Microsatellite analysis of the breeding system and seed dispersal in Shorea leprosula (Dipterocarpaceae)
Nagamitsu, T.; Ichikawa, S.; Ozawa, M.; Shimamura, R.; Kachi, N.; Tsumura, Y.; Norwati, M.
International Journal of Plant Sciences 162(1): 155-159
The breeding system and seed dispersal in Shorea leprosula in peninsular Malaysia were studied. A microsatellite analysis was conducted of embryos of immature and mature fruits fallen in litter traps under the crowns of 5 trees. Outcrossed and selfed progeny mothered by the trees and those dispersed from other trees were identified using genotypes of 3 polymorphic microsatellite loci. The mean outcrossing of mature fruit embryos in S. leprosula pollinated by thrips was not lower than those previously reported from Shorea species pollinated by bees, despite the fact that thrips appear less efficient pollinators. Results indicated that inbreeding depression during fruit maturation and self-incompatibility reduce the proportion of inbred embryos.