β Scribed by A. E. Adegbite; M. S. Ayodele
No coin nor oath required. For personal study only.
Chromosome studies were carried out on some Nigerian species of Vernonia. Chromosome counts of n = 9 (2__n__ = 18) and n = 10 (2__n__ = 20) were recorded for the species considered. Hybridization, polyploidy and aneuploid decrease have been implicated as major mechanisms of evolution in the genus. Evidence from this work and previous studies have been invoked to suggest the evolution of the Vernonia species from closely related ancient species with basic chromosome number of x = 4 and x = 5. A phylogenetic chart of chromosome number evolution is proposed. (Β© 2004 WILEYβVCH Verlag GmbH & Co. KGaA, Weinheim)
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As an endangered animal group, musk deer (genus Moschus) are not only a great concern of wildlife conservation, but also of special interest to evolutionary studies due to long-standing arguments on the taxonomic and phylogenetic associations in this group. Using museum samples, we sequenced complet