Geographic genetic structure of Iberian columbines (gen. Aquilegia)

Garrido, Jose L, Alcantara, Julio M, Rey, Pedro J, Medrano, Monica, Guitian, Javier, Castellanos, María C, Bastida, Jesus M, Jaime, Rafael and Herrera, Carlos M (2017) Geographic genetic structure of Iberian columbines (gen. Aquilegia). Plant Systematics and Evolution, 303 (9). pp. 1145-1160. ISSN 0378-2697

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Abstract

Southern European columbines (genus Aquilegia)are involved in active processes of diversification, and the Iberian Peninsula offers a privileged observatory to witness the process. Studies on Iberian columbines have provided significant advances on species diversification,but we still lack a complete perspective of the genetic diversification in the Iberian scenario. This work explores how genetic diversity of the genus Aquilegia is geographically structured across the Iberian Peninsula. We used Bayesian clustering methods, principal coordinates analyses, and NJ phenograms to assess the genetic relationships among 285 individuals from 62 locations and detect the main lineages. Genetic diversity of Iberian columbines consists of five geographically structured lineages, corresponding to different Iberian taxa. Differentiation among lineages shows particularly complex admixture patterns at Northeast and highly homogeneous toward Northwest and Southeast. This geographic genetic structure suggests the existence of incomplete lineage sorting and interspecific hybridization as could be expected in recent processes of diversification under the influence of quaternary postglacial migrations. This scenario is consistent with what is proposed by the most recent studies on European and Iberian columbines, which point to geographic isolation and divergent selection by habitat specialization as the main diversification drivers of the Iberian Aquilegia complex.

Item Type: Article
Keywords: AFLP Aquilegia Diversification Iberian Peninsula Quaternary postglacial migrations Spatial genetic structure
Schools and Departments: School of Life Sciences > Evolution, Behaviour and Environment
Subjects: Q Science > QH Natural history > QH0301 Biology > QH0359 Evolution
Q Science > QK Botany > QK0001 General Including geographical distribution
Q Science > QK Botany > QK0900 Plant ecology
Depositing User: MariaClara Castellanos
Date Deposited: 26 Feb 2018 09:37
Last Modified: 09 Jun 2018 01:00
URI: http://sro.sussex.ac.uk/id/eprint/73745

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