01207naa a2200169 a 450000100080000000500110000800800410001910000200006024501200008026000090020052007020020965000150091170000160092670000160094270000200095877300590097816483242023-03-30       1995    bl uuuu     u00u1 u    #d1 aNOGUEIRA, C. Z.  aKaryotypic study of some species of serjania and urvilllea (Sapindaceae; Tribe Paullinieae).h[electronic resource]  c1995  aKaryotypes of six species (in ten populations) of the genus Serjania and one species of the genus Urvillea were studied using root tip mitotic metaphases. All species of Serjania were diploids with 2n = 24 chromosomes and the species of Urvilllea was octoploid with 2n = 86 chromosomes. Analysis of the karyotypes of Serjania showed that the species are differentiated by chromosomic structural changes. Chromosome lengths showed great differences among the species that may be explained by chromosomal deletion or addition. The basic chromosomic number is x = 12 for Serjania and x = 11 for Urvillea. In Urvillea the evolutionary trend may be toward polyploidy followed by reductional aneuploidy.  aCariótipo1 aRUAS, P. M.1 aRUAS, C. F.1 aFERRUCCI, M. S.  tAmerican Journal of Botanygv.82, n.5, p.646-654, 1995