Evolution of postzygotic reproductive isolation in galliform birds: analysis of first and second hybrid generations and backcrosses

Arrieta, Ramiro S.; Lijtmaer, Darío A; Tubaro, Pablo L.

doi:10.1111/bij.12153

Cited by 31 publications

(33 citation statements)

References 61 publications

(91 reference statements)

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“…Second, the evolution of reproductive isolation is protracted in birds relative to other taxa (Prager and Wilson 1975;Fitzpatrick 2004;Price 2008). Astoundingly, fully fertile hybrids have been documented from bird species that have diverged for up to 10 million years (Tubaro and Lijtmaer 2002;Lijtmaer et al 2003;Price 2008;Arrieta et al 2013). In many other taxa, studies of gene expression have pointed to frequent misexpression in F1 hybrids (Landry et al 2005;McManus et al 2010;Malone and Michalak 2008;Renaut et al 2009;Bell et al 2013;Coolon et al 2014).…”

Section: Dobzhansky-mentioning

confidence: 99%

“…Although there is extensive information about fertility and viability loss in hybrid birds (Tubaro and Lijtmaer 2002;Lijtmaer et al 2003;Price 2008;Arrieta et al 2013), to date there have been no studies of regulatory divergence in bird species and their hybrids. While zebra finches (Taeniopygia guttata) are an established model system for the neurobiology of song learning (Clayton et al 2009), they also have great potential for mechanistic studies of speciation.…”

Section: Dobzhansky-mentioning

confidence: 99%

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Gene Regulatory Evolution During Speciation in a Songbird

Balakrishnan

Davidson

2015

Preprint

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Over the last decade, tremendous progress has been made toward a comparative understanding of gene regulatory evolution. However, we know little about how gene regulation evolves in birds, and how divergent genomes interact in their hybrids. Because of the unique features of birds -female heterogamety, a highly conserved karyotype, and the slow evolution of reproductive incompatibilities -an understanding of regulatory evolution in birds is critical to a comprehensive understanding of regulatory evolution and its implications for speciation. Using a novel complement of analyses of replicated RNA-seq libraries, we demonstrate abundant divergence in brain gene expression between zebra finch (Taeniopygia guttata) subspecies. By comparing parental populations and their F1 hybrids, we also show that gene misexpression is relatively rare among brain-expressed transcripts in male birds. If this pattern is consistent across tissues and sexes, it may partially explain the slow buildup of postzygotic reproductive isolation observed in birds relative to other taxa. Although we expected that the action of genetic drift on the islanddwelling zebra finch subspecies would be manifested in a higher rate of trans regulatory divergence, we found that most divergence was in cis regulation, following a pattern commonly observed in other taxa. Thus, our study highlights both unique and shared features of avian regulatory evolution. KEYWORDS

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Section: Dobzhansky-mentioning

confidence: 99%

Section: Dobzhansky-mentioning

confidence: 99%

Gene Regulatory Evolution During Speciation in a Songbird

Balakrishnan

Davidson

2015

Preprint

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“…In birds, where sex is determined by a ZZ/ZW system, females are the heterogametic sex and hybrid females are thus expected to show greater fitness reductions compared to male hybrids. This expectation has been confirmed for birds in general (Price and Bouvier, 2002), but also for specific bird groups, including ducks (Tubaro and Lijtmaer, 2002), galliform birds (Arrieta et al, 2013), and pigeons and doves (Lijtmaer et al, 2003). Consequently, introgression of maternally inherited loci, such as mitochondrial and W-linked loci, will be impaired by unfit (e.g., sterile) females.…”

Section: Comparison Of Genomic Classesmentioning

confidence: 76%

“…Such analyses provide insights, not only into the fertility of hybrids, but also into the fertility and viability of backcrosses. For instance, Arrieta et al (2013) showed that hybrid inviability was higher in F 2 compared to F 1 hybrids in galliform birds, indicating that interspecific gene flow may be hampered due to inviable F 2 hybrids. For geese, the fertility of male birds at high genetic distances suggests the possibility of interspecific gene flow between distantly related species (e.g., Greylag Goose and Canada Goose), but if consequent backcrosses are sterile or not viable, then the possibility of interspecific gene flow is greatly reduced.…”

Section: Fertility Of Goose Hybridsmentioning

confidence: 99%

“…Third, there may be little recent gene flow because of strong intrinsic and/or extrinsic selection against goose hybrids. Although most goose hybrids are viable and fertile (Ottenburghs et al, 2016c), second generation hybrids or backcrosses may be impaired by genetic incompatibilities (Arrieta et al, 2013, Lijtmaer et al, 2003, or hybrids might be ecologically maladapted (e.g., intermediate beak morphology) or unable to find a mate (Coyne and Orr, 2004). To answer these questions, field observations are needed, which is challenging given the relative rarity of hybrids (Ottenburghs et al, 2016c) and the difficulty of identifying certain hybrids (Randler, 2004).…”

Section: General Patterns Of Introgressionmentioning

confidence: 99%

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Crossing species boundaries : the hybrid histories of the true geese

Ottenburghs¹

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. Crossing Species Boundaries: The Hybrid Histories of the True Geese. PhD thesis, Wageningen University, the Netherlands. Hybridization, the interbreeding of different species, is a common phenomenon in birds: about 16% of bird species is known to have hybridized with at least one other species. Numerous avian hybrid zones have been studied from a morphological or genetic perspective, often documenting the interspecific exchange of genetic material by hybridization and backcrossing (i.e. introgression). The incidence of hybridization varies among bird orders with the Anseriformes (waterfowl: ducks, geese and swans) showing the highest propensity to hybridize. In this thesis, I provide a genomic perspective on the role of hybridization in the evolutionary history of one particular anseriform tribe, the Anserini or "True Geese", which comprises 17 species divided over two genera: Anser and Branta . The diversification of this bird group took place in the late Pliocene and the early Pleistocene (between four and two million years ago), conceivably driven by a global cooling trend that led to the establishment of a circumpolar tundra belt and the emergence of temperate grasslands. Most species show a steady population increase during this period, followed by population subdivision during the Last Glacial Maximum about 110,000 to 12,000 years ago. The combination of large effective population sizes and occasional range shifts facilitated contact between the diverging goose species, resulting in high levels of interspecific gene flow. Introgressive hybridization might have enabled these goose populations to quickly adapt to changing environments by transferring of advantageous alleles across species boundaries, increasing standing genetic variation or expanding phenotypic variation of certain traits (e.g., beak morphology). Hybridization seems to be a common and integral component in the evolution and diversification of geese. The pervasiveness of rapid speciation and hybridization in geese complicates the attempt to capture their evolutionary history in a phylogenetic tree, therefore I advocate a phylogenetic network approach. Indeed, trying to capture the complex diversification of the True Geese in a branching tree can be regarded as a wild goose chase. Abstract TABLE OF CONTENTS

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