Occasional paternal inheritance of the germline-restricted chromosome in songbirds

Author:

Pei Yifan1ORCID,Forstmeier Wolfgang1ORCID,Ruiz-Ruano Francisco J.23ORCID,Mueller Jakob C.1ORCID,Cabrero Josefa4ORCID,Camacho Juan Pedro M.4ORCID,Alché Juan D.5ORCID,Franke Andre6,Hoeppner Marc6,Börno Stefan7ORCID,Gessara Ivana8ORCID,Hertel Moritz8,Teltscher Kim1ORCID,Knief Ulrich9ORCID,Suh Alexander23ORCID,Kempenaers Bart1ORCID

Affiliation:

1. Department of Behavioral Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology 82319 Seewiesen, Germany

2. School of Biological Sciences, University of East Anglia, Norwich NR4 7TU, United Kingdom

3. Department of Organismal Biology, Evolutionary Biology Centre, Science for Life Laboratory, Uppsala University SE-752 36 Uppsala, Sweden

4. Department of Genetics, University of Granada E-18071 Granada, Spain

5. Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Spanish National Research Council E-18008 Granada, Spain

6. Institute of Clinical Molecular Biology, Christian-Albrechts-Universität zu Kiel 24118 Kiel, Germany

7. Sequencing Core Facility, Max Planck Institute for Molecular Genetics 14195 Berlin, Germany

8. Department of Behavioral Neurobiology, Max Planck Institute for Ornithology 82319 Seewiesen, Germany

9. Division of Evolutionary Biology, Faculty of Biology, Ludwig Maximilian University of Munich D-82152 Planegg-Martinsried, Germany

Abstract

SignificanceMost if not all songbirds possess a germline-restricted chromosome (GRC) which is believed to be exclusively maternally inherited. However, we show that, in the zebra finch, the GRC can also be paternally inherited and that the potential for paternal inheritance may differ between families. We further show that the genetic diversity of the GRC is extremely reduced compared to the high diversity of mitochondrial DNA lineages, suggesting that a single GRC haplotype has spread through the Australian zebra finch population relatively recently via occasional paternal inheritance. Our study therefore suggests that the GRC has the potential to evolve in a selfish manner, which could result in intragenomic conflict.

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

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