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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Microspatial population genetic structure of the Mediterranean shrub Fumana thymifolia
Author(s): Jump, Alistair
Rico, Laura
Lloret, Francisco
Penuelas, Josep
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Keywords: spatial genetic structure
Plant breeding
Plant genetics
Seeds Dispersal
Issue Date: Mar-2009
Date Deposited: 24-Feb-2009
Citation: Jump A, Rico L, Lloret F & Penuelas J (2009) Microspatial population genetic structure of the Mediterranean shrub Fumana thymifolia. Plant Biology, 11 (2), pp. 152-160.
Abstract: Fumana thymifolia (Cistaceae) is an insect-pollinated, gravity-dispersed evergreen shrub, which is a common component of fire-prone Mediterranean shrubland ecosystems. Despite the availability of basic knowledge on its ecology, little is known of its breeding system and no information is available on its population genetic structure. We explored the within-population genetic structure of this species using amplified fragment length polymorphism (AFLP) molecular markers and related this to predictions based on its breeding system, pollen and seed dispersal. Existing information on the reproductive ecology of F. thymifolia was supplemented by artificial pollination experiments. We determined that self-fertilisation can occur in F. thymifolia but results in reduced fruit set. Significant genetic structuring was detected within the population, a likely consequence of localised seed dispersal in combination with a mixed mating system. In a study site covering approximately 0.5 ha, AMOVA revealed that approximately 9% of genetic variability was distributed among population subsamples. Significant spatial genetic structure was detected, with kinship coefficients being significantly elevated above the null expectation in the first six distance classes (maximum 5 m), and a value of Sp of up to 0.0342, comparable with species having similar ecological characteristics. Weak isolation by distance at the plot scale was detected, suggesting that insect-mediated pollen flow is non-random, despite being more extensive than seed dispersal. Fumana thymifolia provides a promising model for the investigation of both short- and longterm population dynamics in relation to fire frequency within this plant community.
DOI Link: 10.1111/j.1438-8677.2008.00109.x
Rights: Published by Blackwell Publishing (for German Botanical Society and The Royal Botanical Society of the Netherlands). The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.
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