2003 年 68 巻 2 号 p. 165-171
It was described karyotypes of 6 species (2n=18) collected in Rio de Janeiro, P. alata, P. edmundoi, P. malacophylla, P. mucronata, P. galbana, P. quadrangularis. To do that young root tips were either obtained from seedling or adult plants. The arm ratio for each chromosome (r), total haploid chromatin length (THC), and asymmetry index (TF%) were calculated. Some differences as THC, TF%, position of the centromere, and number, type and position of satellites were observed among the species studied. The species showed metacentric and submetacentric chromosomes, except P. galbana that showed only metacentric chromosomes. P. malacophylla revealed the smallest THC (14.67 μm) while P. quadrangularis revealed the largest (33.58 μm). The karyotypes varied in relation to other specimens studied and this result, allied to chromosome segregation studies, suggests the existence of intraspecific karyotypic variation in Passiflora species.
