Abstract

In Senegal, millet occupies the most important place among the cereal crops. This cereal stocks are attacked by the Coleoptera, usch as Tribolium castaneum. This beetle attacks grains and causessignificant losses on stocks of beaten millet in the Sahelian zone. The objective of this study is togenetically characterize the populations of T. castaneum encountered in different agroecological zonesto identify the different haplotypes circulating in Senegal. The results showed that there are at least 12haplotypes of T. castaneum in Senegal. High haplotype diversity in the northern groundnut basin and high nucleotide diversity in the south of the groundnut basin were also noted. The cereal in the market of Sandiara was the cause of the wealth of haplotype and nucleotide diversity in the north of the groundnut basin. The high haplotype diversity and the low nucleotide diversity in the basin centered in eastern Senegal, high Casamance may be the result of rapid population growth from an ancestral population at low numbers. There was no significant genetic differentiation between agroecological zones. The strong genetic differentiation of some individuals with multiple mutations not in thehaplotype network was due to a structure based on the host plant.

Key words: Tribolium castaneum, agro-ecological zones, haplotype, genetic diversity.