ISSN:
1615-6110
Keywords:
Angiosperms
;
Datiscaceae
;
Datisca
;
Chloroplast DNA
;
polymerase chain reaction
;
restriction-site variation
;
interspecific variation
;
disjunct distributions
;
biogeography
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Datisca (Datiscaceae) is a ditypic genus with an intercontinentally disjunct distribution. Chloroplast DNA restriction site data was obtained from 23 populations and four 10–20 year old herbarium specimens ofD. glomerata and three populations ofD. cannabina from throughout their geographic ranges in western North America and southwest-central Asia, respectively. InD. glomerata, plastome diversity is partitioned geographically. All populations from southern California have a common plastome, while most populations north of this region share a relatively divergent plastome (0.49% sequence divergence). Likewise, these plastomes are highly divergent (0.87% mean sequence divergence) from those found inD. cannabina. Biogeographic processes dating to the Pleistocene and Late Miocene may be responsible for these intra- and interspecific patterns of chloroplast DNA divergence.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00937591
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