Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait
Background and Aims Although it is well known that fire acts as a selective pressure shaping plant phenotypes, there are no quantitative estimates of the heritability of any trait related to plant persistence under recurrent fires, such as serotiny. In this study, the heritability of serotiny in Pinus halepensis is calculated, and an evaluation is made as to whether fire has left a selection signature on the level of serotiny among populations by comparing the genetic divergence of serotiny with the expected divergence of neutral molecular markers (QST-FST comparison). Methods A common garden of P. halepensis was used, located in inland Spain and composed of 145 open pollinated families from 29 provenances covering the entire natural range of P. halepensis in the Iberian Peninsula and Balearic Islands. Narrow-sense heritability (h2) and quantitative genetic differentiation among populations for serotiny (QST) were estimated by means of an 'animal model' fitted by Bayesian inference. In order to determine whether genetic differentiation for serotiny is the result of differential natural selection, QST estimates for serotiny were compared with FST estimates obtained fromallozyme data. Finally, a testwas made of whether levels of serotiny in the different provenances were related to different fire regimes, using summer rainfall as a proxy for fire regime in each provenance. Key Results Serotiny showed a significant narrow-sense heritability (h2) of 0.20 (credible interval 0.09-0.40). Quantitative genetic differentiation among provenances for serotiny (QST = 0.44) was significantly higher than expected under a neutral process (FST = 0.12), suggesting adaptive differentiation. A significant negative relationship was found between the serotiny level of trees in the common garden and summer rainfall of their provenance sites. Conclusions Serotiny is a heritable trait in P. halepensis, and selection acts on it, giving rise to contrasting serotiny levels among populations depending on the fire regime, and supporting the role of fire in generating genetic divergence for adaptive traits. © 2014 The Author.
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Oxford University Press
2014-07-09
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Subjects: | Aleppo pine, Fire ecology, Heritable plant traits, Heritability, Pinus halepensis, Serotiny, QST, FST, Selection, |
Online Access: | http://hdl.handle.net/10261/140661 http://dx.doi.org/10.13039/501100003329 |
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dig-cide-es-10261-1406612023-01-27T09:30:11Z Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait Hernández-Serrano, Ana Verdú, Miguel Santos del Blanco, Luis Climent, José González-Martínez, Santiago C. Pausas, J. G. Ministerio de Economía y Competitividad (España) Aleppo pine Fire ecology Heritable plant traits Heritability Pinus halepensis Serotiny QST FST Selection Background and Aims Although it is well known that fire acts as a selective pressure shaping plant phenotypes, there are no quantitative estimates of the heritability of any trait related to plant persistence under recurrent fires, such as serotiny. In this study, the heritability of serotiny in Pinus halepensis is calculated, and an evaluation is made as to whether fire has left a selection signature on the level of serotiny among populations by comparing the genetic divergence of serotiny with the expected divergence of neutral molecular markers (QST-FST comparison). Methods A common garden of P. halepensis was used, located in inland Spain and composed of 145 open pollinated families from 29 provenances covering the entire natural range of P. halepensis in the Iberian Peninsula and Balearic Islands. Narrow-sense heritability (h2) and quantitative genetic differentiation among populations for serotiny (QST) were estimated by means of an 'animal model' fitted by Bayesian inference. In order to determine whether genetic differentiation for serotiny is the result of differential natural selection, QST estimates for serotiny were compared with FST estimates obtained fromallozyme data. Finally, a testwas made of whether levels of serotiny in the different provenances were related to different fire regimes, using summer rainfall as a proxy for fire regime in each provenance. Key Results Serotiny showed a significant narrow-sense heritability (h2) of 0.20 (credible interval 0.09-0.40). Quantitative genetic differentiation among provenances for serotiny (QST = 0.44) was significantly higher than expected under a neutral process (FST = 0.12), suggesting adaptive differentiation. A significant negative relationship was found between the serotiny level of trees in the common garden and summer rainfall of their provenance sites. Conclusions Serotiny is a heritable trait in