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Evolution of Seed Dormancy Due to Sib Competition: Effect of Dispersal and Inbreeding

✍ Scribed by YUTAKA KOBAYASHI; NORIO YAMAMURA

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 213 KB
Volume: 202
Category: Article
ISSN: 0022-5193
DOI: 10.1006/jtbi.1999.1027

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✦ Synopsis

The e!ect of dispersal and inbreeding on the evolution of seed dormancy to avoid sib competition is theoretically investigated, using a model which assumes a plant population with patchy spatial structure in a constant environment. Applying the inclusive "tness method, the evolutionarily stable dormancy rates are analytically derived for three cases: (a) an asexual haploid population, (b) a diploid-hermaphrodite population in which the dormancy rate is controlled by seeds, and (c) a diploid-hermaphrodite population in which the dormancy rate is controlled by mother plants. The evolutionarily stable dormancy rates decrease in the order of case (c), case (a), and case (b). In all the cases, the evolutionarily stable dormancy rates increase with decreasing the dispersal rate. Although inbreeding generally increases the evolutionarily stable dormancy rates, inbreeding due to sel"ng reduces the rate exceptionally in case (c).

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