Morphological and Cytological Evidence for Homoploid Hybridization in Iochroma (Solanaceae)

Stacey De Witt Smith; Vanessa J. Kolberg; David A. Baum

doi:10.3120/0024-9637-55.4.280

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Stacey De Witt Smith, Vanessa J. Kolberg, David A. Baum

Abstract

Previous phylogenetic and biogeographic studies of Iochroma (Solanaceae) suggested that I. ayabacense S. Leiva is a hybrid between I. cyaneum (Lindl.) M. L. Green and I. lehmannii Bitter. Chromosome counts for these three taxa demonstrate that all have a haploid chromosome number of n = 12, and thus that the formation of I. ayabacense did not involve changes in ploidy level. A comparison of vegetative and floral morphology revealed that I. ayabacense demonstrates a striking intermediacy between I. cyaneum and I. lehmannii. The results support the conclusion that I. ayabacense is a homoploid hybrid between I. cyaneum and I. lehmannii.

Citation Download Citation

Stacey De Witt Smith, Vanessa J. Kolberg, and David A. Baum "Morphological and Cytological Evidence for Homoploid Hybridization in Iochroma (Solanaceae)," Madroño 55(4), 280-284, (31 October 2008). https://doi.org/10.3120/0024-9637-55.4.280

Published: 31 October 2008

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