biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 53:175-178, 2009 | DOI: 10.1007/s10535-009-0029-8

Different levels of inbreeding depression between outcrossing and selfing Serapias species

F. Bellusci1, G. Pellegrino1,*, A. Musacchio1
1 Dipartimento di Ecologia, Università della Calabria, Rende, Italy

We quantified inbreeding depression for fruit production, embryo vitality and seed germination in three deceptive orchids, Serapias vomeracea, S. cordigera and S. parviflora, which do not provide any reward to their pollinators, and are predicted to experience high outcrossing. Of the three species examined only S. parviflora was autonomously selfing. Both S. vomeracea and S. cordigera showed highly significant differences in fitness between selfed and outcrossed progenies, resulting in high levels of inbreeding depression, which increased in magnitude from seed set to seed germination. Inbreeding depression may promote outcrossing in Serapias by acting as a post-pollination barrier to selfing. Cumulative inbreeding depression across three stages in S. parviflora was lower that in both outcrossing species. The large difference in germination between selfed and outcrossed seeds is an important issue in conservation biology.

Keywords: autogamy; orchids; reproductive success
Subjects: inbreeding depression; Serapias species

Received: February 23, 2008; Accepted: September 10, 2008; Published: March 1, 2009  Show citation

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Bellusci, F., Pellegrino, G., & Musacchio, A. (2009). Different levels of inbreeding depression between outcrossing and selfing Serapias species. Biologia plantarum, 53(1), 175-178. doi: 10.1007/s10535-009-0029-8
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