Adaptive evolution of Mediterranean pines

Grivet, Delphine; Climent, José; Zabal‐Aguirre, Mario; Neale, David B.; Vendramin, Giovanni G.; González‐Martínez, Santiago C.

doi:10.1016/j.ympev.2013.03.032

Cited by 49 publications

(47 citation statements)

References 70 publications

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“…Biological, genetic and ecological skills are fundamental to contribute to these studies, to enforce and validate statistical models and to combine different approaches. Species-specific analysis like genetic diversity, dendrochronology and water-stress resistance could be added to study the phenotypic plasticity of the species (Grivet et al, 2013). In addition, the genetic information about species and their local adaptation must be carefully considered and all the efforts made on local studies, such as those on MaP populations, could have a global impact on the development of a common scientific knowledge base about adaptive processes of forest species.…”

Section: Discussionmentioning

confidence: 99%

Future scenarios and conservation strategies for a rear-edge marginal population of Pinus nigra Arnold in Italian central Apennines

Marchi¹,

Nocentini²,

Ducci³

2016

For. syst.

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Aim of the study: To forecast the effects of climate change on the spatial distribution of Black pine of Villetta Barrea in its natural range and to define a possible conservation strategy for the species Area of study: A rear-edge marginal population of Pinus nigra spp. nigra in Abruzzo region, central Italian Apennines Matherials and Methods: For its adaptive and genetic traits this population is considered endemic of the Italian peninsula and represents a rear-edge marginal population of nigra subspecies. The spatial distribution of the tree in the administrative Region (Abruzzo) was used to define the ecological traits while three modelling techniques (GLM, GAM, Random Forest) were used to build a Species distribution model according to two climatic scenarios.Main results: The marginal population's range was predicted to shift at higher elevations as consequence of climatic adaptation. Many zones, represented by the higher part of the mountains surrounding the study area (currently bare and inhospitable for trees), were identified as suitable in future for the species. However, in the case of a rapid climate change, this marginal population may not be able to move as fast as necessary. An in-situ adaptive management integrated with an assisted migration protocol might be considered to favour natural regeneration and improve the richness and variability of the genetic pool.Research highlights: Most of the genetic richness is held in small populations at the borders of natural distribution of forest species. Monitoring this MAP could be useful to understand the adaptive processes of the species and could support the future management of many other within-core populations.

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Section: Discussionmentioning

confidence: 99%

Future scenarios and conservation strategies for a rear-edge marginal population of Pinus nigra Arnold in Italian central Apennines

Marchi¹,

Nocentini²,

Ducci³

2016

For. syst.

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“…Understanding of the mechanisms of plant adaptation has been advanced through comparative studies of species differing in demographic history (Slotte, Foxe, Hazzouri, & Wright, ), effective population size (Gossmann, Keightley, & Eyre‐Walker, ; Strasburg et al., ), genetic structure among populations (Wright & Andolfatto, ), ecological conditions (Tellier et al., ) or phylogenetic relationships (Eckert, Bower, et al. ; Grivet et al., ; Palmé, Pyhäjärvi, Wachowiak, & Savolainen, ). For long‐lived species such as most forest trees, unravelling adaptive processes is challenging, as during their long life cycle, individuals experience different selective pressures that accumulate over time.…”

Section: Introductionmentioning

confidence: 99%

High rate of adaptive evolution in two widespread European pines

et al. 2017

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Comparing related organisms with differing ecological requirements and evolutionary histories can shed light on the mechanisms and drivers underlying genetic adaptation. Here, by examining a common set of hundreds of loci, we compare patterns of nucleotide diversity and molecular adaptation of two European conifers (Scots pine and maritime pine) living in contrasted environments and characterized by distinct population genetic structure (low and clinal in Scots pine, high and ecotypic in maritime pine) and demographic histories. We found higher nucleotide diversity in Scots pine than in maritime pine, whereas rates of new adaptive substitutions (ω ), as estimated from the distribution of fitness effects, were similar across species and among the highest found in plants. Sample size and population genetic structure did not appear to have resulted in significant bias in estimates of ω . Moreover, population contraction-expansion dynamics for each species did not affect differentially the rate of adaptive substitution in these two pines. Several methodological and biological factors may underlie the unusually high rate of adaptive evolution of Scots pine and maritime pine. By providing two new case studies with contrasting evolutionary histories, we contribute to disentangling the multiple factors potentially affecting adaptive evolution in natural plant populations.

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“…Thus, the divergence time between P. canariensis and its close sister species can be regarded as a lower bound for the HGT event. Previous studies suggest that P. canariensis is closely related to the Himalayan chir pine Pinus roxburghii (Klaus and Ehrendorfer, 1989;Parks et al, 2012;Grivet et al, 2013). On the basis of cpDNA dating, the divergence time between P. canariensis and P. roxburghii was 4.4 MYA (95% interval 7.3 − 1.6 MYA; Figure 3; Supplementary Figure S1 and Supplementary Table S4).…”

Section: Pinus Canariensis (Angiosperm-type)mentioning

confidence: 84%

“…Thus, we cannot rule out the possibility that the HGT occurred in the common ancestor of P. canariensis and P. roxburghii and then the foreign copy of nad5-1 was lost from P. roxburghii owing to the capture of another mtDNA. Pinus canariensis and P. roxburghii diverged from their closest relative Pinus pinea (Parks et al, 2012;Grivet et al, 2013) Table S4). This pushes the lower bound of the time of HGT slightly earlier.…”

Section: Pinus Canariensis (Angiosperm-type)mentioning

confidence: 99%

Horizontal gene transfer from a flowering plant to the insular pine Pinus canariensis (Chr. Sm. Ex DC in Buch)

Wang¹,

Climent²,

Wang³

2015

Heredity

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Horizontal gene transfer (HGT) is viewed as very common in the plant mitochondrial (mt) genome, but, to date, only one case of HGT has been found in gymnosperms. Here we report a new case of HGT, in which a mt nad5-1 fragment was transferred from an angiosperm to Pinus canariensis. Quantitative assay and sequence analyses showed that the foreign nad5-1 is located in the mt genome of P. canariensis and is nonfunctional. An extensive survey in the genus Pinus revealed that the angiosperm-derived nad5-1 is restricted to P. canariensis and present across the species' range. Molecular dating based on chloroplast DNA suggested that the HGT event occurred in the late Miocene after P. canariensis split from its closest relatives, and that the foreign copy became fixed in P. canariensis owing to drift during its colonization of the Canary Islands. The mechanism of this HGT is unclear but it was probably achieved through either direct cell-cell contact or external vectors. Our discovery provides evidence for an important role of HGT in plant mt genome evolution.

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Adaptive evolution of Mediterranean pines

Cited by 49 publications

References 70 publications

Future scenarios and conservation strategies for a rear-edge marginal population of Pinus nigra Arnold in Italian central Apennines

Future scenarios and conservation strategies for a rear-edge marginal population of Pinus nigra Arnold in Italian central Apennines

High rate of adaptive evolution in two widespread European pines

Horizontal gene transfer from a flowering plant to the insular pine Pinus canariensis (Chr. Sm. Ex DC in Buch)

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