Transcriptomics of two evolutionary novelties : how to make a sperm-transfer organ out of an anal fin and a sexually selected "word" out of a caudal fin

Kang, Ji Hyoun; Manousaki, Tereza; Franchini, Paolo; Kneitz, Susanne; Schartl, Manfred; Meyer, Axel

Transcriptomics of two evolutionary novelties : how to make a sperm-transfer organ out of an anal fin and a sexually selected "word" out of a caudal fin

Dateien

Kang_0-285462.pdfGröße: 529.55 KBDownloads: 318

Datum

2015

Autor:innen

Kang, Ji Hyoun

Manousaki, Tereza

Franchini, Paolo

Kneitz, Susanne

Schartl, Manfred

Meyer, Axel

Open Access-Veröffentlichung

Open Access Gold

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Ecology and Evolution. 2015, 5(4), pp. 848-864. eISSN 2045-7758. Available under: doi: 10.1002/ece3.1390

Zusammenfassung

Swords are exaggerated male ornaments of swordtail fishes that have been of great interest to evolutionary biologists ever since Darwin described them in the Descent of Man (1871). They are a novel sexually selected trait derived from modified ventral caudal fin rays and are only found in the genus Xiphophorus. Another phylogenetically more widespread and older male trait is the gonopodium, an intromittent organ found in all poeciliid fishes, that is derived from a modified anal fin. Despite many evolutionary and behavioral studies on both traits, little is known so far about the molecular mechanisms underlying their development. By investigating transcriptomic changes (utilizing a RNA-Seq approach) in response to testosterone treatment in the swordtail fish, Xiphophorus hellerii, we aimed to better understand the architecture of the gene regulatory networks underpinning the development of these two evolutionary novelties. Large numbers of genes with tissue-specific expression patterns were identified. Among the "sword genes" those involved in embryonic organ development, sexual character development and coloration were highly expressed, while in the gonopodium rather more morphogenesis-related genes were found. Interestingly, many genes and genetic pathways are shared between both developing novel traits derived from median fins: the sword and the gonopodium. Our analyses show that a larger set of gene networks was co-opted during the development and evolution of the "older" gonopodium than in the "younger," and morphologically less complex trait, the sword. We provide a catalog of candidate genes for future efforts to dissect the development of those sexually selected exaggerated male traits in swordtails.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Co-option; gonopodium; key innovation; male-specific traits; RNA-Seq; swordtails; Xiphophorus

Zitieren

ISO 690

KANG, Ji Hyoun, Tereza MANOUSAKI, Paolo FRANCHINI, Susanne KNEITZ, Manfred SCHARTL, Axel MEYER, 2015. Transcriptomics of two evolutionary novelties : how to make a sperm-transfer organ out of an anal fin and a sexually selected "word" out of a caudal fin. In: Ecology and Evolution. 2015, 5(4), pp. 848-864. eISSN 2045-7758. Available under: doi: 10.1002/ece3.1390

BibTex

@article{Kang2015Trans-30738,
  year={2015},
  doi={10.1002/ece3.1390},
  title={Transcriptomics of two evolutionary novelties : how to make a sperm-transfer organ out of an anal fin and a sexually selected "word" out of a caudal fin},
  number={4},
  volume={5},
  journal={Ecology and Evolution},
  pages={848--864},
  author={Kang, Ji Hyoun and Manousaki, Tereza and Franchini, Paolo and Kneitz, Susanne and Schartl, Manfred and Meyer, Axel}
}

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Universitätsbibliographie

Ja