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Yellow-rumped Warbler complex (1 Viewer)
- Thread starter ntbirdman
- Start date
Richard Klim
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Toews et al 2013
GrrlScientist, Guardian, 3 Oct 2013: Butterbutt biology: warblers, migration and mitochondria.
UBC News, 19 Sep 2013: Songbirds may have "borrowed" DNA to fuel migration.
GrrlScientist, Guardian, 3 Oct 2013: Butterbutt biology: warblers, migration and mitochondria.
Richard Klim
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from http://www.aou.org/committees/nacc/proposals/2010_A_votes_web.php
My take is that even if this paper does not explicitly mention taxonomic consequences, the data in the paper to a large extent covers the deficits of knowledge regarding what is going on in the auduboni/nigrifrons contact region. Those are clearly not two species.
A few of the comments seemed to think that there was a lack of knowledge about the last form (goldmani). This paper obviously do not address that.
Niels
My take is that even if this paper does not explicitly mention taxonomic consequences, the data in the paper to a large extent covers the deficits of knowledge regarding what is going on in the auduboni/nigrifrons contact region. Those are clearly not two species.
A few of the comments seemed to think that there was a lack of knowledge about the last form (goldmani). This paper obviously do not address that.
Niels
Richard Klim
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10,000 Birds
David Ringer, 10,000 Birds, 26 Jan 2014: Mitochondrial mysteries and splitting-lumping Yellow-rumped Warblers.
David Ringer, 10,000 Birds, 26 Jan 2014: Mitochondrial mysteries and splitting-lumping Yellow-rumped Warblers.
Richard Klim
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Richard Klim
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Peter Kovalik
Well-known member
Here is a nice piece out of Cornell summarizing some of the Toews paper for a popular birdwatching audience.
In case my link above breaks, here is the full link as well:
https://www.allaboutbirds.org/goodb...see-a-return-to-myrtle-and-audubons-warblers/
In case my link above breaks, here is the full link as well:
https://www.allaboutbirds.org/goodb...see-a-return-to-myrtle-and-audubons-warblers/
Daniel Philippe
Well-known member
Brelsford A., Toews D.P.L. & Irwin D.E., 2017. Admixture mapping in a hybrid zone reveals loci associated with avian feather coloration. Proc. Roy. Soc. B 284: 20171106, 1-9.
Abstract
Identifying the genetic bases for colour patterns has provided important insights into the control and expression of pigmentation and how these characteristics influence fitness. However, much more is known about the genetic bases for traits based on melanin pigments than for traits based on another major class of pigments, carotenoids. Here, we use natural admixture in a hybrid zone between Audubon's and myrtle warblers (Setophaga coronata auduboni/S. c. coronata) to identify genomic regions associated with both types of pigmentation. Warblers are known for rapid speciation and dramatic differences in plumage. For each of five plumage coloration traits, we found highly significant associations with multiple single-nucleotide polymorphisms (SNPs) across the genome and these were clustered in discrete regions. Regions near significantly associated SNPs were enriched for genes associated with keratin filaments, fibrils that make up feathers. A carotenoid-based trait that differs between the taxa—throat colour—had more than a dozen genomic regions of association. One cluster of SNPs for this trait overlaps the Scavenger Receptor Class F Member 2 (SCARF2) gene. Other scavenger receptors are presumed to be expressed at target tissues and involved in the selective movement of carotenoids into the target cells, making SCARF2 a plausible new candidate for carotenoid processing. In addition, two melanin-based plumage traits—colours of the eye line and eye spot—show very strong associations with a single genomic region mapping to chromosome 20 in the zebra finch. These findings indicate that only a subset of the genomic regions differentiated between these two warblers are associated with the plumage differences between them and demonstrate the utility of reduced-representation genomic scans in hybrid zones.
Abstract
Identifying the genetic bases for colour patterns has provided important insights into the control and expression of pigmentation and how these characteristics influence fitness. However, much more is known about the genetic bases for traits based on melanin pigments than for traits based on another major class of pigments, carotenoids. Here, we use natural admixture in a hybrid zone between Audubon's and myrtle warblers (Setophaga coronata auduboni/S. c. coronata) to identify genomic regions associated with both types of pigmentation. Warblers are known for rapid speciation and dramatic differences in plumage. For each of five plumage coloration traits, we found highly significant associations with multiple single-nucleotide polymorphisms (SNPs) across the genome and these were clustered in discrete regions. Regions near significantly associated SNPs were enriched for genes associated with keratin filaments, fibrils that make up feathers. A carotenoid-based trait that differs between the taxa—throat colour—had more than a dozen genomic regions of association. One cluster of SNPs for this trait overlaps the Scavenger Receptor Class F Member 2 (SCARF2) gene. Other scavenger receptors are presumed to be expressed at target tissues and involved in the selective movement of carotenoids into the target cells, making SCARF2 a plausible new candidate for carotenoid processing. In addition, two melanin-based plumage traits—colours of the eye line and eye spot—show very strong associations with a single genomic region mapping to chromosome 20 in the zebra finch. These findings indicate that only a subset of the genomic regions differentiated between these two warblers are associated with the plumage differences between them and demonstrate the utility of reduced-representation genomic scans in hybrid zones.
