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10 results for “Mus minutoides”
Genotypic sex shapes maternal care in the African Pygmy mouse, Mus minutoides
<p><span>Sexually dimorphic behaviours, such as parental care, have long been thought to be </span><span>mainly</span><span> driven by gonadal hormones. In the past two decades, a few studies have challenged this view, highlighting the direct influence of the sex chromosome complement (XX vs XY or ZZ vs ZW). The African pygmy mouse, </span><span>Mus minutoides</span><span>, is a wild mouse species with naturally occurring XY sex reversal induced by a third, feminizing X* chromosome, leading to three female genotypes: XX, XX* and X*Y. Here, we show that sex reversal in X*Y females shapes a divergent maternal care strategy (maternal aggression, pup retrieval and nesting behaviours) from both XX and XX* females. Although neuroanatomical investigations were inconclusive, we show that the dopaminergic system in the anteroventral periventricular nucleus of the hypothalamus is worth investigating further as it may support differences in pup retrieval behaviour between females. Combining </span><span>behaviours</span><span> and neurobiology in a rodent subject to natural selection, we evaluate potential candidates for the neural basis of maternal behaviours and strengthen the underestimated role of the sex chromosomes in shaping sex differences in brain and behaviours. All things considered, we further highlight the emergence of a third sexual phenotype, challenging the binary view of phenotypic sexes.</span></p>
Genotypic sex shapes maternal care in the African Pygmy mouse, Mus minutoides
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Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal.
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On following pages: 534. Macedonian Mouse (Mus macedonicus); 535. Mound-building Mouse (Mus spicilegus); 536. Cypriot Mouse (Mus cypriacus); 537. Ethiopian Striped Mouse (Mus imberbis); 538. Mahomet Mouse (Mus mahomet): 539. Hausa Mouse (Mus haussa); 540. West African Pygmy Mouse (Mus musculoides); 541. Baoule Mouse (Mus baoulei); 542. Matthey's Mouse (Mus mattheyi); 543. Toad Mouse (Mus bufo); 544. Callewaert's Mouse (Mus callewaerti); 545. Gounda Mouse (Mus goundae); 546. Neave's Mouse (Mus neavel); 547. Ubangui Mouse (Mus oubanguii); 548. Peters's Mouse (Mus setulosus); 549. Thomas's Mouse (Mus sorella): 550. Gray-bellied Mouse (Mustriton); 551. Delicate Mouse (Mus tenellus); 552. Desert Pygmy Mouse (Mus indutus); 553. Sub-Saharan Pygmy Mouse (Mus minutoides); 554. Setzer's Mouse (Mus setzeri); 555. Little Indian Field Mouse (Mus booduga); 556. Phillips's Mouse (Mus phillipsi); 557. Flat-haired Mouse (Mus platythrix); 558. Saxicolous Mouse (Mus saxicola); 559. Earth-colored Mouse (Mus terricolon); 560. Servant Mouse (Mus famulus): 561. Ceylon Spiny Mouse (Mus fernandoni); 562. Mayor's Mouse (Mus mayori); 563. Ryukyu Mouse (Mus caroli); 564. Fawn-colored Mouse (Mus cervicolor); 565. Cook's Mouse (Mus cookii); 566. Sheath-tailed Mouse (Mus fragilicauda); 567. Little Burmese Field Mouse (Mus lepidoides); 568. Blyth's Mouse (Mus nitidulus); 569. Indochinese Shrew-like Mouse (Mus pahari); 570. Shortridge's Mouse (Mus shortridgei); 571. Sumatran Shrew-like Mouse (Mus crociduroides); 572. Javan Shrew-like Mouse (Mus vulcani). in Muridae
On following pages: 534. Macedonian Mouse (Mus macedonicus); 535. Mound-building Mouse (Mus spicilegus); 536. Cypriot Mouse (Mus cypriacus); 537. Ethiopian Striped Mouse (Mus imberbis); 538. Mahomet Mouse (Mus mahomet): 539. Hausa Mouse (Mus haussa); 540. West African Pygmy Mouse (Mus musculoides); 541. Baoule Mouse (Mus baoulei); 542. Matthey's Mouse (Mus mattheyi); 543. Toad Mouse (Mus bufo); 544. Callewaert's Mouse (Mus callewaerti); 545. Gounda Mouse (Mus goundae); 546. Neave's Mouse (Mus neavel); 547. Ubangui Mouse (Mus oubanguii); 548. Peters's Mouse (Mus setulosus); 549. Thomas's Mouse (Mus sorella): 550. Gray-bellied Mouse (Mustriton); 551. Delicate Mouse (Mus tenellus); 552. Desert Pygmy Mouse (Mus indutus); 553. Sub-Saharan Pygmy Mouse (Mus minutoides); 554. Setzer's Mouse (Mus setzeri); 555. Little Indian Field Mouse (Mus booduga); 556. Phillips's Mouse (Mus phillipsi); 557. Flat-haired Mouse (Mus platythrix); 558. Saxicolous Mouse (Mus saxicola); 559. Earth-colored Mouse (Mus terricolon); 560. Servant Mouse (Mus famulus): 561. Ceylon Spiny Mouse (Mus fernandoni); 562. Mayor's Mouse (Mus mayori); 563. Ryukyu Mouse (Mus caroli); 564. Fawn-colored Mouse (Mus cervicolor); 565. Cook's Mouse (Mus cookii); 566. Sheath-tailed Mouse (Mus fragilicauda); 567. Little Burmese Field Mouse (Mus lepidoides); 568. Blyth's Mouse (Mus nitidulus); 569. Indochinese Shrew-like Mouse (Mus pahari); 570. Shortridge's Mouse (Mus shortridgei); 571. Sumatran Shrew-like Mouse (Mus crociduroides); 572. Javan Shrew-like Mouse (Mus vulcani).