P. halepensis, and selection acts on it, giving rise to contrasting serotiny levels among populations depending on the fire regime, and supporting the role of fire in generating genetic divergence for adaptive traits. © 2014 The Author. This work was supported by the Spanish Ministry of Economy and Competitiveness through the following projects: VAMPIRO (CGL2008–05289-C02–01/02), SOBACO (CGL2011–29585- C02–01/02), TREVOL (CGL2012–39938-C02–01) and MITIGENFOR (RTA2011–00016). Peer Reviewed 2016-11-23T13:32:57Z 2016-11-23T13:32:57Z 2014-07-09 2016-11-23T13:32:58Z artículo http://purl.org/coar/resource_type/c_6501 issn: 1095-8290 Annals of Botany 114: 571-577 (2014) http://hdl.handle.net/10261/140661 10.1093/aob/mcu142 http://dx.doi.org/10.13039/501100003329 25008363 Postprint https://doi.org/10.1093/aob/mcu142 Sí none Oxford University Press |
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Aleppo pine Fire ecology Heritable plant traits Heritability Pinus halepensis Serotiny QST FST Selection Aleppo pine Fire ecology Heritable plant traits Heritability Pinus halepensis Serotiny QST FST Selection |
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Aleppo pine Fire ecology Heritable plant traits Heritability Pinus halepensis Serotiny QST FST Selection Aleppo pine Fire ecology Heritable plant traits Heritability Pinus halepensis Serotiny QST FST Selection Hernández-Serrano, Ana Verdú, Miguel Santos del Blanco, Luis Climent, José González-Martínez, Santiago C. Pausas, J. G. Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait |
description |
Background and Aims Although it is well known that fire acts as a selective pressure shaping plant phenotypes, there are no quantitative estimates of the heritability of any trait related to plant persistence under recurrent fires, such as serotiny. In this study, the heritability of serotiny in Pinus halepensis is calculated, and an evaluation is made as to whether fire has left a selection signature on the level of serotiny among populations by comparing the genetic divergence of serotiny with the expected divergence of neutral molecular markers (QST-FST comparison). Methods A common garden of P. halepensis was used, located in inland Spain and composed of 145 open pollinated families from 29 provenances covering the entire natural range of P. halepensis in the Iberian Peninsula and Balearic Islands. Narrow-sense heritability (h2) and quantitative genetic differentiation among populations for serotiny (QST) were estimated by means of an 'animal model' fitted by Bayesian inference. In order to determine whether genetic differentiation for serotiny is the result of differential natural selection, QST estimates for serotiny were compared with FST estimates obtained fromallozyme data. Finally, a testwas made of whether levels of serotiny in the different provenances were related to different fire regimes, using summer rainfall as a proxy for fire regime in each provenance. Key Results Serotiny showed a significant narrow-sense heritability (h2) of 0.20 (credible interval 0.09-0.40). Quantitative genetic differentiation among provenances for serotiny (QST = 0.44) was significantly higher than expected under a neutral process (FST = 0.12), suggesting adaptive differentiation. A significant negative relationship was found between the serotiny level of trees in the common garden and summer rainfall of their provenance sites. Conclusions Serotiny is a heritable trait in P. halepensis, and selection acts on it, giving rise to contrasting serotiny levels among populations depending on the fire regime, and supporting the role of fire in generating genetic divergence for adaptive traits. © 2014 The Author. |
author2 |
Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Hernández-Serrano, Ana Verdú, Miguel Santos del Blanco, Luis Climent, José González-Martínez, Santiago C. Pausas, J. G. |
format |
artículo |
topic_facet |
Aleppo pine Fire ecology Heritable plant traits Heritability Pinus halepensis Serotiny QST FST Selection |
author |
Hernández-Serrano, Ana Verdú, Miguel Santos del Blanco, Luis Climent, José González-Martínez, Santiago C. Pausas, J. G. |
author_sort |
Hernández-Serrano, Ana |
title |
Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait |
title_short |
Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait |
title_full |
Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait |
title_fullStr |
Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait |
title_full_unstemmed |
Heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait |
title_sort |
heritability and quantitative genetic divergence of serotiny, a fire-persistence plant trait |
publisher |
Oxford University Press |
publishDate |
2014-07-09 |
url |
http://hdl.handle.net/10261/140661 http://dx.doi.org/10.13039/501100003329 |
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