Article Sidebar
Article Details
Issue
Section
Articles
Submission of a paper for publication implies the transfer of the copyright from the author(s) to the publisher upon acceptance. International Formulae Group is therefore the copyright holder after publication of an article in International Journal of Biological and Chemical Sciences, and published articles should not be used for commercial purpose without the written consent of the Editor-in-Chief. They are licensed under a Creative Commons Attribution-Non Commercial-Share Alike 4.0 International License.
Main Article Content
The B chromosome in the meiotic process of the African pest grasshopper Taphronota thaelephora STAL. (Orthoptera: Pyrgomorphidae).
Abstract
This paper presents the first record of B chromosomes in some adult male individuals of the African pest grasshopper Taphronota thaelephora collected from Balepa – Mbouda in the Western Province of Cameroon. Of the twenty individuals examined, thirteen had the characteristic Pyrgomorphidae karyotype of 2N= 19(18A+XO) while the remaining seven had a diploid chromosome number of 2N= 20(18A+XO+1B) indicating the presence of a single B chromosome. The B chromosome in this population was short, acrocentric in morphology and stained to the same intensity as the autosomes throughout meiosis. It did not associate with any chromosome in meiosis. In some cells it migrated to the same pole as the X-chromosome while in other cells it migrated to the pole opposite to that of the X-chromosome indicating irregular behaviour in meiosis. The presence of the B chromosome did not affect chiasma frequency in the species.
International Journal of Biological & Chemical Sciences Vol. 1 (2) 2007: pp. 151-157
