Chromosomes and speciation in &lt;i&gt;Mus musculus domesticus&lt;/i&gt;

Capanna, Ernesto; Castiglia, Riccardo

doi:10.1159/000078210

Cited by 46 publications

(39 citation statements)

References 75 publications

(89 reference statements)

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“…It is known that crosses between chromosomal variants can result in hybrid inviability or impaired fitness (Capanna and Castiglia 2004). Speciation rates differ considerably between birds and mammals with the evolution of post-zygotic incompatibility being $10 times slower in birds than in mammals (Price and Bouvier 2002;Fitzpatrick 2004).…”

Section: Discussionmentioning

confidence: 99%

A Gene-Based Genetic Linkage Map of the Collared Flycatcher (Ficedula albicollis) Reveals Extensive Synteny and Gene-Order Conservation During 100 Million Years of Avian Evolution

et al. 2008

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By taking advantage of a recently developed reference marker set for avian genome analysis we have constructed a gene-based genetic map of the collared flycatcher, an important ''ecological model'' for studies of life-history evolution, sexual selection, speciation, and quantitative genetics. A pedigree of 322 birds from a natural population was genotyped for 384 single nucleotide polymorphisms (SNPs) from 170 protein-coding genes and 71 microsatellites. Altogether, 147 gene markers and 64 microsatellites form 33 linkage groups with a total genetic distance of 1787 cM. Male recombination rates are, on average, 22% higher than female rates (total distance 1982 vs. 1627 cM). The ability to anchor the collared flycatcher map with the chicken genome via the gene-based SNPs revealed an extraordinary degree of both synteny and gene-order conservation during avian evolution. The great majority of chicken chromosomes correspond to a single linkage group in collared flycatchers, with only a few cases of inter-and intrachromosomal rearrangements. The rate of chromosomal diversification, fissions/fusions, and inversions combined is thus considerably lower in birds (0.05/MY) than in mammals (0.6-2.0/MY). A dearth of repeat elements, known to promote chromosomal breakage, in avian genomes may contribute to their stability. The degree of genome stability is likely to have important consequences for general evolutionary patterns and may explain, for example, the comparatively slow rate by which genetic incompatibility among lineages of birds evolves.

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Section: Discussionmentioning

confidence: 99%

A Gene-Based Genetic Linkage Map of the Collared Flycatcher (Ficedula albicollis) Reveals Extensive Synteny and Gene-Order Conservation During 100 Million Years of Avian Evolution

et al. 2008

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“…Studies on, for example, Mus musculus domesticus have shown that crosses between chromosomal variants can result in hybrid inviability or impaired fitness (Capanna and Castiglia, 2004). The formation of post-zygotic incompatibility is substantially slower in birds than in mammals (Price and Bouvier, 2002;Fitzpatrick, 2004;Price, 2008), which may be explained by the slow rate of chromosomal rearrangement in birds.…”

Section: Synteny and Gene Ordermentioning

confidence: 99%

Avian genome evolution: insights from a linkage map of the blue tit (Cyanistes caeruleus)

et al. 2009

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We provide a first-generation linkage map of the blue tit (Cyanistes caeruleus), a passerine within the previously genetically uncharacterized family Paridae, which includes 91 orthologous loci with a single anchored position in the chicken (Gallus gallus) sequence assembly. The map consists of 18 linkage groups and covers 935 cM. There was highly conserved synteny between blue tit and chicken with the exception of a split on chromosome 1, potential splits on chromosome 4 and the translocation of two markers from chromosome 2 and 3, respectively, to chromosome 5. Gene order was very well conserved for the majority of chromosomes, an exception being chromosome 1 where multiple rearrangements were detected. Similar results were obtained in a comparison to the zebra finch (Taeniopygia guttata) genome assembly. The recombination rate in females was slightly higher than in males, implying a moderate degree of heterochiasmy in the blue tit. The map distance of the blue tit was B78% of that of the Wageningen chicken broiler population, and very similar to the Uppsala chicken mapping population, over homologous genome regions. Apart from providing insights into avian recombination and genome evolution, our blue tit linkage map forms a valuable genetic resource for ecological and evolutionary research in Paridae.

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“…This, together with its effects in the reduction of both fertility and recombination (especially in animals with Rb translocations in heterozygosis), suggests that Rb fusions may play an important role in speciation (e.g. Rieseberg 2001, Capanna & Castiglia 2004. Moreover, several studies have supported the idea that Rb fusions cause reproductive isolation in a number of mammal species (Theiler & Blanco 1996, De Oliveira et al 2000, Rogatcheva et al 2000, Fernández-Donoso et al 2001, Jadwiszczak & Banaszek(Gü ndüz et al 2001, Sans-Fuentes et al 2007, and they can act as isolating barriers between populations.…”

Section: Introductionmentioning

confidence: 99%

Spermatogenesis in house mouse in a Robertsonian polymorphism zone

Sans-Fuentes¹,

García‐Valero²,

Ventura³

et al. 2010

Reproduction

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Robertsonian (Rb) translocations can be important in speciation as a mechanism of postzygotic isolation between populations. Meiotic non-disjunction, gametogenic impairment, and association of impaired autosomal segments with sex chromosomes have been postulated as mechanisms responsible for reducing fertility in Rb mice. Quantitative histological studies needed to understand the role of Rb fusions in gametogenic impairment are scarce. Most research on Rb mice has analyzed meiotic non-disjunction of laboratory and wild-derived strains, which have complex or simple structural heterozygosity with large numbers of fusions. Using histological multilevel sampling, we examined spermatogenesis in mice from the Rb polymorphism area of Barcelona. We studied four chromosomal groups having: a) one Rb heterozygote fusion and 2nZ39, b) one Rb heterozygote fusion and 2nZ31, c) three Rb heterozygote fusions without monobrachial homology and with diploid number ranging from 2nZ29 to 2nZ37, and d) only Rb homozygote fusions with diploid number ranging from 2nZ28 to 2nZ30. Standard mice from the area surrounding the Rb zone were used as control. We analyzed morphological variables of the testes, relative frequency of stages in the seminiferous epithelium cycle, the 'round spermatids:primary spermatocytes' ratio, and other derived parameters. Our results reveal that structural homozygote mice and simple heterozygote mice having as few as one to three Rb fusions undergo greater germ cell death (GCD) than standard mice, suggesting that Rb fusions are related to increased GCD (in both the heterozygous and homozygous state) and may be the main cause of decreased gene flow between mice populations from this area.

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Chromosomes and speciation in <i>Mus musculus domesticus</i>

Cited by 46 publications

References 75 publications

A Gene-Based Genetic Linkage Map of the Collared Flycatcher (Ficedula albicollis) Reveals Extensive Synteny and Gene-Order Conservation During 100 Million Years of Avian Evolution

A Gene-Based Genetic Linkage Map of the Collared Flycatcher (Ficedula albicollis) Reveals Extensive Synteny and Gene-Order Conservation During 100 Million Years of Avian Evolution

Avian genome evolution: insights from a linkage map of the blue tit (Cyanistes caeruleus)

Spermatogenesis in house mouse in a Robertsonian polymorphism zone

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