Futile Selfing in the Trees Fuchsia excorticata (Onagraceae) and Sophora microphylla (Fabaceae): Inbreeding Depression over 11 Years

Mixed mating (producing a mix of selfed and outcrossed seed) is common in flowering plants and is ecologically important because it potentially offers reproductive assurance against pollination failure. However, selfed seed offers no reproductive assurance unless it overcomes inbreeding depression....

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Bibliographic Details
Published in:International journal of plant sciences 2011-02, Vol.172no (2), p.191-198
Main Authors: Robertson, Alastair W, Kelly, Dave, Ladley, Jenny J
Format: Article
Language:English
Subjects:
adulthood
adults
Flowers & plants
Fuchsia
Germination
inbreeding
inbreeding depression
Plant ecology
Plant reproduction
Plant sciences
pollination
progeny
recruitment
seedling production
seedlings
selfing
Sophora
trees
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Summary:Mixed mating (producing a mix of selfed and outcrossed seed) is common in flowering plants and is ecologically important because it potentially offers reproductive assurance against pollination failure. However, selfed seed offers no reproductive assurance unless it overcomes inbreeding depression. In trees and other long-lived plants, genetic evidence suggests that selfed seed seldom matures to adulthood, presumably because of severe inbreeding depression. We measured inbreeding depression over 11 yr in two populations each of two New Zealand trees, Fuchsia excorticata and Sophora microphylla, from pollination to germination and performance in both pots and the field. The accumulated inbreeding depression was very high in both cases (F. excorticata: and 0.84; S. microphylla: and 0.99) and largely late acting, especially in F. excorticata. Fewer than 10% (and
ISSN:1058-5893
1537-5315
DOI:10.1086/657678