Mating system of monoecious Araucaria angustifolia (Bert.) O. Kuntze, a predominately dioecious conifer species

Background Araucaria angustifolia (Bert.) O. Kuntze is a mainly dioecious species that reproduces through outcrossing. However, some monoecious trees have been identified and they may reproduce through self-fertilization. The objective of this study was to confirm the expected relatedness of self-sibs of hand self-pollinated monoecious seed trees, and to investigate the mating system of open-pollinated progenies of monoecious A. angustifolia trees.