Quantitive estimates of outcrossing rates in a natural population of Sagittaria potamogetifolia

The outcrossing rates of two subpopulations in a population of Sagittaria potamogetifolia were estimated by sampling from natural habitats and using single genetic marker locus. The value of subpopulation I (t̄̂I = (81. 9 ± 24.1)%) is remarkably higher than that of subpopulation II (t̄̂I = (50. 0 ± 24. 5)%), while subpopulation II had a higher density. For the monoecius spicies S. potamogetifolia, a rate of selfing in a population should be due to the pollination between different inflorescences of same plant, and the levels of selfing/outcrossing in populations should be dependent on the frequency of the individuals with more than two inflorescences.

Duke Scholars

Author Xiao-Fan Wang Pharmacology & Cancer Biology