Evo-Devo of the Fin-to-Limb Transition

Tanaka, Yoshitaka; Kudoh, Hidehiro; Abe, Gembu; Yonei‐Tamura, Sayuri; Tamura, Koji

doi:10.1007/978-3-319-32979-6_193

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…They also share a bud‐like morphology with an epidermal signaling center, the apical ectodermal ridge (AER), at the early stages. They then undergo their own lineage‐specific developmental processes to create the final traits (reviewed by Paço & Freitas, 2017; Tanaka, 2018; Tanaka et al, 2021). The AER, for example, is transformed into the fin fold in the fins, but the AER is maintained in the limbs.…”

Section: Introductionmentioning

confidence: 99%

Genomic screening of fish‐specific genes in gnathostomes and their functions in fin development

Kudoh,

Yonei‐Tamura,

Abe

et al. 2024

Dev Growth Differ

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In this study, we comprehensively searched for fish‐specific genes in gnathostomes that contribute to development of the fin, a fish‐specific trait. Many previous reports suggested that animal group‐specific genes are often important for group‐specific traits. Clarifying the roles of fish‐specific genes in fin development of gnathostomes, for example, can help elucidate the mechanisms underlying the formation of this trait. We first identified 91 fish‐specific genes in gnathostomes by comparing the gene repertoire in 16 fish and 35 tetrapod species. RNA‐seq analysis narrowed down the 91 candidates to 33 genes that were expressed in the developing pectoral fin. We analyzed the functions of approximately half of the candidate genes by loss‐of‐function analysis in zebrafish. We found that some of the fish‐specific and fin development‐related genes, including fgf24 and and1/and2, play roles in fin development. In particular, the newly identified fish‐specific gene qkia is expressed in the developing fin muscle and contributes to muscle morphogenesis in the pectoral fin as well as body trunk. These results indicate that the strategy of identifying animal group‐specific genes is functional and useful. The methods applied here could be used in future studies to identify trait‐associated genes in other animal groups.

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Section: Introductionmentioning

confidence: 99%

Genomic screening of fish‐specific genes in gnathostomes and their functions in fin development

Kudoh,

Yonei‐Tamura,

Abe

et al. 2024

Dev Growth Differ

Self Cite

View full text Add to dashboard Cite

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Evolution and Development

Love

2024

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The intersection of development and evolution has always harbored conceptual issues, but many of these are on display in contemporary evolutionary developmental biology (evo-devo). These issues include: (1) the precise constitution of evo-devo, with its focus on both the evolution of development and the developmental basis of evolution, and how it fits within evolutionary theory; (2) the nature of evo-devo model systems that comprise the material of comparative and experimental research; (3) the puzzle of how to understand the widely used notion of 'conserved mechanisms'; (4) the definition of evolutionary novelties and expectations for how to explain them; and (5) the demand of interdisciplinary collaboration that derives from investigating complex phenomena at key moments in the history of life, such as the fin-limb transition. This Element treats these conceptual issues with close attention to both empirical detail and scientific practice to offer new perspectives on evolution and development. This title is also available as Open Access on Cambridge Core.

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The Chromosome-Scale Genome of Chitala ornata Illuminates the Evolution of Early Teleosts

Yuan,

Song,

Zhang

et al. 2024

Biology

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Teleosts are the most prolific vertebrates, occupying the vast majority of aquatic environments, and their pectoral fins have undergone remarkable physiological transformations throughout their evolution. Studying early teleost fishes, such as those belonging to the Osteoglossiformes order, could offer crucial insights into the adaptive evolution of pectoral fins within this group. In this study, we have assembled a chromosomal-level genome for the Clown featherback (Chitala ornata), achieving the highest quality genome assembly for Osteoglossiformes to date, with a contig N50 of 32.78 Mb and a scaffold N50 of 40.73 Mb. By combining phylogenetic analysis, we determined that the Clown featherback diverged approximately 202 to 203 million years ago (Ma), aligning with continental separation events. Our analysis revealed the intriguing discovery that a unique deletion of regulatory elements is adjacent to the Gli3 gene, specifically in teleosts. This deletion might be tied to the specialized adaptation of their pectoral fins. Furthermore, our findings indicate that specific contractions and expansions of transposable elements (TEs) in teleosts, including the Clown featherback, could be connected to their adaptive evolution. In essence, this study not only provides a high-quality genomic resource for Osteoglossiformes but also sheds light on the evolutionary trajectory of early teleosts.

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Evo-Devo of the Fin-to-Limb Transition

Cited by 3 publications

References 32 publications

Genomic screening of fish‐specific genes in gnathostomes and their functions in fin development

Genomic screening of fish‐specific genes in gnathostomes and their functions in fin development

Evolution and Development

The Chromosome-Scale Genome of Chitala ornata Illuminates the Evolution of Early Teleosts

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