Joint inferences from cytoplasmic DNA and fossil data provide evidence for glacial vicariance and contrasted post-glacial dynamics in tamarack, a transcontinental conifer

10Citations
Citations of this article
24Readers
Mendeley users who have this article in their library.

Abstract

Aim: Tamarack (Larix laricina) is an early-successional transcontinental boreal conifer occurring within the spruce-fir dominated forest. The aim was to infer the species biogeographical history and to assess the putative genetic imprint left by interspecific competition during post-glacial migration, using cytoplasmic DNA and fossil data. Location: Forty-five locations were sampled across the transcontinental range spanning the North American boreal forest. Methods: A total of 621 trees were scanned for mitochondrial and chloroplast DNA polymorphisms to reveal geographical patterns of genetic diversity, differentiation, and population structure throughout the species range. Published pollen records were analysed to assess the chronology of post-glacial colonization of Larix sp. relative to more competitive tree taxa, Picea sp. and Abies sp.. Results: Genotyping resulted in two mitotypes (one locus) and 24 chlorotypes (three cpSSR loci). Bayesian assignment test based on cpDNA data detected three groups: eastern North America, western North America and Alaska. CpDNA population differentiation was higher in the western part of the range relative to the eastern part. Post-glacial colonization chronology derived from fossil data indicated that Larix colonized western North America at least 4000 years after Picea and Abies, but shortly preceded them in eastern North America. Main conclusions: Cytoplasmic and fossil data provided support for four distinct glacial lineages. Two lineages would have persisted south of the Laurentide ice sheet, while the two remaining ones likely originate from northern refugia located in Beringia and Labrador. Larix establishment was possibly hindered by earlier establishment of more competitive taxa in western North America, which resulted in high genetic differentiation among western populations. These results provide support for a putative role of interspecific competition in structuring the standing genetic variation at the time of post-glacial colonization.

References Powered by Scopus

GENEPOP'007: A complete re-implementation of the GENEPOP software for Windows and Linux

7495Citations
N/AReaders
Get full text

FSTAT (Version 1.2): A Computer Program to Calculate F-statistics

6795Citations
N/AReaders
Get full text

The genetic legacy of the quaternary ice ages

5800Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Invoking adaptation to decipher the genetic legacy of past climate change

68Citations
N/AReaders
Get full text

Legacy of the Last Glacial on the present-day distribution of deciduous versus evergreen boreal forests

37Citations
N/AReaders
Get full text

The critical role of local refugia in postglacial colonization of Chinese pine: joint inferences from DNA analyses, pollen records, and species distribution modeling

25Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Warren, E., de Lafontaine, G., Gérardi, S., Senneville, S., Beaulieu, J., Perron, M., … Bousquet, J. (2016). Joint inferences from cytoplasmic DNA and fossil data provide evidence for glacial vicariance and contrasted post-glacial dynamics in tamarack, a transcontinental conifer. Journal of Biogeography, 43(6), 1227–1241. https://doi.org/10.1111/jbi.12675

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 11

55%

Researcher 6

30%

Professor / Associate Prof. 2

10%

Lecturer / Post doc 1

5%

Readers' Discipline

Tooltip

Agricultural and Biological Sciences 13

59%

Environmental Science 6

27%

Earth and Planetary Sciences 2

9%

Business, Management and Accounting 1

5%

Save time finding and organizing research with Mendeley

Sign up for free