Evolutionary consequences of seed banks and seed dispersal in Arabidopsis
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摘要: Premise of the Study: Seed banks may increase effective population size (N(e)) plants as a result elevated coalescence times for alleles residing in populations. This has been empirically demonstrated populations annual Arabidopsis thaliana, whereas comparable data perennial species are currently lacking. We studied contribution seed to sizes natural self-incompatible, lyrata subsp. petraea, close relative A. thaliana. Methods: Fourteen collected throughout Norwegian distribution range were analyzed using micro-satellite markers. Key Results: The genetic composition seed-bank and aboveground cohorts was found be highly similar, with little differentiation between most However, proportion private higher than cohorts. presence significantly increased total N(e), but from overall N(e) lower Estimated historical values, reflecting history species, considerably estimates contemporary number reproducing individuals within past few generations. Conclusions: results show that bank contributes herb lyrata. is similar or above-ground fraction markedly weaker previously documented
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