High chromosomal evolutionary dynamics in sleeper gobies(Eleotridae)and notes on disruptive biological factors in Gobiiformes karyotypes(Osteichthyes,Teleostei)  

作　　者：Simião Alefe Soares da Silva Paulo Augusto de Lima-Filho Clóvis Coutinho da Motta-Neto Gideão Wagner Werneck Félix da Costa Marcelo de Bello Cioffi Luiz Antônio Carlos Bertollo Wagner Franco Molina 

机构地区：[1]Departamento de Biologia Celular e Genética,Centro de Biociências,Universidade Federal do Rio Grande do Norte,Natal,RN,59.078-970,Brazil [2]Instituto Federal de Ciência e Tecnologia do Rio Grande do Norte,Santa Cruz,RN,59200-000,Brazil [3]Departamento de Genética e Evolução,Universidade Federal de São Carlos,Rodovia Washington Luís,Km 235,São Carlos,SP,13.565-905,Brazil

出　　处：《Marine Life Science & Technology》2021年第3期293-302,共10页海洋生命科学与技术（英文）

基　　金：The authors thank to the ICMBio/SISBIO(#19135-4)for the authorization in collecting specimens.We are also grateful to Dr.JoséGarcia Júnior for the taxonomic identification of specimens utilized in the study.This work was supported by the Conselho Nacional de Desenvolvimento Cient.ico e Tecnol.gico(CNPq)[#442664/2015-0,#442626/2019-3].

摘　　要：The order Gobiiformes is made up of more than 2200 species,representing one of the most diverse groups among teleost fishes.The biological causes for the tachytelic karyotype evolution of the gobies have not yet been fully studied.Here we expanded cytogenetic data for the Eleotridae family,analyzing the neotropical species Dormitator maculatus,Eleotris pisonis,Erotelis smaragdus,and Guavina guavina.In addition,a meta-analytical approach was followed for elucidating the karyotype diversification versus biological aspects(habitat and egg type)of the Gobiiformes.The species E.smaragdus and E.pisonis present 2n=46 acrocentric chromosomes(NF=46),D.maculatus 2n=46(36sm+4st+6a;NF=86),and G.guavina,the most divergent karyotype,with 2n=52 acrocentric chromosomes(NF=52).Besides numeric and structural diversification in the karyotypes,the mapping of rDNAs and microsatellites also showed noticeable numerical and positional variation,supporting the high chromosomal evolutionary dynamism of these species.In Gobiiformes,karyotype patterns which are more divergent from the basal karyotype(2n=46a)are associated with characteristics less effective to dispersion,such as the benthic habit.These adaptive characteristics,connected with the organization of the repetitive DNA content in the chromosomes,likely play a synergistic role in the remarkable karyotype diversification of this group.

关 键 词：Chromosome evolution Dispersive potential GOBY Karyotype diversification Microsatellites rDNA 

分 类 号：Q95[生物学—动物学]