Chromosomal diversity in tropical reef fishes is related to body size and depth range

Martínez, P.; Zurano, Juan Pablo; Amado, Talita Ferreira; Penone, Caterina; Betancur‐R, Ricardo; Bidau, Claudio J.; Jacobina, Uedson Pereira

doi:10.1016/j.ympev.2015.07.002

Cited by 24 publications

(31 citation statements)

References 29 publications

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“…In reef fishes (Martinez et al . ) and estrildid finches (Hooper & Price ), chromosomal rearrangements fix faster in lineages with higher dispersal potential and gene flow, which is consistent with the prediction that gene flow favours fixation of chromosomal rearrangements that create and maintain associations among locally adapted loci (Kirkpatrick & Barton ). The reduction of recombination associated with inversions is what links inversions to adaptation with gene flow (Fig.…”

Section: Maintenance Of Adaptationsupporting

confidence: 82%

Genomics of local adaptation with gene flow

2016

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Gene flow is a fundamental evolutionary force in adaptation that is especially important to understand as humans are rapidly changing both the natural environment and natural levels of gene flow. Theory proposes a multifaceted role for gene flow in adaptation, but it focuses mainly on the disruptive effect that gene flow has on adaptation when selection is not strong enough to prevent the loss of locally adapted alleles. The role of gene flow in adaptation is now better understood due to the recent development of both genomic models of adaptive evolution and genomic techniques, which both point to the importance of genetic architecture in the origin and maintenance of adaptation with gene flow. In this review, we discuss three main topics on the genomics of adaptation with gene flow. First, we investigate selection on migration and gene flow. Second, we discuss the three potential sources of adaptive variation in relation to the role of gene flow in the origin of adaptation. Third, we explain how local adaptation is maintained despite gene flow: we provide a synthesis of recent genomic models of adaptation, discuss the genomic mechanisms and review empirical studies on the genomics of adaptation with gene flow. Despite predictions on the disruptive effect of gene flow in adaptation, an increasing number of studies show that gene flow can promote adaptation, that local adaptations can be maintained despite high gene flow, and that genetic architecture plays a fundamental role in the origin and maintenance of local adaptation with gene flow.

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Section: Maintenance Of Adaptationsupporting

confidence: 82%

Genomics of local adaptation with gene flow

2016

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“…The striking difference in rates of chromosome number evolution between taxa with matched and mismatched karyotypes suggests that any attempts to identify the role of alternative forces like population structure or selection (Bengtsson ; Petitpierre ; Martinez et al. ; Ross et al. ; Martinez et al.…”

Section: Discussionmentioning

confidence: 99%

Meiotic drive shapes rates of karyotype evolution in mammals

et al. 2019

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Chromosome number is perhaps the most basic characteristic of a genome, yet generalizations that can explain the evolution of this trait across large clades have remained elusive. Using karyotype data from over 1000 mammals, we developed and applied a phylogenetic model of chromosome evolution that links chromosome number changes with karyotype morphology. Using our model, we infer that rates of chromosome number evolution are significantly lower in species with karyotypes that consist of either all bibrachial or all monobrachial chromosomes than in species with a mix of both types of morphologies. We suggest that species with homogeneous karyotypes may represent cases where meiotic drive acts to stabilize the karyotype, favoring the chromosome morphologies already present in the genome. In contrast, rapid bouts of chromosome number evolution in taxa with mixed karyotypes may indicate that a switch in the polarity of female meiotic drive favors changes in chromosome number. We do not find any evidence that karyotype morphology affects rates of speciation or extinction. Furthermore, we document that switches in meiotic drive polarity are likely common and have occurred in most major clades of mammals, and that rapid remodeling of karyotypes may be more common than once thought.

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“…To consider intraspecific variation, we used the approach of Martinez et al . (): we randomly selected a value within the standard error of mean (‘trait replicates’). We randomized trait values 100 times leading to 10 000 models (100 tree replicas × 100 trait replicas).…”

Section: Methodsmentioning

confidence: 99%

“…We generated 100 phylogenetic trees by randomizing the species with phylogenetic uncertainty and they were used in 100 PGLS analyses to account for phylogenetic uncertainties (Rangel et al, 2015). To consider intraspecific variation, we used the approach of Martinez et al (2015): we randomly selected a value within the standard error of mean ('trait replicates'). We randomized trait values 100 times leading to 10 000 models (100 tree replicas 9 100 trait replicas).…”

Section: Methodsmentioning

confidence: 99%

Sexual size dimorphism and Rensch's rule in Canidae

Bidau

Martínez

2016

Biol. J. Linn. Soc.

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The size variation between males and females of a species is a phenomenon known as sexual size dimorphism (SSD). The observed patterns of variation in SSD among species has led to the formulation of Rensch's rule, which establishes that, in species showing a male size bias, SSD increases with an increase in the body size of the species. However, for species in which there is a female size bias, the SSD would decrease when the body size of the species increases. In the present study, we examined the variation in body size and SSD of 33 species of canids from estimates of body mass and body length. We studied its relationship with life‐history characteristics and tested Rensch's rule using phylogenetic generalized least squares and phylogenetic reduced major axis regressions, respectively. We observed the existence of correlation between body mass and body length, although the SSDs from these estimators are uncorrelated. SSD did not show the pattern predicted by Rensch's rule. SSD also did not show any correlation with life‐history traits. It is likely that the low SSD observed in canids is related to the monogamy observed in the family, which is a rare situation in mammals.

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Chromosomal diversity in tropical reef fishes is related to body size and depth range

Cited by 24 publications

References 29 publications

Genomics of local adaptation with gene flow

Genomics of local adaptation with gene flow

Meiotic drive shapes rates of karyotype evolution in mammals

Sexual size dimorphism and Rensch's rule in Canidae

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