Assessing the efficacy and generational stability of commercial transgenic maize resistance against key stored-product insect pests

IF 4.1 1区 农林科学 Q1 ENTOMOLOGY
J. Parsons, J. Riudavets, M. S. Lopes
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Abstract

Genetic resistance, particularly through transgenic Bt maize, has demonstrated high efficacy in pest control under field conditions. However, in storage conditions, maize is susceptible to different pest species, which compromises its quality. It is unknown how effectively the Bt maize functions in storage environments or if resistance is being inherited in later generations. This study investigates two commercial maize genotypes: a transgenic genotype expressing the Cry1Ab protein and its near-isoline counterpart. It utilizes commercial seeds of both genotypes (F1), along with seeds obtained from field-grown transgenic and near-isoline plants (F2), which represent the seeds stored by farmers and the agricultural industry. The aim is to assess their vulnerability to common insect pests that affect stored products. By assessing grain damage and insect population dynamics, we identify differences in resistance among these different maize genotypes and generations. Our findings show that transgenic maize exhibits strong resistance against Sitotroga cerealella but lower resistance against Sitophilus zeamais. The impact of Oryzaephilus surinamensis on both genotypes was negligible. Additionally, the resistance diminishes in the F2 generation. With S. cerealella the F2 transgenic experienced 55% more damage compared to the F1. Similarly, in the case of S. zeamais, the F2 maize produced five times more frass than the F1, highlighting a significant reduction in resistance. This research identifies the resistance characteristics of maize, highlighting the most suitable traits for assessing pest resistance in stored maize. It emphasizes the need for sustainable pest control with genetic resistance, ensuring long-term protection of stored grains, and minimizing post-harvest losses.

商品转基因玉米抗主要储粮害虫的有效性和世代稳定性评价
遗传抗性,特别是通过转基因Bt玉米,在田间条件下已显示出很高的害虫防治效果。然而,在储存条件下,玉米容易受到不同害虫的影响,从而影响其质量。目前尚不清楚Bt玉米在储存环境中的作用如何有效,或者抗性是否遗传给后代。本研究研究了两种商业玉米基因型:一种是表达Cry1Ab蛋白的转基因基因型,另一种是表达Cry1Ab蛋白的近等距基因型。它利用两种基因型的商业种子(F1),以及从田间种植的转基因和近等距植物(F2)获得的种子,这些种子代表农民和农业工业储存的种子。目的是评估它们对影响储存产品的常见害虫的脆弱性。通过评估谷物损害和昆虫种群动态,我们确定了不同玉米基因型和世代之间的抗性差异。结果表明,转基因玉米对稻谷象虫具有较强的抗性,但对玉米象虫的抗性较低。苏里南稻瘟菌对两种基因型的影响均可忽略不计。此外,在F2代中,电阻减小。与F1相比,F2转基因玉米受到的伤害多55%。同样,在玉米玉米的情况下,F2玉米比F1玉米产生的杂草多5倍,突出了抗性的显著降低。本研究鉴定了玉米的抗虫特性,突出了贮藏玉米抗虫性评价的最适宜性状。它强调需要通过遗传抗性进行可持续的虫害防治,确保长期保护储存的谷物,并尽量减少收获后损失。
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来源期刊
Journal of Pest Science
Journal of Pest Science 生物-昆虫学
CiteScore
10.40
自引率
8.30%
发文量
114
审稿时长
6-12 weeks
期刊介绍: Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues. Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates. Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management. Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.
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