Lagostina, Elisa (2018): Microsatellite markers and ITS sequences to investigate Usnea antarctica and U. aurantiacoatra species pair [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.892970
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Lichens are symbiotic associations consisting of a fungal (mycobiont) and one or more photosynthetic (photobionts) partners and are the dominant component, and most important primary producers, of Antarctic terrestrial ecosystems. The most common lichens in the maritime Antarctic are Usnea antarctica and U. aurantiacoatra, a so-called "species pair" in which U. antarctica shows asexual reproduction and propagation via soredia and U. aurantiacoatra forms ascospores in apothecia. Previous molecular analyses were not able to unambiguously distinguish the two morphotypes as species. Therefore, the goal of this study was to find out whether fast-evolving SSR (Single Sequence Repeats) markers are able to separate morphotypes more clearly and help to clarify their taxonomy. We investigate 190 individuals from five mixed stands of both morphotypes collected in King George Island and Elephant Island (South Shetland Islands, Antarctica). Based on 23 microsatellite markers designed from sequenced genomes, discriminant analysis of principal components (DAPC), Bayesian clustering analysis and coalescent-based estimation of gene flow show clear evidence for the existence of two different species distinguishable by reproductive mode. We did not detect any statistical association between genetic clusters and three previously reported chemical races of each species.
Related to:
Lagostina, Elisa; Dal Grande, Francesco; Ott, Sieglinde; Printzen, Christian (2017): Fungus-specific SSR markers in the Antarctic lichens Usnea antarctica and U. aurantiacoatra (Parmeliaceae, Ascomycota). Applications in Plant Sciences, 5(9), 1700054, https://doi.org/10.3732/apps.1700054
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Median Latitude: -61.765230 * Median Longitude: -57.231938 * South-bound Latitude: -62.252900 * West-bound Longitude: -58.992750 * North-bound Latitude: -61.216530 * East-bound Longitude: -55.358780
Date/Time Start: 2015-12-18T00:00:00 * Date/Time End: 2016-04-08T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Lagostina, E (2018): List of number of microsatellite repeats for 23 fungus specific locus in stands of Usnea antarctica and U. aurantiacoatra. https://doi.org/10.1594/PANGAEA.892967
- Lagostina, E (2018): nuc rDNA ITS1-5.8S-ITS2 region (ITS) sequences of 33 haplotypes (14 for U. antarctica and 19 for U. aurantiacoatra) with sampling locality information. https://doi.org/10.1594/PANGAEA.892969