1990
DOI: 10.1002/j.1537-2197.1990.tb11376.x
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Molecular Divergence Between Asian and North American Species of Liriodendron (Magnoliaceae) With Implications for Interpretation of Fossil Floras

Abstract: Botanists have long been aware of the floristic similarities between eastern Asia and eastern North America. Most who have considered this classic disjunction pattern have suggested that it arose through range disruption of a flora that was once more widely distributed in the Northern Hemisphere. There is less agreement on the timing of this process, with suggestions ranging from the Paleocene to the Neogene. In this study, molecular markers from two different plant genomes were used to assess the degree of ge… Show more

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Cited by 155 publications
(153 citation statements)
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“…The two species from eastern Asia (L. acalycina H. T. Chang and L. formosana Hance) are highly divergent from the eastern North American species (L. sturaciflua L.), with mean genetic identities of 0.485 and 0.431 respectively. These values are very similar to those reported by Parks and Wendel (1990) for the two disjunct species of Liriodendron.…”
Section: Enzyme Electrophoresissupporting
confidence: 90%
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“…The two species from eastern Asia (L. acalycina H. T. Chang and L. formosana Hance) are highly divergent from the eastern North American species (L. sturaciflua L.), with mean genetic identities of 0.485 and 0.431 respectively. These values are very similar to those reported by Parks and Wendel (1990) for the two disjunct species of Liriodendron.…”
Section: Enzyme Electrophoresissupporting
confidence: 90%
“…The electrophoretic data are inconclusive in placing A. rugosa closer to the eastern versus western North American species, i.e., A. rugosa is distinct from all other taxa (Vogelmann and Gastony 1987). Parks and Wendel (1990) carried out an extensive electrophoretic study ofthe well-known eastern Asia-eastern North American species pair Liriodendron chinense and L. tulipifera. The estimated divergence time from these data ranged from I 0 to 16 million years, depending on the method employed.…”
Section: Enzyme Electrophoresismentioning
confidence: 99%
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“…pumila in North America. Genetic divergence has been examined for several woody genera with disjunctions between eastern Asia and eastern North America, indicating a wide range in interspecific identities based on allozyme data: from I ¼ 0.273 between Merispermum dauricum and M. canadense (Lee et al, 1996) to I ¼ 0.434 between Liriodendron chinense and L. tulipifera (Parks and Wendel, 1990), and I ¼ 0.431 between Liquidambar formosana and L. styraciflua (Hoey and Parks, 1991) to I ¼ 0.712 between Magnolia officinalis var. biloba and M. tripetala (Qui et al, 1995) and I ¼ 0.809 between Magnolia officinalis var.…”
Section: Discussionmentioning
confidence: 99%
“…Burs with two to three nuts instead of one have been observed at low frequency on C. pumila trees. Lack of significant morphological changes in a species over a long period of time or morphological stasis has been observed in eastern Asian and eastern North American disjunct tree genera such as Liriodendron (Parks and Wendel, 1990), Liquidambar (Hoey and Parks, 1991), Magnolia (Qui et al, 1995), Gleditsia and several other taxa (Wen, 1999). Evolutionary constraints and stabilizing selection are proposed to be major mechanisms for morphological stasis (Wen, 1999).…”
Section: Discussionmentioning
confidence: 99%