Lower selfing rates in metallicolous populations than in non-metallicolous populations of the pseudometallophyte Noccaea caerulescens (Brassicaceae) in Southern France

Annals of Botany
Mathilde MoussetAgnès Mignot

Abstract

The pseudometallophyte Noccaea caerulescens is an excellent model to study evolutionary processes, as it grows both on normal and on heavy-metal-rich, toxic soils. The evolution and demography of populations are critically impacted by mating system and, yet, information about the N. caerulescens mating system is limited. Mean selfing rates were assessed using microsatellite loci and a robust estimation method (RMES) in five metallicolous and five non-metallicolous populations of N. caerulescens in Southern France, and this measure was replicated for two successive reproductive seasons. As a part of the study, the patterns of gene flow among populations were analysed. The mating system was then characterized at a fine spatial scale in three populations using the MLTR method on progeny arrays. The results confirm that N. caerulescens has a mixed mating system, with selfing rates ranging from 0·2 to 0·5. Selfing rates did not vary much among populations within ecotypes, but were lower in the metallicolous than in the non-metallicolous ecotype, in both seasons. Effective population size was also lower in non-metallicolous populations. Biparental inbreeding was null to moderate. Differentiation among populations was generally high, ...Continue Reading

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Citations

Nov 14, 2016·Environmental Science and Pollution Research International·Gülriz BayçuMichael Moustakas
Jan 31, 2019·International Journal of Phytoremediation·Thibault SterckemanCatherine Sirguey
Jul 8, 2017·AoB Plants·Ling-Na ChenHan-Qi Yang
Sep 14, 2019·Molecular Ecology Resources·Jack ColicchioJohn K Kelly

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