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Selection for larger body size in Orius laevigatus: intraspecific variability and effects on reproductive parameters
Biological Control ( IF 3.7 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.biocontrol.2020.104310
José Enrique Mendoza , Virginia Balanza , Dina Cifuentes , Pablo Bielza

Abstract Different characters of natural enemies can affect their performance in biological control programs. Among them, body size may play a significant role, as has been associated with increased fitness. No specific studies on body size have been carried out in any Orius species, important predators widely used in biological control. Therefore, the aim of this work was to study the variation in body size in wild and commercial populations of O. laevigatus, and artificially select a strain with larger body size. The parameters of the life table of populations showing different body sizes was investigated. We found a significant variability in body size among wild populations of O. laevigatus, with commercial populations within the natural range. From this variation we started a selective breeding programme for larger body size, successfully obtaining a strain with a significant larger body size. Our selected strain showed higher fecundity when provided a nutritionally superior food (Ephestia kuehniella eggs), and increased fecundity and longevity when fed a nutritionally inferior food (honey bee pollen). Despite a slightly slower development time, the overall reproductive potential was similar or superior to that of the commercial and unselected populations. We hypothesize that the enhanced characteristics of the selected large strain are based on a superior ability to exploit nutritional resources, conferring stronger resilience under stresses (low food quality or quantity) typically found in agricultural ecosystems, improving its performance as biological control agent.

中文翻译:

Orius laevigatus 较大体型的选择:种内变异和对繁殖参数的影响

摘要 天敌的不同特征会影响其在生物防治程序中的表现。其中,体型可能起着重要作用,因为它与增加的健康有关。尚未对任何 Orius 物种(广泛用于生物控制的重要捕食者)的体型进行具体研究。因此,这项工作的目的是研究 O. laevigatus 野生和商业种群体型的变化,并人工选择体型较大的菌株。研究了显示不同体型的种群的生命表参数。我们发现 O. laevigatus 野生种群的体型存在显着差异,商业种群在自然范围内。从这个变异我们开始了一个更大体型的选择性育种计划,成功获得体型明显更大的菌株。我们选择的菌株在提供营养优越的食物(Ephestia kuehniella 鸡蛋)时表现出更高的繁殖力,而在喂养营养差的食物(蜂蜜蜂花粉)时,繁殖力和寿命增加。尽管发育时间稍慢,但总体繁殖潜力与商业和未选择的种群相似或优越。我们假设所选大型菌株的增强特性基于利用营养资源的卓越能力,在农业生态系统中常见的压力(低食品质量或数量)下赋予更强的弹性,提高其作为生物控制剂的性能。我们选择的菌株在提供营养优越的食物(Ephestia kuehniella 鸡蛋)时表现出更高的繁殖力,而在喂养营养差的食物(蜂蜜蜂花粉)时,繁殖力和寿命增加。尽管发育时间稍慢,但总体繁殖潜力与商业和未选择的种群相似或优越。我们假设所选大型菌株的增强特性基于利用营养资源的卓越能力,在农业生态系统中常见的压力(低食品质量或数量)下赋予更强的弹性,提高其作为生物控制剂的性能。我们选择的菌株在提供营养优越的食物(Ephestia kuehniella 鸡蛋)时表现出更高的繁殖力,而在喂养营养差的食物(蜂蜜蜂花粉)时,繁殖力和寿命增加。尽管发育时间稍慢,但总体繁殖潜力与商业和未选择的种群相似或优越。我们假设所选大型菌株的增强特性基于利用营养资源的卓越能力,在农业生态系统中常见的压力(低食品质量或数量)下赋予更强的弹性,提高其作为生物控制剂的性能。尽管发育时间稍慢,但总体繁殖潜力与商业和未选择的种群相似或优越。我们假设所选大型菌株的增强特性基于利用营养资源的卓越能力,在农业生态系统中常见的压力(低食品质量或数量)下赋予更强的弹性,提高其作为生物控制剂的性能。尽管发育时间稍慢,但总体繁殖潜力与商业和未选择的种群相似或优越。我们假设所选大型菌株的增强特性基于利用营养资源的卓越能力,在农业生态系统中常见的压力(低食品质量或数量)下赋予更强的弹性,提高其作为生物控制剂的性能。
更新日期:2020-09-01
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