GENETIC AND CLONAL DIVERSITY OF TWO CATTAIL SPECIES, TYPHA LATIFOUA AND T ANGUSTIFOLIA (TYPHACEAE), FROM UKRAINE
OLGA V. TSYUSKO, MICHAEL H. SMITH, REBECCA R. SHARITZ, AND
TRAVIS C. GLENN
The University of Georgia, Institute of Ecology, Savannah
River Ecology Laboratory, Drawer E, Aiken, South Carolina 29802 USA
Genetic and clonal diversity vary between two closely related cattail
species (Typha angustifolia and T. latifolia) from Ukraine.
This diversity was calculated from microsatellite data. Forty-eight percent
of the total variation was partitioned between species, which formed distinct
clusters in a dendrogram with no indication of hybrid populations. Typha
angustifolia had higher heterozygosity at the species (Hes
= 0.66) and population (Hep = 0.49) levels than did
T. latifolia (Hes = 0.37 and Hop = 0.29,
respectively). The higher number of alleles in T. angustifolia
may be indicative of larger effective population sizes due to its higher
seed production. Clonal diversity of T. angustifolia was lower
than that of T. latifolia (N/N, = 0.40 and 0.61, Simpson's D
= 0.82 and 0.94, respectively). Correlations between clonal and genetic
diversity were higher for T. latifolia than T. angustifolia,
suggesting that the importance of factors and their interactions affecting
this relationship are different for the two species. Latitudinal and longitudinal
trends were not observed in either species despite the large sampling
area. Population differentiation was relatively high with F ST
of 0.24 and 0.29 for T. angustifolia and T. latifolia,
respectively. Weak isolation by distance was observed for T. latifolia
but not for T. angustifolia.
Key words: cattails; clonal structure; genetic diversity;
microsatellites; Typha angustifolia; Typha latifolia; Ukraine.
SREL Reprint #2879
Tsyusko, O. V., M. H. Smith, R. R. Sharitz and T. C. Glenn. 2005. Genetic and clonal diversity of two cattail species, Typha latifolia and T. angustifolia (Typhaceae), from Ukraine. American Journal of Botany 92:1161-1169.
