1998
DOI: 10.1080/11250008809386761
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Progressive differentiation of the W sex‐chromosome between oviparous and viviparous populations ofZootoca vivipara(Reptilia, Lacertidae)

Abstract: Populations of Zootoca vivipara appear karyologically well differentiated by heterochromatin distribution both in autosomes and sex-chromosomes; allopatric oviparous populations possess few elements with centromeric heterochromatin and W acrocentric sex-chromosomes with heterochromatin only on the centromere; Alpine, as well as central-western European viviparous populations possess conspicuous centromeric bands of heterochromatin on all of the chromosome pairs and a metacentric W chromosome with paracentromer… Show more

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Cited by 23 publications
(34 citation statements)
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“…Moreover, the time scale of this scenario is in accord with our allozymes and mtDNA analyses which both suggest that the differentiation of the two reproductive forms of L. vivipara could have begun between 2 and 0.5 mybp, that is, during the Pleistocene (Guillaume et al, 1997;Heulin et al, 1999). Finally, some aspects of this scenario are also consistent with a karyological variation identified in L. vivipara: females from southwestern oviparous populations and from eastern viviparous populations both have an uniarmed (acrocentric-subtelocentric) W chromosome, whereas those from western viviparous populations possess a biarmed (metacentric) W chromosome (Odierna et al, 1998; and Fig. 1).…”
supporting
confidence: 54%
See 2 more Smart Citations
“…Moreover, the time scale of this scenario is in accord with our allozymes and mtDNA analyses which both suggest that the differentiation of the two reproductive forms of L. vivipara could have begun between 2 and 0.5 mybp, that is, during the Pleistocene (Guillaume et al, 1997;Heulin et al, 1999). Finally, some aspects of this scenario are also consistent with a karyological variation identified in L. vivipara: females from southwestern oviparous populations and from eastern viviparous populations both have an uniarmed (acrocentric-subtelocentric) W chromosome, whereas those from western viviparous populations possess a biarmed (metacentric) W chromosome (Odierna et al, 1998; and Fig. 1).…”
supporting
confidence: 54%
“…It has long been stressed that a particular karyological event occurred in L. vivipara: an unequal number of chromosomes in males and females (respectively 2N ϭ 36 and 35 chromosomes), which has been documented for the viviparous populations and for the western oviparous populations of this species, has been interpreted as the result of a fusion of an ancestral W chromosome with an autosome, giving rise to a neo-W and to a particular female sex chromosome system called Z1Z2W (Chevalier et al, 1979;Odierna et al, 1993Odierna et al, , 1998Belcheva et al, 1986;Kupriyanova et al, 1995;Kupriyanova and Rudi, 1990;Kupriyanova 1986Kupriyanova , 1990Kupriyanova and Böhme, 1997). However, the evolutionary stage just prior to the W ϩ autosome fusion, (i.e., females with 2N ϭ 36 chromosomes) had not been discovered until very recently.…”
mentioning
confidence: 99%
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“…carniolica , the viviparous Hungarian population of Osca, and Austrian populations of Turracher Höhe and Neunkirchner Hütte. A complex Z 1 Z 1 Z 2 Z 2 /Z 1 Z 2 W system with different W morphologies was found in other populations: a telocentric/subtelocentric W chromosome is present in oviparous Pyrenean populations and viviparous eastern populations, a metacentric W chromosome is detected in central-western European populations, and a submetacentric one is characteristic of Romanian populations [Odierna et al, 1998[Odierna et al, , 2004Kupriyanova et al, 2005 and unpublished data] ( Fig. 1 ).…”
Section: Isolation and Characterization Of Interspersed Repeated Sequmentioning
confidence: 99%
“…material, see www.karger.com/doi/10.1159/000497304 ). All these specimens were already used in other studies [Odierna et al, 1998[Odierna et al, , 2001[Odierna et al, , 2004Kupriyanova et al, 2005;Surget-Groba et al, 2001.…”
Section: Samplingmentioning
confidence: 99%