2000
DOI: 10.1098/rspb.2000.1217
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Multiple origins of XY female mice ( genus Akodon ): phylogenetic and chromosomal evidence

Abstract: Despite the diversity in sex determination across organisms, theory predicts that the evolution of XY females is rare in mammals due to ¢tness consequences associated with infertility or the loss of YY zygotes. We investigated this hypothesis from a phylogenetic perspective by examining the inter-and intraspeci¢c distribution of Y chromosomes in males and females (XY females) in South American ¢eld mice (Akodon). We found that XY females occurred at appreciable frequencies (10^66%) in at least eight Akodon spe… Show more

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Cited by 32 publications
(44 citation statements)
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“…A: Three species of spiny rat (genus Tokudaia) live on islands in south Japan. The Amami spiny rat retains a Y chromosome but the Amami and Tokunoshima spiny rat have no Y and no SRY 80. B: The process of loss of the Y.…”
Section: How Do New Sex Chromosomes Become Fixed?mentioning
confidence: 99%
See 1 more Smart Citation
“…A: Three species of spiny rat (genus Tokudaia) live on islands in south Japan. The Amami spiny rat retains a Y chromosome but the Amami and Tokunoshima spiny rat have no Y and no SRY 80. B: The process of loss of the Y.…”
Section: How Do New Sex Chromosomes Become Fixed?mentioning
confidence: 99%
“…There are several examples of closely related rodent species with variant sex chromosomes. As well as the two genera that contain Y‐less species discussed above, there are three species of Patagonian akodont mice that have evolved an inactive SRY gene, leading to SRY + female mice 80. Since other species in the same clade do not have SRY + females, these changes were thought to be independent; however, they may have occurred after SRY was mutationally damaged, or relocated to part of the Y subject to epigenetic silencing in an ancestral animal.…”
Section: Is There a New Round Of Mammalian Sex Chromosome Turnover Anmentioning
confidence: 99%
“…In at least nine species of the South American rodent genus, Akodon, heterogametic XY* females occur together with normal XX females and XY males [51]. Although feminization has been attributed to an 'inactivation mutation' on the Y*-chromosome [52], sequencing and restriction fragment length polymorphism (RFLP) studies of Sry -the primary male-determining gene in mammals -have not detected any within-species differences between XY and XY* individuals [15,51].…”
Section: Box 2 Feminization Of Xy Males In Akodonmentioning
confidence: 99%
“…Although feminization has been attributed to an 'inactivation mutation' on the Y*-chromosome [52], sequencing and restriction fragment length polymorphism (RFLP) studies of Sry -the primary male-determining gene in mammals -have not detected any within-species differences between XY and XY* individuals [15,51]. Both Y-and Y*-chromosomes possess multiple copies of the Sry locus, and the male-specific zinc finger locus, Zfy [15].…”
Section: Box 2 Feminization Of Xy Males In Akodonmentioning
confidence: 99%
“…There are at least four types of deviations (Veyrunes et al, 2010): (1) typical XY males and different females with XX and XY in Myopus schisticolor Lilljeborg, 1844, Dicrostonyx torquatus Pallas, 1778, Akodon sp. (Fredga, 1983(Fredga, , 1994Hoekstra, Edwards 2000;Ortiz et al, 2009); (2) typical XY males and deviant XO females (single X) in Microtus oregoni Bachman, 1839 (Ohno et al, 1966;Fredga, 1983); (3) females and males with XO karyotypes in Tokudaia osimensis Abe, 1933, T. tokunoshimensis Endo et Tsuchiya, 2006(Arakawa et al, 2002 and Ellobius lutescens Thomas, 1897 (Matthey 1953;Just et al, 1995); (4) males and females with identical isomorphic XX in three sibling species of Ellobius, E. tancrei Blasius, 1884, E. talpinus Pallas, 1770 and E. alaicus Vorontsov et al, 1969(Vorontsov et al, 1980Bakloushinskaya, Lyapunova, 1990;Just et al, 2007;Romanenko et al, 2007).…”
Section: Introductionmentioning
confidence: 99%