Genetic variation for needle traits in Scots pine (Pinus sylvestris L.)

Donnelly, Kevin; Cavers, Stephen; Cottrell, Joan; Ennos, Richard A.

doi:10.1007/s11295-016-1000-4

Cited by 23 publications

(31 citation statements)

References 39 publications

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“…As phenological marks, needles are directly exposed to the environment's physical factors, such as altitude, air temperature, atmospheric pressure, precipitation, and wind velocity (Friend & Woodward, 1990;Körner, 2007;Tiwari et al, 2013). They are also responsible for photosynthesis, carbon assimilation, and exchange of gas and water, and they may vary in overall dimensions, as well as in details of key anatomical characteristics important in processes of adaptation (Donnelly et al, 2016). Cone formation is also known to be variable, depending greatly upon climatic factors (Ovington, 1957).…”

Section: Introductionmentioning

confidence: 99%

Morphological and anatomical differentiation in peripheral Pinus sylvestris L. populations from the Carpathian region

Köbölkuti¹,

Tóth²,

Ladányi³

et al. 2017

Dendrobiology

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Carpathian Scots pine populations having peripheral distribution within the species' range are often sustained in specific types of habitats, such as peat bogs and rocky surfaces or lime consisting sandy substrates. Due to their long time adaptive processes, which involve genotypes that can be preadapted to a given selection pressure, historically isolated populations are subjects of particular interest in studies of in situ adaptation. In this study we focus on detecting the level of phenotypic differentiation based on cone morphology and needle anatomy in marginal populations of Pinus sylvestris L. in the Pannonian Basin and the Carpathian Mountains. Six cone morphological and eight needle anatomical characters were measured and four cone morphological and four needle anatomical ratios were calculated. Our results in concordance with paleobotanical data indicate a common origin of the populations from the Northern Carpathians and the Pannonian Basin. High levels of variation were observed in cone morphology. Discriminant function analysis based on the eight cone characteristics revealed clearly discernible groups of populations and indicated significant differentiation among populations growing in peat bogs and on rocky substrates. Significant differences among populations from different habitats were also revealed by comparing needle anatomical variables. The phenotypic differentiation by habitat type based on the measured characters might be evaluated as a sign of local adaptation with detectable phenotypic patterns.

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Section: Introductionmentioning

confidence: 99%

Morphological and anatomical differentiation in peripheral Pinus sylvestris L. populations from the Carpathian region

Köbölkuti¹,

Tóth²,

Ladányi³

et al. 2017

Dendrobiology

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“…Scots pine is wind‐pollinated, enabling reproduction across large distances; however, in Scotland, it has been shown that asynchrony in flowering phenology may serve to inhibit gene flow among populations (Whittet, Cavers, Cottrell, Rosique‐Esplugas, & Ennos, ). Related work on needle anatomical traits has shown differentiation for stomatal band and resin canal densities, consistent with adaptation to the same longitudinal rainfall gradient that generates adaptive differences in flood tolerance in P. sylvestris in Scotland, is also modest (Donnelly et al., ).…”

Section: Discussionmentioning

confidence: 80%

“…This systematic evaluation of fixed‐effects combinations is similar to that described by Burnham and Anderson () and Grueber, Nakagawa, Laws, and Jamieson (). Rainfall and longitude at site of origin were included as covariates, the latter having previously shown potential to be a more effective predictor of trait variation in Scotland than raw meteorological data (Donnelly et al., ). The best models were then refitted using restricted maximum likelihood.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, differences in underlying geology generate soils that are generally more freely draining in the east than in the west (Mason, Hampson, & Edwards, 2004). Previous work has demonstrated genetic differences among these populations for cold tolerance, phenology, needle characters, and pathogen tolerance that are consistent with adaptation to the environmental variation experienced across Scotland (Donnelly, Cavers, Cottrell, & Ennos, 2016;Perry et al, 2016;Salmela, Cavers, Cottrell, Iason, & Ennos, 2013;Salmela et al, 2011). Here, we investigate whether there is evidence for local adaptation for tolerance of waterlogging among present-day Caledonian pine populations, and assess the extent of cryptic genetic variation for the trait under flooded conditions.…”

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confidence: 89%

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Cryptic genetic variation and adaptation to waterlogging in Caledonian Scots pine, Pinus sylvestris L.

