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通过常规染色体染色、C带和rDNA荧光原位杂交对两种缘蝽（半翅目，异翅亚目，缘蝽科）进行核型比较。

A karyotype comparison between two species of bordered plant bugs (Hemiptera, Heteroptera, Largidae) by conventional chromosome staining, C-banding and rDNA-FISH.

作者信息

Salanitro Lucila Belén, Massaccesi Anabella Cecilia, Urbisaglia Santiago, Bressa María José, Chirino Mónica Gabriela

机构信息

Laboratorio de Entomología Aplicada y Forense, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352, Bernal (B1876BXD), Buenos Aires, Argentina.

Grupo de Citogenética de Insectos, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Universitaria, Ciudad Autónoma de Buenos Aires (C1428EHA), Argentina.

出版信息

Comp Cytogenet. 2017 Apr 13;11(2):239-248. doi: 10.3897/CompCytogen.v11i2.11683. eCollection 2017.

DOI:10.3897/CompCytogen.v11i2.11683
PMID:28919962
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5596986/
Abstract

A cytogenetic characterization, including heterochromatin content, and the analysis of the location of rDNA genes, was performed in Blanchard, 1843 and Laporte, 1832. Mitotic and meiotic analyses revealed the same diploid chromosome number 2n = 12 + X0/XX (male/female). Heterochromatin content, very scarce in both species, revealed C-blocks at both ends of autosomes and X chromosome. The most remarkable cytological feature observed between both species was the different chromosome position of the NORs. This analysis allowed us to use the NORs as a cytological marker because two clusters of rDNA genes are located at one end of one pair of autosomes in , whereas a single rDNA cluster is located at one terminal region of the X chromosome in . Taking into account our results and previous data obtained in other heteropteran species, the conventional staining, chromosome bandings, and rDNA-FISH provide important chromosome markers for cytotaxonomy, karyotype evolution, and chromosome structure and organization studies.

摘要

对1843年的布兰查德（Blanchard）和1832年的拉波特（Laporte）进行了细胞遗传学特征分析，包括异染色质含量以及rDNA基因定位分析。有丝分裂和减数分裂分析显示，二者的二倍体染色体数目均为2n = 12 + X0/XX（雄性/雌性）。两种物种的异染色质含量都非常稀少，在常染色体和X染色体的两端均显示出C带。在这两个物种之间观察到的最显著细胞学特征是核仁组织区（NORs）的染色体位置不同。该分析使我们能够将NORs用作细胞学标记，因为在[物种名称1]中，两簇rDNA基因位于一对常染色体的一端，而在[物种名称2]中，单个rDNA簇位于X染色体的一个末端区域。考虑到我们的结果以及之前在其他半翅目物种中获得的数据，常规染色、染色体显带和rDNA荧光原位杂交（FISH）为细胞分类学、核型进化以及染色体结构和组织研究提供了重要的染色体标记。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bfd6/5596986/b0640091ff48/comparative_cytogenetics-11-239-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bfd6/5596986/43324a99cf11/comparative_cytogenetics-11-239-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bfd6/5596986/b140033c6448/comparative_cytogenetics-11-239-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bfd6/5596986/b0640091ff48/comparative_cytogenetics-11-239-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bfd6/5596986/43324a99cf11/comparative_cytogenetics-11-239-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bfd6/5596986/b140033c6448/comparative_cytogenetics-11-239-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bfd6/5596986/b0640091ff48/comparative_cytogenetics-11-239-g003.jpg

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