XVI International Botanical Congess

Pollination biology, outcrossing rate, and population genetic structure of Aegiceras corniculatum, a cryptoviviparous mangrove species, were investigated. Pollination experiments suggested that the species is Pollinator-dependent. Multilocus outcrossing rate (tm), estimated using progeny arrays assayed for inter-simple sequence repeat (ISSR) markers, was 0.653. Both allozyme variation (P=4.76%, A=1.05, H=0.024) and ISSR diversity (P=16.18%, A=1.061, H=0.039) were very low at the species level in comparison with other woody plants with mixed mating systems. Genetic differentiation among populations was moderate (Gst=0.106-0.178). The unusually high levels of genetic identities (I=0.997 for allozymes and 0.992 for ISSRs), however, suggest that these populations are likely all descended from a common ancestral population with low polymorphism.