Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani

Six populations of Sinipta dalmani from the provinces of Buenos Aires and Entre Rios (Argentina) were analyzed. The populations of "El Palmar" National Park (Entre Rios) were polymorphic for pericentric inversions in pairs M4 and M7 and for a centric fusion involving pair M5 and the X chro...

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Detalles Bibliográficos
Autor principal: Remis, Maria Isabel
Publicado: 2008
Materias:
Centric fusion
Chiasma conditions
Grasshopper
Pericentric inversion
animal genetics
Argentina
article
chromosome analysis
chromosome chiasm
chromosome rearrangement
controlled study
gene frequency
gene fusion
genetic linkage
genetic polymorphism
genetic recombination
genetic variability
geographic distribution
grasshopper
heterozygosity
homozygosity
nonhuman
Sinipta dalmani
X chromosome
Schistocerca americana
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14154757_v31_n1_p42_Remis
http://hdl.handle.net/20.500.12110/paper_14154757_v31_n1_p42_Remis
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14154757_v31_n1_p42_Remis
record_format dspace
spelling paper:paper_14154757_v31_n1_p42_Remis2023-06-08T16:13:29Z Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani Remis, Maria Isabel Centric fusion Chiasma conditions Grasshopper Pericentric inversion animal genetics Argentina article chromosome analysis chromosome chiasm chromosome rearrangement controlled study gene frequency gene fusion genetic linkage genetic polymorphism genetic recombination genetic variability geographic distribution grasshopper heterozygosity homozygosity nonhuman Sinipta dalmani X chromosome Schistocerca americana Sinipta dalmani Six populations of Sinipta dalmani from the provinces of Buenos Aires and Entre Rios (Argentina) were analyzed. The populations of "El Palmar" National Park (Entre Rios) were polymorphic for pericentric inversions in pairs M4 and M7 and for a centric fusion involving pair M5 and the X chromosome. The M4 inversion remained similar over time and the karyomorphic frequencies did not depart from those expected according to the Hardy-Weinberg equilibrium. The analysis of chiasma frequency and distribution showed clear intra- and interchromosome effects of the different chromosome rearrangements. Both inversions and centric fusions were related with total or partial crossing over restriction in heterozygous condition, leading to a genetic differentiation between rearranged and non-rearranged chromosomes. The chromosome polymorphisms analyzed herein were associated with an increase in the number of terminal chiasmata both in the rearranged chromosomes (heterozygous centric fusion and homozygous M4 inversion) and in the other chromosomes (M4 inversion). Our results showed that the chromosome polymorphisms in S. dalmani may be associated with a significant decrease in genetic recombination, which may explain in part their maintenance in some areas of its geographical distribution. Copyright by the Brazilian Society of Genetics. Fil:Remis, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14154757_v31_n1_p42_Remis http://hdl.handle.net/20.500.12110/paper_14154757_v31_n1_p42_Remis
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Centric fusion
Chiasma conditions
Grasshopper
Pericentric inversion
animal genetics
Argentina
article
chromosome analysis
chromosome chiasm
chromosome rearrangement
controlled study
gene frequency
gene fusion
genetic linkage
genetic polymorphism
genetic recombination
genetic variability
geographic distribution
grasshopper
heterozygosity
homozygosity
nonhuman
Sinipta dalmani
X chromosome
Schistocerca americana
Sinipta dalmani
spellingShingle Centric fusion
Chiasma conditions
Grasshopper
Pericentric inversion
animal genetics
Argentina
article
chromosome analysis
chromosome chiasm
chromosome rearrangement
controlled study
gene frequency
gene fusion
genetic linkage
genetic polymorphism
genetic recombination
genetic variability
geographic distribution
grasshopper
heterozygosity
homozygosity
nonhuman
Sinipta dalmani
X chromosome
Schistocerca americana
Sinipta dalmani
Remis, Maria Isabel
Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani
topic_facet Centric fusion
Chiasma conditions
Grasshopper
Pericentric inversion
animal genetics
Argentina
article
chromosome analysis
chromosome chiasm
chromosome rearrangement
controlled study
gene frequency
gene fusion
genetic linkage
genetic polymorphism
genetic recombination
genetic variability
geographic distribution
grasshopper
heterozygosity
homozygosity
nonhuman
Sinipta dalmani
X chromosome
Schistocerca americana
Sinipta dalmani
description Six populations of Sinipta dalmani from the provinces of Buenos Aires and Entre Rios (Argentina) were analyzed. The populations of "El Palmar" National Park (Entre Rios) were polymorphic for pericentric inversions in pairs M4 and M7 and for a centric fusion involving pair M5 and the X chromosome. The M4 inversion remained similar over time and the karyomorphic frequencies did not depart from those expected according to the Hardy-Weinberg equilibrium. The analysis of chiasma frequency and distribution showed clear intra- and interchromosome effects of the different chromosome rearrangements. Both inversions and centric fusions were related with total or partial crossing over restriction in heterozygous condition, leading to a genetic differentiation between rearranged and non-rearranged chromosomes. The chromosome polymorphisms analyzed herein were associated with an increase in the number of terminal chiasmata both in the rearranged chromosomes (heterozygous centric fusion and homozygous M4 inversion) and in the other chromosomes (M4 inversion). Our results showed that the chromosome polymorphisms in S. dalmani may be associated with a significant decrease in genetic recombination, which may explain in part their maintenance in some areas of its geographical distribution. Copyright by the Brazilian Society of Genetics.
author Remis, Maria Isabel
author_facet Remis, Maria Isabel
author_sort Remis, Maria Isabel
title Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani
title_short Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani
title_full Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani
title_fullStr Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani
title_full_unstemmed Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani
title_sort chromosome polymorphisms in natural populations of the south american grasshopper sinipta dalmani
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14154757_v31_n1_p42_Remis
http://hdl.handle.net/20.500.12110/paper_14154757_v31_n1_p42_Remis
work_keys_str_mv AT remismariaisabel chromosomepolymorphismsinnaturalpopulationsofthesouthamericangrasshoppersiniptadalmani
_version_ 1768546223424274432

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