Donnelly

Cavers

Cottrell

et al. 2018

Ecology and Evolution

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Local adaptation occurs as the result of differential selection among populations. Observations made under common environmental conditions may reveal phenotypic differences between populations with an underlying genetic basis; however, exposure to a contrasting novel environment can trigger release of otherwise unobservable (cryptic) genetic variation. We conducted a waterlogging experiment on a common garden trial of Scots pine, Pinus sylvestris (L.), saplings originating from across a steep rainfall gradient in Scotland. A flood treatment was maintained for approximately 1 year; physiological responses were gauged periodically in terms of photochemical capacity as measured via chlorophyll fluorescence. During the treatment, flooded individuals experienced a reduction in photochemical capacity, F v /F m, this reduction being greater for material originating from drier, eastern sites. Phenotypic variance was increased under flooding, and this increase was notably smaller in saplings originating from western sites where precipitation is substantially greater and waterlogging is more common. We conclude that local adaptation has occurred with respect to waterlogging tolerance and that, under the flooding treatment, the greater increase in variability observed in populations originating from drier sites is likely to reflect a relative absence of past selection. In view of a changing climate, we note that comparatively maladapted populations may possess considerable adaptive potential, due to cryptic genetic variation, that should not be overlooked.

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“…Variation in needle characteristics is also in congruence with Fowler and Morris (1977) in Pinus resinosa, Sagwal (1978) in P. roxburghii, Rajendra (2009) in P. merkusii, Nikolic et al (2013) in Picea omorika, Nikolic et al (2014) in Pinus heldreichii, Boratynska et al (2014) in P. mugo, Nikolic et al (2015) in P. peuce and Donnelly et al (2016) in P. sylvestris and Huang et al (2016) in Pinus yunnanensi.…”

Section: Variability Estimatesmentioning

confidence: 71%

Variability studies for needle and wood traits of different half sib progenies of Pinus roxburghii Sargent

Bhat

Singh²,

Sankhyan

et al. 2016

Physiol Mol Biol Plants

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Genetic variability studies for needle and wood traits were carried out for the different half sib progenies of Chir pine, raised in 1985 at the main campus of University. There existed a significant variation for these traits among the different half sib progenies, viz., needle length (18.1-24.6 cm), needle thickness (0.53-0.71 mm), number of stomata per mm of a row (7.3-12.0), specific gravity of wood (0.36-0.46), tracheid length (1.51-1.85) and moisture content of wood (47.76-58.81). This variability was found under genetic control, as all these progenies are growing under same environment, and are of same age. Traits having high heritability and genetic gain like, needle thickness, wood specific gravity, tracheid length and others, indicate high genetic control. This variability can be exploited in tree improvement programs through selection and breeding approaches for development of advanced generations. Correlation studies for different traits at genotypic and phenotypic levels provided the basic knowledge of association to chalk out efficient breeding strategy for higher productivity through indirect selection.

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Genetic variation for needle traits in Scots pine (Pinus sylvestris L.)

Abstract: 10The remnants of the Caledonian Native Pinewood are distributed across a relatively narrow

Cited by 23 publications

References 39 publications

Morphological and anatomical differentiation in peripheral Pinus sylvestris L. populations from the Carpathian region

Morphological and anatomical differentiation in peripheral Pinus sylvestris L. populations from the Carpathian region

Cryptic genetic variation and adaptation to waterlogging in Caledonian Scots pine, Pinus sylvestris L.

Variability studies for needle and wood traits of different half sib progenies of Pinus roxburghii Sargent

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