Skip to main content

Phylogenetic relationships among species of the neotropical genus Randia (Rubiaceae, Gardenieae) inferred from molecular and morphological data

Buy Article:

$16.27 plus tax (Refund Policy)

Abstract:

Relationships among 38 taxa of Randia (Rubiaceae, Gardenieae) are estimated using nuclear ribosomal internal transcribed spacers (ITS), the 5S non-transcribed spacer (5S-NTS), and six morphological characters. In addition to Randia, 13 species from eight related genera in Gardenieae (four African, four neotropical) formed the ingroup. Three species from three more distantly related genera in Gardenieae (one African, two neotropical) were chosen as the outgroup. Representatives of the African ingroup genera Calochone, Macrosphyra, Oligocodon and Preussiodora formed a well supported monophyletic group as did the neotropical genera Rosenbergiodendron, Sphinctanthus and Tocoyena. Only when including morphological characters did Randia form a monophyletic group corresponding approximately to contemporary circumscription of the genus, but in this analysis Casasia appears sister to a group of Mexican, Central American, and Antillean Randia. There is no strong jackknife support, however, for either Randia or Casasia to be monophyletic. It is concluded that Randia is comprised of several distinct groups, each with its own geographical distribution. One group of Mexican, Central American, and Antillean Randia, including the type species, can be recognized as Randia in a strict sense. Two other South American groups can be recognized as separate taxa. One of these groups comprises mainly lowland species, and the second is comprised of strictly Andean species.

Keywords: ITS AND 5S OF NRDNA; MOLECULAR PHYLOGENETICS; MORPHOLOGY; RANDIA; RUBIACEAE

Document Type: Miscellaneous

Affiliations: Botanical Institute, Göteborg University, Box 461, S-405 30 Göteborg, Sweden

Publication date: 2002-11-01

  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more