Local Scale Genetic Diversity and its Role in Coping with Changing Climate

Cortés, Andrés J.

doi:10.5772/67166

Cited by 9 publications

(8 citation statements)

References 82 publications

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“…Moreover, investigations of genetic structure in fine-scale environments are of utter importance for planning conservation of heterogeneous habitats, especially when they are affected by climatic changes and by other, more direct human impact (Cortés, 2017). Thus, the results expected from our study may provide a helpful example for the general problem of conservation in case of narrowly distributed aquatic endemic biota.…”

Section: Introductionmentioning

confidence: 72%

“…Thus, the results expected from our study may provide a helpful example for the general problem of conservation in case of narrowly distributed aquatic endemic biota. Moreover, investigations of genetic structure in fine-scale environments are of utter importance for planning conservation of heterogeneous habitats, especially when they are affected by climatic changes and by other, more direct human impact (Cortés, 2017). Narrow-ranged species inhabiting such localities not only significantly enrich local-scale diversity; also, by preferring particular environmental conditions, they may mirror the loss of sensitive habitat features (Cushman, 2006;Mehrabi, Slade, Solis, & Mann, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Long‐term within‐basin isolation patterns, different conservation units, and interspecific mitochondrial DNA introgression in an amphipod endemic to the ancient Lake Skadar system, Balkan Peninsula

et al. 2019

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1. Investigation of biodiversity, including genetic diversity within species, is crucial for rational planning of nature conservation and species protection. Endemics or narrow-ranged taxa, sensitive to alteration of physical and chemical conditions, may serve as local bioindicators. 2.Homoeogammarus scutarensis is an endemic, cold-adapted amphipod crustacean, inhabiting fragmented spring habitats, within a relatively small area of the Lake Skadar basin. The basin is recently under heavy anthropogenic influence leading to habitat deterioration.3. Genetic diversity within H. scutarensis was investigated using the mitochondrial cytochrome c oxidase subunit I and the nuclear 28S ribosomal RNA markers.Genetic diversity within the mitochondrial (mt)DNA appeared to be surprisingly high as for the limited spatial scale. The history of within-species divergence dates back at least to the Pliocene. 4. A case of interspecific mtDNA introgression from the endemic H. scutarensis to the widespread and partly sympatric Homoeogammarus thoni was observed in one of the studied populations. Demographic analysis showed that the demography of H. scutarensis population hasbeen stable, without evidence of expansion. Thus, we believe that H. scutarensis, responsive to environmental changes, is a proper model mirroring the conditions in sensitive habitats of the Lake Skadar basin. To protect ongoing evolutionary processes, the conservation measures for this species should take into account the complex fine-scale lineage endemism patterns. This case study may also provide a hint for planning conservation strategies in other geologically old spring systems.6. Most of the localities where H. scutarensis occurs provide refugia for divergent mtDNA lineages, suggesting prolonged isolation between sites and independent evolutionary histories. We conclude that H. scutarensis is composed of two or three conservation units. One of them occupies the headwaters of the Crnojevića River and spring in its valley. The other is widespread throughout the sub-lacustrine We would like to thank

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Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Long‐term within‐basin isolation patterns, different conservation units, and interspecific mitochondrial DNA introgression in an amphipod endemic to the ancient Lake Skadar system, Balkan Peninsula

et al. 2019

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“…However, these surveys have not explicitly addressed the colonization of the Andes by linages coming from Central America and the corresponding change in selection pressures associated with different altitudes, latitudes, and microenvironments. Topographically complex mountainous systems, such as the Andes, harbor an impressive heterogeneity of climates at a small scale [40][41][42][43]. The ridges and valleys constitute physical barriers that limit dispersal and cause local variation in rainfall, resulting in genetic isolation and variation in habitats.…”

Section: Signatures Of Shared Within-species Parallel Divergencementioning

confidence: 99%

Bean Genome Diversity Reveals the Genomic Consequences of Speciation, Adaptation, and Domestication

Cortés¹,

Hurtado²,

Blair³

et al. 2019

Genetic Diversity in Plant Species - Characterization and Conservation

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Here we review whether genomic islands of speciation are repeatedly more prone to harbor within-species differentiation due to genomic features, such as suppressed recombination, smaller effective population size, and increased drift, across repeated hierarchically nested levels of divergence. Our discussion focuses on two species of Phaseolus beans with strong genepool and population substructure and multiple independent domestications each. We overview regions of species-associated divergence, as well as divergence recovered in withinspecies between-genepool comparisons and in within-genepool wild-cultivated comparisons. We discuss whether regions with overall high relative differentiation coincide with sections of low SNP density and with between-species pericentric inversions, since these convergences would suggest that shared variants are being recurrently fixed at replicated comparisons, and in a similar manner across different hierarchically nested levels of divergence, likely as the result of genomic features that make certain regions more prone to accumulate islands of speciation as well as within-species divergence. We conclude that neighboring signatures of speciation, adaptation, and domestication in Phaseolus beans seem to be influenced by ubiquitous genomic constrains, which may continue shaping, fortuitously, genomic differentiation at various other scales of divergence. This pattern also suggests that genomic regions important for adaptation may frequently be sheltered from recombination.

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“…The same dataset and software can be used to perform association analyses between the SNP markers and bioclimatic-based indexes (e.g. [12,38,39]).…”

Section: Using Genome-environment Association Scans To Identify Loci mentioning

confidence: 99%

Lessons from Common Bean on How Wild Relatives and Landraces Can Make Tropical Crops More Resistant to Climate Change

Cortés¹,

Blair²

2018

Rediscovery of Landraces as a Resource for the Future

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Warming is expected to lead to drier environments worldwide, especially in the tropics, and it is unclear how crops will react. Drought tolerance often varies at small spatial scales in natural ecosystems, where many of the wild relatives and landraces of the main crops have been collected. Through a series of examples, we will show that collections of wild relatives and landraces, many of those deposited at germplasm banks, may represent this desired source of variation, as they are genetically diverse and phenotypically variable. For instance, using a spectrum of genotyping and phenotyping approaches, we have studied the extent of genetic and phenotypic diversity for drought tolerance in wild and landraces of common bean (Phaseolus vulgaris L.) and compared it with the one available at cultivated varieties. Not surprisingly, most of the naturally available variation to cope with drought in the natural environments was lost through domestication and recent plant breeding. It is therefore imperative to exploit the reservoir of wild relatives and landraces to make crops more tolerant. Yet, it remains to be seen if the rate at which this naturally available variation can be incorporated into the cultivated varieties may keep pace with the rate of climate change.

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Local Scale Genetic Diversity and its Role in Coping with Changing Climate

Cited by 9 publications

References 82 publications

Long‐term within‐basin isolation patterns, different conservation units, and interspecific mitochondrial DNA introgression in an amphipod endemic to the ancient Lake Skadar system, Balkan Peninsula

Long‐term within‐basin isolation patterns, different conservation units, and interspecific mitochondrial DNA introgression in an amphipod endemic to the ancient Lake Skadar system, Balkan Peninsula

Bean Genome Diversity Reveals the Genomic Consequences of Speciation, Adaptation, and Domestication

Lessons from Common Bean on How Wild Relatives and Landraces Can Make Tropical Crops More Resistant to Climate Change

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