{"id":23085,"date":"2020-07-08T14:28:00","date_gmt":"2020-07-08T11:28:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/novel-major-locus-regulates-beak-evolution-of-ground-tit\/"},"modified":"2020-07-08T14:28:00","modified_gmt":"2020-07-08T11:28:00","slug":"novel-major-locus-regulates-beak-evolution-of-ground-tit","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/novel-major-locus-regulates-beak-evolution-of-ground-tit\/","title":{"rendered":"#Novel major locus regulates beak evolution of ground tit"},"content":{"rendered":"

“#Novel major locus regulates beak evolution of ground tit<\/strong>”<\/p>\n

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\"Novel<\/img>
\n Fig. Comparison of beak morphology across 14 parid species. Credit: IOZ
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Classical quantitative genetics has found that most phenotypes are polygenic traits. Under this polygenic model, natural selection often acts on many loci simultaneously, resulting in the combination of a few loci with major effects and many loci with small effects controlling adaptive changes in phenotypes, which presents challenges to the understanding of the genetic basis underlying polygenic traits.<\/p>\n

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The avian beak is a typical polygenic trait, which is the consequence of the variety of functions that beaks serve (e.g., foraging, preening, nest-building, cavity excavation) and the diversity of habitats birds occupy. As a result, genetic basis of beak morphology was well studied in chickens and Darwin’s finches, yet remains poorly understood in wild birds.<\/p>\n

Due to the characteristics of being more likely to be fixed by strong selective coefficients and less susceptible to loss by genetic drift, major loci may be more relevant to phenotypes and easier to be detected from the genome.
\nProf. Lei Fumin’s team from the Institute of Zoology of the Chinese Academy of Science<\/a>s conducted phylogenomes of 14 tits species (Paridae). They found that a major locus (COL27A1) effects the beak elongation of the Ground Tit as response to ground-foraging and cavity-nesting habits on the Qinghai-Tibet Plateau.
\nThis study entitled “Comparative genomics reveals evolution of a beak morphology locus in a high-altitude songbird” has been published online in Molecular Biology and Evolution<\/i> on June 27th, 2020.
\nThe study combined two methods to perform genome-wide analyses across the 14 parid species, and identified 25 highly divergent genomic regions that are significantly associated with beak length, finding seven candidate genes involved in bone morphogenesis and remolding.
\nNeutrality tests indicated that a model allowing for a selective sweep in the highly conserved COL27A1 gene best explains variation in beak length.
\nThey also identified two non-synonymous fixed mutations in the collagen domain that are predicted to be functionally deleterious yet may have facilitated beak elongation.
\nAlthough this study did not do further functional experimental validation, it provides important insights into understanding the genetic mechanism of beak elongation and its role in the high-altitude adaptation, as well as highlights the importance of comparative genomics to studies of ecological adaptation and evo-devo.<\/p>\n

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More information:<\/strong>
\n Yalin Cheng et al. Comparative genomics reveals evolution of a beak morphology locus in a high-altitude songbird, Molecular Biology and Evolution<\/i> (2020). DOI: 10.1093\/molbev\/msaa157\n <\/div>\n

\n Citation<\/strong>:
\n Novel major locus regulates beak evolution of ground tit (2020, July 8)
\n retrieved 8 July 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-07-major-locus-beak-evolution-ground.html<\/p>\n

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“#Novel major locus regulates beak evolution of ground tit” Fig. Comparison of beak morphology across 14 parid species. Credit: IOZ Classical quantitative genetics has found that most phenotypes are polygenic traits. Under this polygenic model, natural selection often acts on many loci simultaneously, resulting in the combination of a few loci with major effects and…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[27702,34685],"class_list":["post-23085","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-ecology-molecular-computational-biology","tag-novel-major-locus-regulates-beak-evolution-of-ground-tit"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/23085","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=23085"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/23085\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=23085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=23085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=23085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}