Martinelli S, Clark P L, Zucchi M I, Silva-Filho M C, Foster J E, Omoto C
Departamento de Entomologia, Fitopatologia e Zoologia Agrícola, Universidade de São Paulo/ESALQ, Av. Pádua Dias 11, 13418-900, Piracicaba, SP, Brazil.
Bull Entomol Res. 2007 Jun;97(3):225-31. doi: 10.1017/S0007485307004944.
The purpose of this research was to evaluate the genetic similarity and structure of the fall armyworm, Spodoptera frugiperda (J.E. Smith), populations associated with maize and cotton crops in Brazil using amplified fragment length polymorphisms. Mean genetic similarity among populations was 0.45. The unweighted pair group method with arithmetic mean analysis dendrograms did not separate populations of S. frugiperda into clusters related to the host plant in which the insects were collected. No genetic variation was observed among maize and cotton populations of S. frugiperda, suggesting that the same populations are injuring both crops in Brazil. This research validates the need for stewardship of crop-protection methods for managing S. frugiperda to reduce the incidence of pesticide resistance, due to the spatial and temporal overlapping of maize and cotton crops in some regions in Brazil.
本研究的目的是利用扩增片段长度多态性评估巴西与玉米和棉花作物相关的草地贪夜蛾Spodoptera frugiperda（J.E. Smith）种群的遗传相似性和结构。种群间的平均遗传相似性为0.45。算术平均法的非加权配对组分析树状图并未将草地贪夜蛾种群分为与采集昆虫的寄主植物相关的簇。在草地贪夜蛾的玉米和棉种种群中未观察到遗传变异，这表明在巴西是相同的种群在危害这两种作物。由于巴西部分地区玉米和棉花作物在空间和时间上的重叠，本研究证实了对管理草地贪夜蛾的作物保护方法进行管理的必要性，以降低抗药性的发生率。
