Article
Variability of the 5S and 45S rDNA sites in Passiflora L. species with distinct base chromosome numbers.
Annals of botany - 1 Aug 2003
de Melo Natoniel Franklin, Guerra Marcelo
Abstract excerpt
Cytologically, the species of Passiflora with known chromosome number can be divided into four groups: (1) 2n = 12, 24, 36; (2) 2n = 24; (3) 2n = 18, 72; and (4) 2n = 20. The base chromosome number proposed for the genus is x = 6, with x = 9, x = 10 and x = 12 being considered secondary base numbers. In the present study, variability of 5S and 45S rDNA sites was investigated in 20 species of these four groups to...
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