首页> 美国卫生研究院文献>Genetics and Molecular Biology >Cytogenetic studies in six species of Scinax (Anura Hylidae) clade Scinax ruber from northern and northeastern Brazil
【2h】

Cytogenetic studies in six species of Scinax (Anura Hylidae) clade Scinax ruber from northern and northeastern Brazil

机译:巴西北部和东北部Scinax(AnuraHylidae)进化枝Scinax ruber的6种物种的细胞遗传学研究

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。
获取外文期刊封面目录资料

摘要

Scinax species are still underrepresented in cytogenetic studies, mainly with respect to populations from northeastern and northern Brazil. In this study, we provide new chromosomal information on Scinax boesemani, S. camposseabrai, S. garbei, S. pachycrus, S. trilineatus and S. x-signatus, all belonging to clade S. ruber. They were collected at two locations in the Caatinga biome (northeastern Brazil) and at one in the Amazon (northern Brazil) biomes. Chromosomes were analyzed by conventional staining, C-banding, Ag-NOR staining, and fluorochrome staining. All species shared a modal diploid value of 2n = 24 and fundamental arm number (FN) of 48. Moreover, both chromosomal size and morphology were similar to other species in this Scinaxclade. C-banding revealed centromeric heterochromatin in all species, along with terminal species-specific C-bands in some species. Active nucleolar organizer regions (Ag-NORs) were identified at 11q in most species, except for S. boesemani and S. garbei (Ag-NORs at interstitial region of 8q). Differing from most anurans, GC-rich regions were not restricted to NORs, but also coincident with some centromeric and terminal C-bands. These data contribute to the cytotaxonomy of Scinax by providing chromosomal markers and demonstrating the occurrence of microstructural rearrangements and inversions on chromosomal evolution of Scinax.
机译:鼻息肉物种在细胞遗传学研究中仍然代表性不足,主要针对巴西东北部和北部的种群。在这项研究中,我们提供了有关Scinax boesemani,S。camposseabrai,S。garbei,S。pachycrus,S。trilineatus和S. x-signatus的所有染色体信息,它们均属于S. ruber进化枝。它们分别在Caatinga生物群落(巴西东北部)和亚马逊生物群落(巴西北部)中的两个地点收集。通过常规染色,C带,Ag-NOR染色和荧光染料染色来分析染色体。所有物种均具有2n = 24的模态二倍体值和48的基本臂数(FN)。此外,染色体大小和形态均与该Scinaxclade中的其他物种相似。 C带显示所有物种的着丝粒异染色质,以及某些物种的末端物种特异性C带。在大多数物种中,活跃的核仁组织者区域(Ag-NORs)在11q处被确定,除了Bossmani和garbei S.(在8q的间隙区域中的Ag-NORs)。与大多数无氧菌不同,富含GC的区域不仅限于NOR,而且与某些着丝粒和末端C带重合。这些数据通过提供染色体标记并证明发生在Scinax染色体进化上的微结构重排和倒置而有助于Scinax的细胞分类学。

著录项

相似文献

  • 外文文献
  • 中文文献
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号