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American Journal of Botany, Vol 84, 456, Copyright © 1997 by Botanical Society of America, Inc.

REPRODUCTIVE BIOLOGY

The mating system of the tropical understory shrub Ardisia escallonioides (Myrsinaceae)

JB Pascarella

Electrophoretic analysis of progeny arrays was used to determine whether Ardisia escallonioides (Myrsinaceae). a self-compatible tropical understory shrub in south Florida, exhibits a mixed-mating system. Ten seedlings from seven to 16 maternal plants from four populations were analyzed using five polymorphic enzyme systems. Multilocus population out-crossing rates ranged from 0.39 to > 1, with three populations showing high levels of selfing. Both single and multilocus inbreeding coefficients (F) indicated excess homozygosity in seedlings but not adults for three of the four populations. Population outcrossing rate was not positively correlated with increased numbers of flowering plants. The importance of annual variation in population outcrossing rates is discussed with regard to the high temporal variability in seedling recruitment in this species.


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