PMID- 32952902
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20211119
IS  - 1993-0771 (Print)
IS  - 1993-078X (Electronic)
IS  - 1993-0771 (Linking)
VI  - 14
IP  - 3
DP  - 2020
TI  - Rapid chromosomal evolution in the bush-cricket Gonatoxia helleri Hemp, 2016 
      (Orthoptera, Phaneropterinae).
PG  - 417-435
LID - 10.3897/CompCytogen.v14i3.54422 [doi]
AB  - Gonatoxia helleri Hemp, 2016 is one of the most widespread bush-crickets of the 
      genus Gonatoxia Karsch, 1889 in East Africa. This species with seven large 
      chromosomes (2nmale symbol = 7) differs from other representatives of the genus Gonatoxia 
      drastically by its reduced chromosome number, the asymmetrical karyotype 
      including karyomorphs rarely found in tettigoniids, as well as in irregularities 
      in the course of meiosis. To better understand the origin of such an exceptional 
      karyotype, chromosomes of 29 specimens from four populations/localities were 
      studied using classical techniques, such as C-banding, silver impregnation, 
      fluorochrome double staining and fluorescence in situ hybridization (FISH) 
      technique with 18S rDNA and (TTAGG) (n) telomeric probes. FISH showed many 18S 
      rDNA loci as well as interstitial telomeric sequences, where chromosome 
      morphology varied in these components in terms of quantity and distribution. The 
      18S rDNA loci coincided with active NORs and C-banding patterns. We suggest that 
      a combination of Robertsonian rearrangements and/or multiple common tandem 
      fusions involving the same chromosomes contributed to the formation of this 
      karyotype/karyomorphs. The results are the first step towards a better 
      understanding of chromosomal reorganization and evolution within the genus 
      Gonatoxia. Low chromosome number, together with the incidence of chromosomal 
      polymorphism that is higher in G. helleri than previously reported in 
      bush-crickets, implies that this species can be a valuable new model for 
      cytogenetic and speciation studies. Our findings suggest that chromosomal 
      translocations lead to diversification and speciation in this species and could 
      be the driving force of adaptive radiation.
FAU - Warchalowska-Sliwa, Elzbieta
AU  - Warchalowska-Sliwa E
AD  - Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, 
      Slawkowska 17, 31-016 Krakow, Poland Polish Academy of Sciences Krakow Poland.
FAU - Grzywacz, Beata
AU  - Grzywacz B
AD  - Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, 
      Slawkowska 17, 31-016 Krakow, Poland Polish Academy of Sciences Krakow Poland.
FAU - Maryanska-Nadachowska, Anna
AU  - Maryanska-Nadachowska A
AD  - Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, 
      Slawkowska 17, 31-016 Krakow, Poland Polish Academy of Sciences Krakow Poland.
FAU - Heller, Klaus-Gerhard
AU  - Heller KG
AUID- ORCID: 0000-0002-3331-3228
AD  - Magdeburg, Germany Unaffiliated Magdeburg Germany.
FAU - Hemp, Claudia
AU  - Hemp C
AD  - University of Bayreuth, Dept. Plant Systematics, Bayreuth, Germany University of 
      Bayreuth Bayreuth Germany.
LA  - eng
PT  - Journal Article
DEP - 20200828
PL  - Bulgaria
TA  - Comp Cytogenet
JT  - Comparative cytogenetics
JID - 101503807
PMC - PMC7473956
OTO - NOTNLM
OT  - Phaneropterinae
OT  - 18S rDNA
OT  - C-banding
OT  - FISH
OT  - NOR
OT  - Tanzania
OT  - adaptive radiation
OT  - chromosome rearrangements
OT  - fluorochrome staining
OT  - telomeric DNA
EDAT- 2020/09/22 06:00
MHDA- 2020/09/22 06:01
PMCR- 2020/08/28
CRDT- 2020/09/21 06:07
PHST- 2020/05/18 00:00 [received]
PHST- 2020/07/27 00:00 [accepted]
PHST- 2020/09/21 06:07 [entrez]
PHST- 2020/09/22 06:00 [pubmed]
PHST- 2020/09/22 06:01 [medline]
PHST- 2020/08/28 00:00 [pmc-release]
AID - 54422 [pii]
AID - 10.3897/CompCytogen.v14i3.54422 [doi]
PST - epublish
SO  - Comp Cytogenet. 2020 Aug 28;14(3):417-435. doi: 10.3897/CompCytogen.v14i3.54422. 
      eCollection 2020.