Exploring chromosome evolution in 250 million year old groups of dragonflies and damselflies (Insecta:Odonata).

Autor: Tolman ER; Division of Invertebrate Zoology, American Museum of Natural History, New York City, New York, USA.; Graduate Center, City University of New York, New York City, New York, USA., Beatty CD; Program for Conservation Genomics, Department of Biology, Stanford University, Stanford, California, USA., Bush J; Huck Institute of Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, USA., Kohli MK; Division of Invertebrate Zoology, American Museum of Natural History, New York City, New York, USA.; Department of Natural Sciences, Baruch College, City University of New York, New York, New York, USA., Frandsen PB; Huck Institute of Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, USA.; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.; LOEWE Centre for Translational Biodiversity Genomics (LOEWE-TBG), Frankfurt, Germany.; Data Science Lab, Office of the Chief Information Officer, Smithsonian Institution, Washington, District of Columbia, USA., Gosnell JS; Graduate Center, City University of New York, New York City, New York, USA.; Department of Natural Sciences, Baruch College, City University of New York, New York, New York, USA., Ware JL; Division of Invertebrate Zoology, American Museum of Natural History, New York City, New York, USA.
Jazyk: angličtina
Zdroj: Molecular ecology [Mol Ecol] 2023 Nov; Vol. 32 (21), pp. 5785-5797. Date of Electronic Publication: 2023 Oct 03.
DOI: 10.1111/mec.17147
Abstrakt: Using recently published chromosome-length genome assemblies of two damselfly species, Ischnura elegans and Platycnemis pennipes, and two dragonfly species, Pantala flavescens and Tanypteryx hageni, we demonstrate that the autosomes of Odonata have undergone few fission, fusion, or inversion events, despite 250 million years of separation. In the four genomes discussed here, our results show that all autosomes have a clear ortholog in the ancestral karyotype. Despite this clear chromosomal orthology, we demonstrate that different factors, including concentration of repeat dynamics, GC content, relative position on the chromosome, and the relative proportion of coding sequence all influence the density of syntenic blocks across chromosomes. However, these factors do not interact to influence synteny the same way in any two pairs of species, nor is any one factor retained in all four species. Furthermore, it was previously unknown whether the micro-chromosomes in Odonata are descended from one ancestral chromosome. Despite structural rearrangements, our evidence suggests that the micro-chromosomes in the sampled Odonata do indeed descend from an ancestral chromosome, and that the micro-chromosome in P. flavescens was lost through fusion with autosomes.
(© 2023 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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