Diversity and Genetic Structuration of Populations of Plutella xylostella (Lepidoptera, Plutellidae), Cabbage Farming Destroyer in Senegal

T. Diome, M. Faye, M. Seck, Cheikh Tidiane Niass, M. Sembéne
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Abstract

Plutella xylostella, pointed out as the most dangerous destroyer of cabbage (Brassica olerarea), is a cosmopolitan species. In fact, owing to its large capacity of adaptation, P. xylestella colonizes any kind of area. This insect can bring about up to 90% of losses on cabbage farming. To control the insect, Senegalese farmers, very often, resort to high dose of chemical pesticides which are repetitively sprayed. The use of these chemical products gives rise to different varieties of resistant insects, which results in the emergence of different haplotypes between populations. It is in such a context that this study has been undertaken. Our objective is then to contribute to the knowledge of the genetic diversity of P. xylostella populations in Senegal. To hit the target, PCR-Sequencing method has been applied on samples from the five following localities: Diofior, Malika, Mboro, Santh Ndong, and Sebikotane. P. xylostella from Mboro is genetically different from the other populations. This fact could be due to a different way of using pesticides in this area vis-à-vis of the other localities. On the other hand, between populations of P. xylostella from Diofior, Malika, Santh
塞内加尔菜田害虫小菜蛾(鳞翅目,小菜蛾科)种群多样性及遗传结构
小菜蛾(Plutella xylostella)是一种世界性的植物,被认为是甘蓝(Brassica olerarea)最危险的破坏者。事实上,由于其巨大的适应能力,木藻可以在任何地区殖民。这种昆虫可造成白菜种植高达90%的损失。为了控制这种昆虫,塞内加尔农民经常使用高剂量的化学农药,反复喷洒。这些化学产品的使用产生了不同种类的抗性昆虫,从而导致种群之间出现不同的单倍型。这项研究就是在这样的背景下进行的。我们的目标是为塞内加尔小菜蛾种群遗传多样性的知识做出贡献。为了达到目标,pcr测序方法应用于以下5个地区的样本:Diofior、Malika、Mboro、Santh Ndong和Sebikotane。来自Mboro的小菜蛾在遗传上与其他种群不同。这一事实可能是由于该地区使用杀虫剂的方式与其他地区-à-vis不同。另一方面,来自difior, Malika, Santh的小菜蛾种群之间的差异
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