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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2019, Volume : 7, Issue : 4
First page : (65) Last page : (72)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7696

Genetic Variability of Sitophilus zeamais Subservient to Millet in Senegal (West Africa)

Ngagne Demba SARR*, Toffène DIOME, Déthié NGOM and Mbacke Sembene
Faculty of sciences and Technology, Department of Animal Biology, BIOPASS Laboratory UMR 022 IRD-CBGP, University Cheikh Anta DIOP, Dakar, Senegal
*Corresponding Author E-mail: ngagnedembasarr@gmail.com
Received: 27.06.2019  |  Revised: 30.07.2019   |  Accepted: 6.08.2019  

 ABSTRACT

The millet is a plant very adapted to arid climatic conditions. Thus, it is exploited in many agroecological zones (AEZ) of Senegal where the Sahelian to Sahelo-Sudanese climate prevails. After rice, this cereal is the most consumed by Senegalese households. In addition to this vital function, millet plays an important role in the feeding of livestock and poultry. However, it is constantly under attack by pests like Sitophilus Zeamais, a beetle of the Curculionidae.
To overcome the enormous damage caused by the insect, without resorting to chemicals products whose use regularly harms living beings and the environment, we tried through this study to highlight the agroecological zones hostile or naturally favorable to the survival of S. Zeamais, by the genetic effects they present on its genome.
In fact, populations with low genetic diversity have fewer adaptive potentials than those that are genetically heterogeneous.
Thus, we sampled 43 insects of S. Zeamais subservient to millet on stocks infested in 4 agroecological zones that are: NBA , SBA , SOHC and BMC .
The exploitation of the Cytochrome B gene for sequences corresponding to these individuals has revealed a very high genetic homogeneity of SBA and SOHC insects, and a high genetic diversity of the NBA and BMC populations. Thus, the agroecological zones of the SBA and the SOHC, that are less exposed to genetic drift and natural selection, are more hostile to insect survival than NBA and BMC ones, that genetic heterogeneity caused by Genetic fluctuations contributed to the survival of S. Zeamais.

Keywords: Cytochrome B, Agroecological zone, Millet, Sitophilus Zeamais, Genetic diversity.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Ngagne Demb, S., Toffène, D., Déthié, N., & Mbacke, S. (2019). Genetic Variability of Sitophilus zeamais Subservient to Millet in Senegal (West Africa), Ind. J. Pure App. Biosci. 7(4), 65-72. doi: http://dx.doi.org/10.18782/2320-7051.7696