Abstract

In parthenogenetic hybrid Darevskia armeniaca species, the development of early oogenesis and early meiosis were analyzed. It has been shown for the first time that the number of synаptonemal complexes (SCs) of bivalents during the stages of early pachуtena–diplotena of the meiotic prophase 1 is constantly equal to the haploid number, 19. The SC karyotype is presented. The results of comparative molecular–cytogenetic (C/CMA₃/DAPI) analysis of the mitotic chromosomes (2n = 38: 34A + 2m + Zw-sex chromosomes) of parthenogenetic females and of the meiotic Zw-sex chromosomes (n = 19 bivalents) of a male D. armeniaca specimen with sex inversion have been presented. Finally, the results obtained demonstrate the absence of premeiotic endoreplication of chromosomes, standard early stages of meiosis, and the formation of the haploid number of SC-bivalents (n = 19) of homeological chromosomes in D. armeniaca.

中文翻译：

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孤雌生殖物种Darevskia armeniaca（蜘蛛科）的卵子发生（减数分裂前期1）和有丝分裂染色体

摘要

在孤雌生殖杂种Darevskia armeniaca物种中，分析了早期卵子发生和早期减数分裂的发展。首次表明，在减数分裂前期 1 的早期 pachуtena-diplotena 阶段，二价物的联会复合物 (SCs) 的数量始终等于单倍体数 19。呈现了 SC 核型。单性雌性和减数分裂 Zw -性染色体 ( n = 19 ) 的有丝分裂染色体 (2 n = 38: 34A + 2m + Zw 性染色体)的比较分子细胞遗传学 (C/CMA ₃ /DAPI) 分析结果二价体）雄性D. armeniaca已呈现性别倒置的标本。最后，获得的结果表明，在D. armeniaca中没有染色体的减数分裂前内复制、减数分裂的标准早期阶段以及同源染色体SC-二价体 ( n = 19)的单倍体数量的形成。