Sexual and unisexual Australian carp gudgeons (Hypseleotris, Gobioidei: Eleotridae): insight from cytogenetics

Zuzana Majtanova, Tariq Ezaz, Petr Rab, Peter Unmack

Research output: Contribution to conference (non-published works)Paper

2 Downloads (Pure)

Abstract

The genus Hypseleotris, the most abundant and the most enigmatic group of native fish in Australia, represents a model system where interspecific hybridization among sympatric produces unisexual lineages behaving reproductively as so-called ‘sexual parasites’. The perpetuation of such lineages requires mating with a sexual congener, despite not passing any of its genes onto progeny. Based on the previous research, there are several puzzling evolutionary outcomes providing a significant challenge to the standard paradigm underpinning sexual parasitism. Here, we present cytogenetic analysis in five sexual species and two hybrid biotypes of Hypseleotris using standard and molecular cytogenetic protocols. We describe significant differences among and inside lineages (diploid chromosome number, chromosome morphologies and variability on the sub-chromosomal level). Moreover we observed unexceptional interindividual variability in males from different lineages. Differences were observed in chromosomal numbers and morphology between metaphases obtained from testes and somatic tissues suggesting unusual system of meiotic division. Our cytogenetic description of this unique unisexual fish species complex helps to disentangle of processes leading to origin and maintenance of uni/sexual lineages and contributes to general understanding of sex evolution.
Original languageEnglish
Pages1-1
Number of pages1
DOIs
Publication statusPublished - 2019
EventXVI European Congress of Ichthyology - Aquatis Hotel, Lausanne, Switzerland
Duration: 2 Sep 20196 Sep 2019

Conference

ConferenceXVI European Congress of Ichthyology
CountrySwitzerland
CityLausanne
Period2/09/196/09/19

Fingerprint

cytogenetics
carp
chromosome morphology
cytogenetic analysis
interspecific hybridization
biotypes
fish
metaphase
chromosome number
testes
parasitism
diploidy
parasites
gender
genes
Eleotridae
Hypseleotris
tissues

Cite this

Majtanova, Zuzana ; Ezaz, Tariq ; Rab, Petr ; Unmack, Peter. / Sexual and unisexual Australian carp gudgeons (Hypseleotris, Gobioidei: Eleotridae): insight from cytogenetics. Paper presented at XVI European Congress of Ichthyology, Lausanne, Switzerland.1 p.
@conference{757d9dc8d04b42beb9669db6a6b77594,
title = "Sexual and unisexual Australian carp gudgeons (Hypseleotris, Gobioidei: Eleotridae): insight from cytogenetics",
abstract = "The genus Hypseleotris, the most abundant and the most enigmatic group of native fish in Australia, represents a model system where interspecific hybridization among sympatric produces unisexual lineages behaving reproductively as so-called ‘sexual parasites’. The perpetuation of such lineages requires mating with a sexual congener, despite not passing any of its genes onto progeny. Based on the previous research, there are several puzzling evolutionary outcomes providing a significant challenge to the standard paradigm underpinning sexual parasitism. Here, we present cytogenetic analysis in five sexual species and two hybrid biotypes of Hypseleotris using standard and molecular cytogenetic protocols. We describe significant differences among and inside lineages (diploid chromosome number, chromosome morphologies and variability on the sub-chromosomal level). Moreover we observed unexceptional interindividual variability in males from different lineages. Differences were observed in chromosomal numbers and morphology between metaphases obtained from testes and somatic tissues suggesting unusual system of meiotic division. Our cytogenetic description of this unique unisexual fish species complex helps to disentangle of processes leading to origin and maintenance of uni/sexual lineages and contributes to general understanding of sex evolution.",
author = "Zuzana Majtanova and Tariq Ezaz and Petr Rab and Peter Unmack",
year = "2019",
doi = "10.3389/conf.fmars.2019.07.00034",
language = "English",
pages = "1--1",
note = "XVI European Congress of Ichthyology ; Conference date: 02-09-2019 Through 06-09-2019",

}

Majtanova, Z, Ezaz, T, Rab, P & Unmack, P 2019, 'Sexual and unisexual Australian carp gudgeons (Hypseleotris, Gobioidei: Eleotridae): insight from cytogenetics' Paper presented at XVI European Congress of Ichthyology, Lausanne, Switzerland, 2/09/19 - 6/09/19, pp. 1-1. https://doi.org/10.3389/conf.fmars.2019.07.00034

Sexual and unisexual Australian carp gudgeons (Hypseleotris, Gobioidei: Eleotridae): insight from cytogenetics. / Majtanova, Zuzana; Ezaz, Tariq; Rab, Petr; Unmack, Peter.

2019. 1-1 Paper presented at XVI European Congress of Ichthyology, Lausanne, Switzerland.

Research output: Contribution to conference (non-published works)Paper

TY - CONF

T1 - Sexual and unisexual Australian carp gudgeons (Hypseleotris, Gobioidei: Eleotridae): insight from cytogenetics

AU - Majtanova, Zuzana

AU - Ezaz, Tariq

AU - Rab, Petr

AU - Unmack, Peter

PY - 2019

Y1 - 2019

N2 - The genus Hypseleotris, the most abundant and the most enigmatic group of native fish in Australia, represents a model system where interspecific hybridization among sympatric produces unisexual lineages behaving reproductively as so-called ‘sexual parasites’. The perpetuation of such lineages requires mating with a sexual congener, despite not passing any of its genes onto progeny. Based on the previous research, there are several puzzling evolutionary outcomes providing a significant challenge to the standard paradigm underpinning sexual parasitism. Here, we present cytogenetic analysis in five sexual species and two hybrid biotypes of Hypseleotris using standard and molecular cytogenetic protocols. We describe significant differences among and inside lineages (diploid chromosome number, chromosome morphologies and variability on the sub-chromosomal level). Moreover we observed unexceptional interindividual variability in males from different lineages. Differences were observed in chromosomal numbers and morphology between metaphases obtained from testes and somatic tissues suggesting unusual system of meiotic division. Our cytogenetic description of this unique unisexual fish species complex helps to disentangle of processes leading to origin and maintenance of uni/sexual lineages and contributes to general understanding of sex evolution.

AB - The genus Hypseleotris, the most abundant and the most enigmatic group of native fish in Australia, represents a model system where interspecific hybridization among sympatric produces unisexual lineages behaving reproductively as so-called ‘sexual parasites’. The perpetuation of such lineages requires mating with a sexual congener, despite not passing any of its genes onto progeny. Based on the previous research, there are several puzzling evolutionary outcomes providing a significant challenge to the standard paradigm underpinning sexual parasitism. Here, we present cytogenetic analysis in five sexual species and two hybrid biotypes of Hypseleotris using standard and molecular cytogenetic protocols. We describe significant differences among and inside lineages (diploid chromosome number, chromosome morphologies and variability on the sub-chromosomal level). Moreover we observed unexceptional interindividual variability in males from different lineages. Differences were observed in chromosomal numbers and morphology between metaphases obtained from testes and somatic tissues suggesting unusual system of meiotic division. Our cytogenetic description of this unique unisexual fish species complex helps to disentangle of processes leading to origin and maintenance of uni/sexual lineages and contributes to general understanding of sex evolution.

UR - http://www.mendeley.com/research/sexual-unisexual-australian-carp-gudgeons-hypseleotris-gobioidei-eleotridae-insight-cytogenetics

U2 - 10.3389/conf.fmars.2019.07.00034

DO - 10.3389/conf.fmars.2019.07.00034

M3 - Paper

SP - 1

EP - 1

ER -