A local dormancy cline is related to the seed maturation environment, population genetic composition and climate

Fernández-Pascual, Eduardo; Jíménez-Alfaro, Borja; Caujapé‐Castells, Juli; Jaén‐Molina, Ruth; Díaz, Tomás E.

doi:10.1093/aob/mct154

Cited by 72 publications

(76 citation statements)

References 66 publications

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“…(4) Many macrophytes appear to be widely distributed (Arber, 1920), but is seed biology variable in different populations in different regions? For example, Fernández-Pascual et al (2013) found that the cline in dormancy in Centaurium somedanum is related to the local climatic gradient and also corresponds to genetic differentiation among populations. (5) On a practical level, can simpler and cheaper techniques for keeping germplasm be developed?…”

Section: Concluding Remarks and Prospectsmentioning

confidence: 99%

Environmental opportunities and constraints in the reproduction and dispersal of aquatic plants

2014

Aquatic Botany

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Section: Concluding Remarks and Prospectsmentioning

confidence: 99%

Environmental opportunities and constraints in the reproduction and dispersal of aquatic plants

2014

Aquatic Botany

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“…The depth of primary dormancy that seeds exhibit upon dispersal depends on the environmental conditions during seed maturation, such as photoperiod or temperature (Gutterman, 1992(Gutterman, , 1994reviewed in Donohue, 2009;Fernandez-Pascual et al, 2013). For example, cool temperatures during seed maturation induce strong primary dormancy in Arabidopsis thaliana (Donohue et al, 2007(Donohue et al, , 2008Kendall et al, 2011;Kendall and Penfield, 2012;Huang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

DOG1-imposed dormancy mediates germination responses to temperature cues

Murphey

Kovach

Elnacash

et al. 2015

Environmental and Experimental Botany

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“…In many species, the timing of germination is controlled by seed dormancy, which is a heritable trait (30,31) that shows evidence of adaptive differentiation. Up to 90% of the plant species in temperate regions produce seeds that are dormant at maturation (31), and intraspecific genetic variation in seed dormancy has been documented along altitudinal (32,33) and latitudinal gradients (34)(35)(36). Moreover, sequence variation in the dormancy gene DELAY OF GERMINATION 1 (DOG1) in Arabidopsis thaliana indicates local adaptation (34), and the level of seed dormancy has been shown to be important for establishment success in novel environments (37).…”

mentioning

confidence: 99%

Early life stages contribute strongly to local adaptation in Arabidopsis thaliana

Postma

Ågren

2016

Proc. Natl. Acad. Sci. U.S.A.

119

171

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The magnitude and genetic basis of local adaptation is of fundamental interest in evolutionary biology. However, field experiments usually do not consider early life stages, and therefore may underestimate local adaptation and miss genetically based tradeoffs. We examined the contribution of differences in seedling establishment to adaptive differentiation and the genetic architecture of local adaptation using recombinant inbred lines (RIL) derived from a cross between two locally adapted populations (Italy and Sweden) of the annual plant Arabidopsis thaliana. We planted freshly matured, dormant seeds (>180 000) representing >200 RILs at the native field sites of the parental genotypes, estimated the strength of selection during different life stages, mapped quantitative trait loci (QTL) for fitness and its components, and quantified selection on seed dormancy. We found that selection during the seedling establishment phase contributed strongly to the fitness advantage of the local genotype at both sites. With one exception, local alleles of the eight distinct establishment QTL were favored. The major QTL for establishment and total fitness showed evidence of a fitness tradeoff and was located in the same region as the major seed dormancy QTL and the dormancy gene DELAY OF GERMINATION 1 (DOG1). RIL seed dormancy could explain variation in seedling establishment and fitness across the life cycle. Our results demonstrate that genetically based differences in traits affecting performance during early life stages can contribute strongly to adaptive differentiation and genetic tradeoffs, and should be considered for a full understanding of the ecology and genetics of local adaptation.I dentifying the ecological and genetic mechanisms underlying local adaptation, defined as the local genotype outperforming nonlocal genotypes (1), is a central problem in evolutionary biology. Local adaptation is common in both plant and animal species (2-5), promotes the maintenance of genetic variation (6, 7), and is a key component of models of speciation (8, 9). However, the relative importance of traits contributing to adaptive differentiation and their underlying genetic architecture remain poorly known (1,7,10,11). One key question is whether local adaptation results from genetic tradeoffs (antagonistic pleiotropy) in which locally favored alleles reduce fitness elsewhere or is caused by alleles that are conditionally neutral (favored in the home environment but selectively neutral in other environments). Empirical studies have rarely detected genetic tradeoffs (12)(13)(14), but these studies typically include only part of the life cycle (3,5,15), possibly resulting in a systematic underestimation of the magnitude of adaptive differentiation and of the occurrence of genetically based tradeoffs.Early life stages can be expected to play a prominent role in local adaptation. First, selection can be particularly severe during the first part of the life cycle when organisms are vulnerable and suffer from high mortality rates (15)(16)(...

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A local dormancy cline is related to the seed maturation environment, population genetic composition and climate

Cited by 72 publications

References 66 publications

Environmental opportunities and constraints in the reproduction and dispersal of aquatic plants

Environmental opportunities and constraints in the reproduction and dispersal of aquatic plants

DOG1-imposed dormancy mediates germination responses to temperature cues

Early life stages contribute strongly to local adaptation in Arabidopsis thaliana

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