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Cytogenetic Characterization of Species and Hybrids of Orchids of <i>Cattleya</i> Genus

2017; International Society of Cytology; Volume: 82; Issue: 2 Linguagem: Inglês

10.1508/cytologia.82.137

1348-7019

Gizelly Mendes da Silva, Tatiane Lemos Varella, Isane Vera Karsburg, Telma Nair Santana, Ílio Fealho de Carvalho, Rogério Benedito da Silva Añez, Ana Aparecida Bandini Rossi, Maurecilne Lemes da Silva,

Plant tissue culture and regeneration

This paper aims to study the cytogenetic characterization of Cattleya nobilior species and C. bowringiana and hybrids of orchids C. violacea "type"×C. granulosa, C. violacea "type"×C. harrisoniae "perola," and C. violacea "type"×C. nobilior "amaliae." Cattleya nobilior has 2n=2x=30 metacentric chromosomes, with size ranging from 0.54 to 1.58 µm and an active NOR in the first chromosome pair, and C. bowringiana has 2n=2x=34 metacentric chromosomes, from 0.38 to 1.46 µm of size and an active NOR in the first chromosome pair. As for the hybrids, C. violacea "type"×C. harrisoniae "pérola" has 2n=2x=32 metacentric chromosomes, with size from 0.47 to 1.73 µm and an active NOR in the second chromosome pair, C. violacea "type"×C. nobilior "amaliae" has 2n=2x=66 metacentric chromosomes, with size between 0.22 to 1.48 µm and active NORs in chromosome pairs 1 and 3, and C. violacea "type"×C. granulosa with 2n=2x=86 metacentric chromosomes, with size from 0.26 to 1.56 µm and an active NOR in chromosome pairs 3 and 23.