Pollen competition in Populus nigra females revealed by microsatellite markers
2003
Vanden Broeck, A.,Institute for Forestry and Game Management, Geraardsbergen (Belgium). Research Station of the Flemish Community | Quataert, P.,Institute for Forestry and Game Management, Geraardsbergen (Belgium). Research Station of the Flemish Community | Roldan-Ruiz, I.,Agricultural Research Centre, Melle (Belgium). Department for Plant Genetics and Breeding | Bockstaele, E. van,Agricultural Research Centre, Melle (Belgium). Department for Plant Genetics and Breeding | Slycken, J. van,Institute for Forestry and Game Management, Geraardsbergen (Belgium). Research Station of the Flemish Community
The hypothesis of pollen competition between pollen of Populus nigra L. and of Populus . canadensis Moench (syn. Populus . euramericana (Dode) Guinier) in fertilising P. nigra ovules was tested by analysing the offspring of a series of controlled species mixed crosses. Exclusion analysis was performed on nuclear microsatellite data to identify the paternal genotype of each seedling for each controlled cross. Evidence is presented for non-random mating between P. nigra and P. . canadensis pollen in fertilising P. nigra ovules; pollen of P. nigra was much more successful in fertilising P. nigra females than pollen of P. . canadensis. The results of this study help explain the low levels of introgression reported in open pollinated offspring of P. nigra in natural populations.
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