Genetic and developmental basis of cichlid trophic diversity

Albertson, R. Craig; Kocher, Thomas D.

doi:10.1038/sj.hdy.6800864

Cited by 151 publications

(144 citation statements)

References 80 publications

(88 reference statements)

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“…For example, most of the known functions for molecules such as Ihh and Bmp4 come from studies on both chick and mouse embryos (23,(26)(27)(28). In fact, similar craniofacial mechanisms have been observed in groups as disparate as fishes and birds (e.g., Bmp4 plays a role in deep/ strong jaw morphology in cichlids) (29). However, only functional experiments performed in Geospiza and Loxigilla will determine with certainty whether the genes examined here cause the species-specific morphologies.…”

Section: Resultsmentioning

confidence: 99%

Closely related bird species demonstrate flexibility between beak morphology and underlying developmental programs

Mallarino¹,

Campàs

Fritz

et al. 2012

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

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The astonishing variation in the shape and size of bird beaks reflects a wide range of dietary specializations that played an important role in avian diversification. Among Darwin's finches, ground finches (Geospiza spp.) have beaks that represent scaling variations of the same shape, which are generated by alterations in the signaling pathways that regulate growth of the two skeletal components of the beak: the prenasal cartilage (pnc) and the premaxillary bone (pmx). Whether this developmental mechanism is responsible for variation within groups of other closely related bird species, however, has remained unknown. Here, we report that the Caribbean bullfinches (Loxigilla spp.), which are closely related to Darwin's finches, have independently evolved beaks of a novel shape, different from Geospiza, but also varying from each other only in scaling. However, despite sharing the same beak shape, the signaling pathways and tissues patterning Loxigilla beaks differ among the three species. In Loxigilla noctis, as in Geospiza, the pnc develops first, shaped by Bmp4 and CaM signaling, followed by the development of the pmx, regulated by TGFβIIr, β-catenin, and Dkk3 signaling. In contrast, beak morphogenesis in Loxigilla violacea and Loxigilla portoricensis is generated almost exclusively by the pmx through a mechanism in which Ihh and Bmp4 synergize to promote expansion of bone tissue. Together, our results demonstrate high flexibility in the relationship between morphology and underlying developmental causes, where different developmental programs can generate identical shapes, and similar developmental programs can pattern different shapes. convergent evolution | craniofacial | morphogenesis

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Section: Resultsmentioning

confidence: 99%

Closely related bird species demonstrate flexibility between beak morphology and underlying developmental programs

Mallarino¹,

Campàs

Fritz

et al. 2012

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

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“…For example, cichlid fishes from Lakes Malawi and Tanganyika exhibit striking similarities in body shape, despite being more closely related to species from their own lake than to those from the other lake [17,33]. Such repeated parallel evolution is generally attributed to convergent selection.…”

Section: (A) Evolutionary Developmental Biologymentioning

confidence: 99%

“…Such repeated parallel evolution is generally attributed to convergent selection. However, inherent features of development may have channelled morphology along specific pathways, thereby facilitating the evolution of parallel forms in the two lakes [17,33]. If so, then the diversity of organismal form is only partly a consequence of natural selection-the particular evolutionary trajectories taken also depend on features of development.…”

Section: (A) Evolutionary Developmental Biologymentioning

confidence: 99%

The extended evolutionary synthesis: its structure, assumptions and predictions

et al. 2015

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Scientific activities take place within the structured sets of ideas and assumptions that define a field and its practices. The conceptual framework of evolutionary biology emerged with the Modern Synthesis in the early twentieth century and has since expanded into a highly successful research program to explore the processes of diversification and adaptation. Nonetheless, the ability of that framework satisfactorily to accommodate the rapid advances in developmental biology, genomics and ecology has been questioned. We review some of these arguments, focusing on literatures (evo-devo, developmental plasticity, inclusive inheritance and niche construction) whose implications for evolution can be interpreted in two ways-one that preserves the internal structure of contemporary evolutionary theory and one that points towards an alternative conceptual framework. The latter, which we label the 'extended evolutionary synthesis' (EES), retains the fundaments of evolutionary theory, but differs in its emphasis on the role of constructive processes in development and evolution, and reciprocal portrayals of causation. In the EES, developmental processes, operating through developmental bias, inclusive inheritance and niche construction, share responsibility for the direction and rate of evolution, the origin of character variation and organism-environment complementarity. We spell out the structure, core assumptions and novel predictions of the EES, and show how it can be deployed to stimulate and advance research in those fields that study or use evolutionary biology.

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“…PCR was used to amplify fragments from embryonic mRNA samples corresponding to the homeodomain-containing transcription factor dlx2a, and the etsdomain-containing factors fli1 and pea3. In both zebrafish and some cichlids, dlx2a is a marker of post-migratory pharyngeal NC (Yelick and Schilling, 2002;Albertson and Kocher, 2006), fli1 labels pharyngeal NC and mesodermally-derived vascular endothelia (Lawson and Weinstein, 2002), and pea3 marks pp (Miller et al, 2004).…”

Section: Pharyngeal Arch Segmentation In Nile Tilapia Embryosmentioning

confidence: 99%

Embryonic Development and Skeletogenesis of the Pharyngeal Jaw Apparatus in the Cichlid Nile Tilapia (Oreochromis niloticus)

Pabic

Stellwag

Scemama

2009

The Anatomical Record

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The evolution of a specialized pharyngeal jaw apparatus (PJA) has been argued to be the key evolutionary innovation that allowed the explosive adaptive radiation of cichlid fishes in East African lakes. Subsequent studies together with recent molecular phylogenies have shown that similar innovations evolved independently several times within the teleosts, which poses the questions: (1) how similar are the developmental mechanisms responsible for these changes in divergent taxa and (2) how did such complex features arise independently in evolution? A detailed knowledge of PJA development in cichlids and other teleosts is needed to address these questions. Here, we provide a detailed account of the development of the PJA in one species of cichlid, the Nile tilapia (Oreochromis niloticus), from the early segmentation and patterning of its embryonic precursors -pharyngeal arches 3 to 7 -to its ossification. We find that pharyngeal segmentation occurs sequentially from anterior to posterior during early segmentation stages through the mid-pharyngula period. We show a clear combinatorial code of Hox gene expression such that each posterior arch is defined by a distinctive Hox signature. Posterior arch chondrogenesis in tilapia is essentially complete by the end of the hatching period, and most elements become ossified over the next two days. Our results reveal that both the fusion of lower jaw bones and articulation between the neurocranium and upper jaws occur during post-embryonic development. Abstract end data should be: Anat Rec, 292:1780Rec, 292: -1800Rec, 292: , 2009. V V C 2009 Wiley-Liss, Inc.

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Genetic and developmental basis of cichlid trophic diversity

Cited by 151 publications

References 80 publications

Closely related bird species demonstrate flexibility between beak morphology and underlying developmental programs

Closely related bird species demonstrate flexibility between beak morphology and underlying developmental programs

The extended evolutionary synthesis: its structure, assumptions and predictions

Embryonic Development and Skeletogenesis of the Pharyngeal Jaw Apparatus in the Cichlid Nile Tilapia (Oreochromis niloticus)

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