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Cytological studies of some species of the genus Clusia L. (Guttiferae)

Neusa Diniz da Cruz⁺; Yone M. Sellito Boaventura; Yanni M. Sellito

Seção de Citologia, Instituto Agronômico, Caixa Postal 28, 13020 Campinas, SP, Brasil
⁺Deceased, March, 1990

ABSTRACT

Chromosome number and meiotic behaviour are reported for the first time for five Brazilian species of Clusia L. (Guttiferae) which belong to three different sections of the genus: Cordylandra, Eucriuva and Phloianthera. All five species have n = 30 chromosomes and thus do not display any polyploidy or secondary base numbers which are such striking features among species of other genera of this family.
These Clusia species have mainly normal meiosis with metaphase I showing predominantly bivalent formation and with more than 80% viable pollen. Some cases of univalents, secondary associations and cytomixis were observed, but no occurrence of multivalent formation such as trivalents or quadrivalents, was recorded for any pollen mother cell. These cytological data for Clusia are discussed within the context of available chromosome information for the family.

Keywords: Cytological; Clusia; Guttiferae.

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