{"id":421580,"date":"2025-09-13T17:04:29","date_gmt":"2025-09-13T17:04:29","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/421580\/"},"modified":"2025-09-13T17:04:29","modified_gmt":"2025-09-13T17:04:29","slug":"atlas-blue-butterfly-shatters-animal-record-with-229-chromosomes","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/421580\/","title":{"rendered":"Atlas blue butterfly shatters animal record with 229 chromosomes"},"content":{"rendered":"<p>Scientists have sequenced the genome of the Atlas blue butterfly for the first time and confirmed it holds the highest chromosome number among multicellular animals.<\/p>\n<p>The butterfly lives in the mountain ranges of Morocco and northeast Algeria. It carries 229 pairs of chromosomes, while close relatives such as the Common blue butterfly have only 24.<\/p>\n<p>Researchers at the Wellcome Sanger Institute and the Institute of Evolutionary Biology in Barcelona found that the butterfly\u2019s extreme chromosome count came from splitting rather than duplication.<\/p>\n<p>Over about three million years, the chromosomes broke at sites where DNA was loosely packed. The sex chromosomes stayed intact, but the rest fractured into smaller pieces.<\/p>\n<p>Dr Charlotte Wright, first author at the Wellcome Sanger Institute, said the team deliberately chose to study the species. \u201cWhen we set out to start to understand evolution in butterflies, we knew we had to sequence the most extreme, and somewhat mysterious, Atlas blue butterfly,\u201d she said.<\/p>\n<p>Wright credited earlier fieldwork for making sequencing possible. <\/p>\n<p>She added, \u201cBeing able to see, in detail, how the Atlas blue butterfly chromosomes have been split over time in specific places, we can start to investigate what benefits this might have, how it impacts their ability to adapt to their environment, and whether there are any lessons we can learn from their DNA that might aid conservation in the future.\u201d<\/p>\n<p>Implications for evolution and health<\/p>\n<p>Chromosome changes like these may help species form and adapt. The Atlas blue butterfly belongs to a group that produced many related species in a short period of time. <\/p>\n<p>Splitting chromosomes could increase genetic diversity by allowing more frequent reshuffling of DNA, though it may also create risks because of added complexity.<\/p>\n<p><a href=\"https:\/\/www.ibe.upf-csic.es\/home\/-\/asset_publisher\/T2caeLMECPvW\/content\/the-tale-of-the-creature-with-the-most-chromosomes\/maximized#:~:text=By%20diving%20into%20the%20DNA,pairs%20of%20chromosomes%20in%20total.&amp;text=Atlas%20blue%20butterfly%20(Polyommatus%20atlantica).\" rel=\"noopener noreferrer nofollow\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" width=\"465\" height=\"700\" src=\"https:\/\/www.europesays.com\/uk\/wp-content\/uploads\/2025\/09\/Low-Res_Polyommatus-atlantica_1_Roger-Vila.jpg\" alt=\"\" class=\"wp-image-204257\"   title=\"Atlas blue butterfly packs 229 chromosomes, most of any multicellular animal\"\/><\/a>Atlas blue butterfly.         <br \/>Credit \u2013 Dr Roger Vila\/The Institute of Evolutionary Biology<\/p>\n<p>Dr Roger Vila, senior author at the Institute of Evolutionary Biology, said, \u201cBreaking down chromosomes has been seen in other species of butterflies, but not on this level, suggesting that there are important reasons for this process which we can now start to explore.\u201d <\/p>\n<p>He said studying whether these changes affect butterfly behaviour could explain how new species appear.<\/p>\n<p>The findings may also have medical value. Chromosome rearrangements occur in human cancers, where DNA segments break and reorganize. <\/p>\n<p>Scientists may find ways to slow or stop the process by comparing butterflies with cancer cells.<\/p>\n<p>Professor Mark Blaxter, senior author at the Wellcome Sanger Institute, explained why such research matters. \u201cGenomes hold the key to how a creature came to be, but also, where it might go in the future,\u201d he said. <\/p>\n<p>He pointed out that lessons from one species can inform conservation and health research.<\/p>\n<p>Conservation pressures grow<\/p>\n<p>Although the Atlas blue <a href=\"https:\/\/interestingengineering.com\/science\/butterfly-wings-inspire-faster-cancer-imaging\" target=\"_blank\" rel=\"dofollow noopener\">butterfly<\/a> has survived for millions of years with its fractured genome, its future is now uncertain. <\/p>\n<p>Habitat loss from the destruction of cedar forests, overgrazing, and climate change threatens its survival. Sequencing its genome provides a critical reference for conservationists to study how it might respond to warming conditions.<\/p>\n<p>Researchers say this high-quality reference <a href=\"https:\/\/interestingengineering.com\/innovation\/google-alphagenome-dna-variant-prediction-ai\" target=\"_blank\" rel=\"dofollow noopener\">genome<\/a> will help uncover how butterflies evolve and adapt. It may also guide efforts to develop crops that are better able to withstand environmental stress.<\/p>\n<p>The Atlas blue butterfly may be small and elusive, but its genetic story is vast.<\/p>\n<p>With 229 <a href=\"https:\/\/interestingengineering.com\/science\/human-ape-chromosome-sequencing\" target=\"_blank\" rel=\"dofollow noopener\">chromosome<\/a> pairs, it sets a world record and opens new paths to understanding evolution, survival, and health.<\/p>\n<p>The study is published in the journal <a href=\"https:\/\/www.cell.com\/current-biology\/fulltext\/S0960-9822(25)01098-X?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS096098222501098X%3Fshowall%3Dtrue\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Current Biology<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"Scientists have sequenced the genome of the Atlas blue butterfly for the first time and confirmed it holds&hellip;\n","protected":false},"author":2,"featured_media":421581,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3846],"tags":[142873,30572,144160,49011,267,144161,142878,70,16,15,50770],"class_list":{"0":"post-421580","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-genetics","8":"tag-atlas-blue-butterfly","9":"tag-birds","10":"tag-butterfly-genome","11":"tag-chromosome","12":"tag-genetics","13":"tag-institute-of-evolutionary-biology","14":"tag-polyommatus-atlantica","15":"tag-science","16":"tag-uk","17":"tag-united-kingdom","18":"tag-wellcome-sanger-institute"},"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/421580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/comments?post=421580"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/421580\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media\/421581"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media?parent=421580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/categories?post=421580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/tags?post=421580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}