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Some Pieces of the African Genome Puzzle in Hibiscus Sect. Furcaria (Malvaceae)

M. Y. Menzel, S. G. Goetz and W. C. Adamson
American Journal of Botany
Vol. 70, No. 2 (Feb., 1983), pp. 285-297
Stable URL: http://www.jstor.org/stable/2443274
Page Count: 13
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Some Pieces of the African Genome Puzzle in Hibiscus Sect. Furcaria (Malvaceae)
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Abstract

New chromosome counts are reported for four African diploid species of Hibiscus L. sect. Furcaria DC.: H. greenwayi Bak. f., H. hiernianus Exell et Mendonca, and H. mechowii Garcke, n = 18; and H. berberidifolius A. Rich., 2n = 36. Chromosome behavior is described in seven new hybrid combinations. Hibiscus greenwayi is shown to carry an A genome. Hibiscus hiernianus and H. mastersianus have similar genomes which are not homologous with that of H mechowii. New and earlier data are integrated to elucidate genome relationships among 13 taxa-each of the four tetraploid species has a different formula encompassing 2 of 6 mutually nonhomologous genomes, A, B, G, H, X and Y (H. acetosella Welw. ex Hiern = AABB; H. meeusei Exell = AAXX; H. sabdariffa L. = AAYY; H. rostellatus Guill. et Perr. = GGHH). Diploid donors of A, B, G, X and Y are proposed on the basis of plant, flower and pollen morphology. Diploid carriers of A (H. asper Hook. f., H cannabinus L., H greenwayi), B (H. surattensis L.) and G (H. sudanensis Hochr.) have been verified cytologically. Cytological confirmation of X (H. hiernianus, H. mastersianus Hiern) and Y (H mechowii) carriers is incomplete. No putative diploid carrier of H is at hand. Genome affinities of H berberidifolius are unknown.

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