was greater for Aabb over aaBb, AaBb over Aabb or aaBb, in two of the feeding sequences. The findings of this study could have important implications in assessing the risk of seed blends as refuge plantings for Bt crop resistance management where resistance in the target pest is not functionally recessive.
机译：我们模拟了非Bt和Bt玉米的种子混合物中的幼虫饲养行为，以确定种子混合物是否在其BT易感对应上对杂合昆虫产生更有利的条件。生存，生长，发育和后代生产秋季苗条的四种基因型，Spodoptera Frugiperda，BT-易感（AABB），Cry1a.105杂合（AABB），Cry2ab2杂合（AABB），Cry1a.105 / Cry2ab2杂合在表达Cry1a.105和Cry2ab2蛋白的非BT和Mon 89034 Bt玉米叶组织的八个饲料序列（SEQ 1-8）中评价耐药序列（AABB）。我们报告了在饲料序列的四种基因型的性能的变化和测量的生物参数。三种杂合基因型通常优于幼虫存活，蛹率，蛹重量和后代生产中易感基因型。在两种喂养序列中，AABB，AABB或AABB中的AABB，AABB OVER ob，AABB的性能更大。本研究的结果可能对评估种子混合物的风险具有重要意义，作为BT裁剪抗性管理的避难种植，其中靶虫害的抵抗在功能上没有功能性隐性。

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