University of Nebraska Department of Entomology, 312 F Plant Industry Building, Lincoln, NE, 68583-0816, USA.
J Insect Sci. 2007;7:5. doi: 10.1673/031.007.0501.
Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), the fall armyworm is the most economically important maize pest in the western hemisphere. This research focused on the genetic variability of the maize host strain because there is a lack of information in this area of S. frugiperda research. Amplified fragment length polymorphism (AFLP) was used to assess the genetic variability of S. frugiperda over a large geographic area. Twenty populations were collected from the maize, one population was collected from princess tree, one population was collected from lemon tree, and one population was collected from bermudagrass. The 23 populations were from Mexico, the continental United States, Puerto Rico, Brazil, and Argentina. The objective of this research was to evaluate whether the majority of genetic variability was within populations or between populations. The AFLP results showed that the majority of the genetic variability is within populations and not between populations, indicating minor gene flow and suggesting that S. frugiperda in the Western Hemisphere are an interbreeding population.
草地贪夜蛾（Spodoptera frugiperda）（鳞翅目：夜蛾科）是西半球最重要的玉米害虫。本研究集中于玉米宿主品系的遗传变异性，因为在草地贪夜蛾研究的这一领域缺乏信息。扩增片段长度多态性（AFLP）用于评估草地贪夜蛾在大地理区域的遗传变异性。从玉米中收集了 20 个种群，从梧桐中收集了 1 个种群，从柠檬树中收集了 1 个种群，从百慕大草中收集了 1 个种群。这 23 个种群来自墨西哥、美国大陆、波多黎各、巴西和阿根廷。本研究的目的是评估大多数遗传变异性是在种群内还是在种群间。AFLP 结果表明，大多数遗传变异性是在种群内，而不是在种群间，这表明基因流较小，并表明西半球的草地贪夜蛾是一个杂交种群。
