Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2000.717.720Solanaceae]]>El-NahasAwatif I. F. KhalifaSayed. M. Abou-El-EnainMaged. 5200035Comparative karyological studies for 23 taxa of the Solanaceae have been presented and their taxonomic aspects are discussed. It was concluded that the origin of the family is a taxon with basic chronomosome number of x = 7 or 8 which gave rise to other taxa by aneuplodiy and polyploidy. Nictiana elate and Browallia viscose are found to be less evolved than the other species studied. Concerning the total form percentage (TF%) a reverse trend towards increasing the degree of karyotype symmetry with advancing evolution is concluded.]]>Al-Nowaihi, A.S. and S.F. Khalifa,197453224248Avery, A.G., S. Satina and J. Ritsems,1959Datura.]]>1959Bateson, W. and E.R. Sounders,19021902Chinnappa, C.C. and J.K. Morton,1979Astranthium integrifolium (Compositae).]]>66471473Clarke, C.B.,1885Solanaceae.]]>1885D'Arcy, W.G.,19791979pp: 3-48pp: 3-48Gottschalk, W.,195467369376Gupta, S.B.,1969Nicotiana plumbaginifolia and a hybrid derivative of N. tabacum showing chromosome instability.]]>11133142Gupta, R. and P.K. Gupta,1978Crotalaria Linn.]]>43357369Hair, J.B. and E.J. Beuzenberg,195818115841586Haque, M.S. and K.K. Ghoshal,1980Salvia Linn.]]>45627640Hunziker, A.T.,1979Solanaceae in the Neotropics: A Critical Appraisal.]]>1979pp: 355-364pp: 355-364Huziwara, Y.,196249116119Jackson, R.C.,1960Haplopappus gracilis.]]>14135136Lawrence, G.,1969pp: 693-695pp: 693-695Levan, A., K. Fredga and A.A. Sandberg,196452201220Levitsky, G.A.,193127220240Moore, D.M.,19781978pp: 39-56pp: 39-56Mourad, M.M.,19881988Naik, V.N.,1984pp: 94-184pp: 94-184Philomina, K.,1980Solanaceae.]]>59173176Rendle, A.B.,1952pp: 515-523pp: 515-523Soueges, R.,190761124Stebbins, G.L.,1974Tetenyi, P.,1987Solanaceae.]]>74600608Wettstein, R.V.,1895Solanaceae.]]>1895pp: 4-38pp: 4-38Willis, J.C. and H.K.A. Shaw,19667th Edn.,pp: 1047pp: 1047Babcock, E.B.,1947Crepis I. Taxonomy, phylogeny, distribution and evolution of Crepis.]]>211198Babcock, E.B.,1947Crepis II. Systematic treatment.]]>221991030