Estimation of mating system parameter of Albizia julibrissin (Fabaceae)
1997
Godt, M.J.W. (Georgia Univ., Athens (USA). Dept. of Botany) | Hamrick, J.L.
Quantitative estimates of the mating system of Albizia julibrissin, an entomophilous mimosoid leguminous tree, were obtained using six polymorphic allozyme markers. Thirty-six progeny from 24 to 25 maternal families from each of three Georgia populations were analyzed. Despite life history characteristics and pollinator behavior that suggest a potential for inbreeding, mean single and multilocus outcrossing rates did not differ significantly from 1.0 for any population, or for any maternal family. These results strongly suggest that mimosa is self-incompatible. Biparental inbreeding was insignificant even though seed dispersal via wind-dispersed pods suggests that related individuals may establish in close proximity to one another. Significant heterogeneity was found among the pollen pools of maternal individuals belonging to the same population, indicating that mating does not occur at random within these populations
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