Data from: XY females do better than the XX in the African pygmy mouse, Mus minutoides
All therian mammals have a similar XY/XX sex determination system except for a dozen species. The African pygmy mouse, Mus minutoides, harbors an unconventional system in which all males are XY, and there are three types of females: the usual XX but also XX* and X*Y ones (the asterisk designates a sex reversal mutation on the X chromosome). The long-term evolution of such a system is a paradox, since X*Y females are expected to face high reproductive costs (e.g. meiotic disruption and loss of unviable YY embryos), which should prevent invasion and maintenance of a sex-reversal mutation. Hence, mechanisms for compensating for the costs could have evolved in M. minutoides. Data gathered from our laboratory colony revealed that X*Y females do compensate and even show enhanced reproductive performance in comparison to the XX and XX*; they produce significantly more offspring due to (i) a higher probability of breeding, (ii) an earlier first litter, and (iii) a larger litter size, linked to (iv) a greater ovulation rate. These findings confirm that rare conditions are needed for an atypical sex determination mechanism to evolve in mammals, and provide valuable insight into understanding modifications of systems with highly heteromorphic sex chromosomes.
Figure 1 from: McDonough M, Sotero-Caio C, Ferguson A, Lewis P, Tswiio M, Thies M (2013) Mitochondrial DNA and karyotypic data confirm the presence of Mus indutus and Mus minutoides (Mammalia, Rodentia, Muridae, Nannomys) in Botswana. ZooKeys 359: 35-51. https://doi.org/10.3897/zookeys.359.6247
Figure 1 - Distributions for three species of Nannomys in southern Africa. Dark grey indicates distribution for Mus minutoides, light grey for Mus indutus, and stippled pattern for Mus setzeri, adapted from Monadjem (2008a), Monadjem (2008b), and Monadjem and Coetzee (2008), respectively. Five trapping localities in Botswana (a); black crosses indicate captures for Mus minutoides and grey triangles for Mus indutus. Records from northwestern Botswana, Ngamiland District (b). Locality of syntopic records for Mus indutus and Mus minutoides at Koanaka Hills site (c).
Figure 3 from: McDonough M, Sotero-Caio C, Ferguson A, Lewis P, Tswiio M, Thies M (2013) Mitochondrial DNA and karyotypic data confirm the presence of Mus indutus and Mus minutoides (Mammalia, Rodentia, Muridae, Nannomys) in Botswana. ZooKeys 359: 35-51. https://doi.org/10.3897/zookeys.359.6247
Figure 3 - Karyotypes of female TK164752 (a) and male TK164768 (c) Mus minutoides and female TK164753 Mus indutus (e) from Botswana. The chromosome arms identified in yellow on the images to the right of each karyogram correspond to regions of homology to the X chromosome of Mus musculus detected by FISH for female TK164752 (b) and male TK164768 (d) Mus minutoides and female TK164820 Mus indutus (f). Note that in Mus minutoides, a single chromosome arm shows homology to the X chromosome of the house mouse, indicating the presence of an X-autosome translocation, whereas a whole acrocentric chromosome corresponds to the X of Mus indutus. The insert on (b) represents the (1.X) translocation of individual TK164752 Mus minutoides, with the long arm corresponding to the X chromosome.
Figure 2 from: McDonough M, Sotero-Caio C, Ferguson A, Lewis P, Tswiio M, Thies M (2013) Mitochondrial DNA and karyotypic data confirm the presence of Mus indutus and Mus minutoides (Mammalia, Rodentia, Muridae, Nannomys) in Botswana. ZooKeys 359: 35-51. https://doi.org/10.3897/zookeys.359.6247
Figure 2 - Cytochrome b gene tree generated from 741 base pairs including 125 taxa using Bayesian inference. Grey boxes indicate species of interest: Mus minutoides and Mus indutus. Clades that include Mus from Botswana are enlarged to the right of the phylogeny. Diploid and fundamental numbers are shown for individuals sampled in this study and Veyrunes et al. (2005). Identification includes GenBank number and general locality. Support values at nodes are Bayesian posterior probabilities followed by Maximum-likelihood bootstrap support; dashes indicate regions of the tree where Maximum-likelihood analysis resulted in a polytomy.
Data from: XY females do better than the XX in the African pygmy mouse, Mus minutoides
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The comparison of iPSCs and fibroblasts in Mus minutoides
GEO Series GSE245095. Mus minutoides. 4 samples. Type: Expression profiling by high throughput sequencing.
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