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Sexual dimorphism in the early embryogenesis in zebra finches


Sexual dimorphism in the early embryogenesis in zebra finches

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dc.contributor.author Tagirov, Makhsud pl
dc.contributor.author Rutkowska, Joanna [SAP11018774] pl
dc.date.accessioned 2015-04-30T11:56:17Z
dc.date.available 2015-04-30T11:56:17Z
dc.date.issued 2014 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/6287
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/pl/legalcode *
dc.title Sexual dimorphism in the early embryogenesis in zebra finches pl
dc.type JournalArticle pl
dc.abstract.en Sex-specific gene expression before the onset of gonadogensis has been documented in embryos of mammals and chickens. In several mammalian species, differences in gene expression are accompanied by faster growth of pre-implantation male embryos. Here we asked whether avian embryos before gonadal differentiation are also sex-dimorphic in size and what genes regulate their growth. We used captive zebra finches (Taeniopygia guttata) whose freshly laid eggs were artificially incubated for 36–40 hours. Analyses controlling for the exact time of incubation of 81 embryos revealed that males were larger than females in terms of Hamburger and Hamilton stage and number of somites. Expression of 15 genes involved in cell cycle regulation, growth, metabolic activity, steroidogenic pathway and stress modulation were measured using RT-PCR in 5 male and 5 female embryos incubated for exactly 36 h. We found that in the presence of equal levels of the growth hormone itself, the faster growth of male embryos is most likely achieved by the overexpression of the growth hormone receptor gene and three other genes responsible for cell cycle regulation and metabolism, all of them located on the Z chromosome. Autosomal genes did not show sex-specific expression, except for the steroidogenic factor 1 which was expressed only in female embryos. To our knowledge this is the first report of sexual size dimorphism before gonadogenesis in birds. The finding suggests that faster growth of early male embryos is conserved through the mammalian and bird phyla, irrespective of their differential sex chromosome systems. pl
dc.subject.en in-vitro pl
dc.subject.en dosage compensation pl
dc.subject.en bovine embryos pl
dc.subject.en developmental rates pl
dc.subject.en cultured in vitro pl
dc.subject.en blastocyst stage pl
dc.subject.en growth-hormone pl
dc.subject.en mouse embryos pl
dc.subject.en cell-growth pl
dc.subject.en expression pl
dc.description.volume 9 pl
dc.description.number 12 pl
dc.identifier.doi 10.1371/journal.pone.0114625 pl
dc.identifier.eissn 1932-6203 pl
dc.title.journal PLoS ONE pl
dc.language.container eng pl
dc.affiliation Wydział Biologii i Nauk o Ziemi : Instytut Nauk o Środowisku pl
dc.subtype Article pl
dc.identifier.articleid e114625 pl
dc.rights.original CC-BY; otwarte czasopismo; ostateczna wersja wydawcy; w momencie opublikowania; 0; pl
dc.identifier.project ROD UJ / P pl
.pointsMNiSW [2014 A]: 40

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Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa