Genetic diversity, outcrossing rate, and demographic history along a climatic gradient in the ruderal plant Ruellia nudiflora (Acanthaceae)
Ruellia nudiflorahas shown a high potential to easily invade disturbed areas. Outcrossing rate and genetic structure and diversity in this specieswere examined along a climatic gradient in the Yucatán Peninsula (Mexico) in order to understand the effects of environmental heterogeneity –isolation by...
| Authors: | , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2015 |
| Country: | México |
| Institution: | Universidad Autónoma de Yucatán |
| Repository: | Redalyc-UADY |
| OAI Identifier: | oai:redalyc.org:42539890016 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=42539890016 https://www.redalyc.org/journal/425/42539890016/ https://www.redalyc.org/journal/425/42539890016/html/ https://www.redalyc.org/journal/425/42539890016/42539890016.epub https://www.redalyc.org/journal/425/42539890016/movil |
| Access Level: | Open access |
| Keyword: | Biología AFLP Yucatán Herkogamy |
| Summary: | Ruellia nudiflorahas shown a high potential to easily invade disturbed areas. Outcrossing rate and genetic structure and diversity in this specieswere examined along a climatic gradient in the Yucatán Peninsula (Mexico) in order to understand the effects of environmental heterogeneity –isolation by environment (IBE) – as well as correlation in herkogamy on genetic structure, diversity, and demographic history in this species. Ninepopulations were sampled along a temperature-precipitation gradient with marked differences in vegetation, measuring the degree of herkogamy ineach sampled plant. To evaluate genetic diversity and structure, amplified fragment length polymorphism (AFLP) markers from 76 plants in thesepopulations were used, while the outcrossing rate was evaluated in 22 genetic families from six populations. All populations had high levels ofwithin-population genetic diversity and high outcrossing rates. Virtually all populations were also undergoing demographic and spatial expansion.The partial Mantel test found a positive correlation between geographic and genetic distance, but none between mean temperature, precipitation,and herkogamy with genetic distance. In this context,R. nudiflorashows incipient evidence of genetic differentiation on a small geographicalscale (isolation by distance, IBD) but not along the environmental gradient (IBE). Results suggest that under conditions of constant disturbance,R. nudiflorais able to continuously colonize new areas.All Rights Reserved © 2015 Universidad Nacional Autónoma de México, Instituto de Biología. This is an open access item distributed under theCreative Commons CC License BY-NC-ND 4.0. |
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