蜚蠊目昆虫基因组大小评估：新进展。

Genome size evaluations in cockroaches: new entries.

机构信息

Department of Public Health, Experimental and Forensic Medicine, Histology and Embryology Unit, University of Pavia.

Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia.

出版信息

Eur J Histochem. 2022 Mar 25;66(2):3400. doi: 10.4081/ejh.2022.3400.

DOI:10.4081/ejh.2022.3400

PMID:35332752

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8992379/

Abstract

In this paper, we report genome size (GS) values for nine cockroaches (order Blattodea, families Blattidae, Blaberidae and Ectobiidae, ex Blattelidae,), three of which are original additions to the ten already present in the GS database: the death's head roach (Blaberus craniifer), the Surinam cockroach (Pycnoscelus surinamensis) and the Madeira cockroach (Leucophaea maderae). Regarding the American cockroach (Periplaneta americana), the GS database contains two contrasting values (2.72 vs 3.41 pg); likely, the 2.72 pg value is the correct one as it is strikingly similar to our sperm DNA content evaluation (2.80 ± 0.11 pg). Also, we suggest halving the published GS of the Argentine cockroach Blaptica dubia and the spotted cockroach (the gray cockroach) Nauphoeta cinerea discussing (i) the occurrence of a correlation between increasing 2N chromosome number and GS within the order Blattodea; and (ii) the possible occurrence of a polyploidization phenomenon doubling a basic GS of 0.58 pg of some termite families (superfamily Blattoidea, epifamily Termitoidae).

摘要

本文报告了九种蟑螂（昆虫纲蜚蠊目，蜚蠊科、蟑螂科和蠊科，原蟑螂科）的基因组大小（GS）值，其中三种是 GS 数据库中已有的十种之外的新增种：死亡头蟑螂（Blaberus craniifer）、苏里南蟑螂（Pycnoscelus surinamensis）和马德拉蟑螂（Leucophaea maderae）。关于美洲蟑螂（Periplaneta americana），GS 数据库包含两个相互矛盾的值（2.72 与 3.41 pg）；很可能，2.72 pg 值是正确的，因为它与我们的精子 DNA 含量评估（2.80 ± 0.11 pg）非常相似。此外，我们建议对半发表的阿根廷蟑螂 Blaptica dubia 和斑翅蟑螂（灰色蟑螂）Nauphoeta cinerea 的 GS 值进行修正，讨论了（i）在蜚蠊目内，2N 染色体数与 GS 之间存在相关性；（ii）一些白蚁科（超科 Blattoidea，亚科 Termitoidae）可能存在着使 GS 加倍的多倍化现象，其基本 GS 值为 0.58 pg。