Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome

Triatomainfestans (2n = 20 A + XY, male) is a blood-sucking bug and the most important vector of Chagas disease in the Southern Cone countries. A cytogenetic analysis of 14 individuals from the Argentine Gran Chaco has revealed the presence of a naturally heterozygous for an autosomal fusion. The fu...

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Autores principales: Poggio, Maria Georgina, Gaspe, Maria Sol, Papeschi, Alba Graciela, Bressa, Maria Jose
Publicado: 2012
Materias:
Autosomal fusion
B chromosome
Heteroptera
Holokinetic chromosomes
Triatoma infestans
anaphase
article
autosome
cytogenetics
fusion gene
heterozygote
karyotype evolution
male
metaphase chromosome
natural population
nonhuman
priority journal
supernumerary chromosome
X chromosome
Y chromosome
Abnormal Karyotype
Animals
Chromosome Banding
Chromosomes, Insect
Male
Mitosis
Spermatogonia
Triatoma
Hemiptera
Reduviidae
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14248581_v139_n1_p44_Poggio
http://hdl.handle.net/20.500.12110/paper_14248581_v139_n1_p44_Poggio
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14248581_v139_n1_p44_Poggio
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spelling paper:paper_14248581_v139_n1_p44_Poggio2023-06-08T16:14:02Z Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome Poggio, Maria Georgina Gaspe, Maria Sol Papeschi, Alba Graciela Bressa, Maria Jose Autosomal fusion B chromosome Heteroptera Holokinetic chromosomes Triatoma infestans anaphase article autosome cytogenetics fusion gene Heteroptera heterozygote karyotype evolution male metaphase chromosome natural population nonhuman priority journal supernumerary chromosome Triatoma infestans X chromosome Y chromosome Abnormal Karyotype Animals Chromosome Banding Chromosomes, Insect Male Mitosis Spermatogonia Triatoma Hemiptera Heteroptera Reduviidae Triatoma infestans Triatomainfestans (2n = 20 A + XY, male) is a blood-sucking bug and the most important vector of Chagas disease in the Southern Cone countries. A cytogenetic analysis of 14 individuals from the Argentine Gran Chaco has revealed the presence of a naturally heterozygous for an autosomal fusion. The fusion heterozygote (2n = 19 A + 1 extra chromosome + XY, male) presented an autosomal trivalent, 8 bivalents, the X and Y sex univalents, and a minute extra chromosome at meiosis I. The autosomal trivalent divided equationally at first anaphase. At metaphase II, cells had 8 autosomes, X and Y sex chromosomes, and an autosomal pseudo-trivalent composed by 3 different-sized chromatids. The orientation of this pseudo-trivalent led to a reductional segregation. The meiotic behaviour of this new chromosome complement was highly regular. The extra chromosome did not affect the segregation of autosomes and sex chromosomes during both meiotic divisions. We propose that the extra chromosome was originated as a product of an autosomal fusion, and it might become a B chromosome. Many authors suggest that karyotype evolution in Heteroptera has proceeded mainly by fusions and fragmentations. The fact that this rearrangement has been found in a natural population of T. infestans and that it shows a regular meiotic behaviour seems to support the suggested hypothesis. Copyright © 2012 S. Karger AG, Basel. Fil:Poggio, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gaspe, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Papeschi, A.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bressa, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14248581_v139_n1_p44_Poggio http://hdl.handle.net/20.500.12110/paper_14248581_v139_n1_p44_Poggio
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Autosomal fusion
B chromosome
Heteroptera
Holokinetic chromosomes
Triatoma infestans
anaphase
article
autosome
cytogenetics
fusion gene
Heteroptera
heterozygote
karyotype evolution
male
metaphase chromosome
natural population
nonhuman
priority journal
supernumerary chromosome
Triatoma infestans
X chromosome
Y chromosome
Abnormal Karyotype
Animals
Chromosome Banding
Chromosomes, Insect
Male
Mitosis
Spermatogonia
Triatoma
Hemiptera
Heteroptera
Reduviidae
Triatoma infestans
spellingShingle Autosomal fusion
B chromosome
Heteroptera
Holokinetic chromosomes
Triatoma infestans
anaphase
article
autosome
cytogenetics
fusion gene
Heteroptera
heterozygote
karyotype evolution
male
metaphase chromosome
natural population
nonhuman
priority journal
supernumerary chromosome
Triatoma infestans
X chromosome
Y chromosome
Abnormal Karyotype
Animals
Chromosome Banding
Chromosomes, Insect
Male
Mitosis
Spermatogonia
Triatoma
Hemiptera
Heteroptera
Reduviidae
Triatoma infestans
Poggio, Maria Georgina
Gaspe, Maria Sol
Papeschi, Alba Graciela
Bressa, Maria Jose
Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome
topic_facet Autosomal fusion
B chromosome
Heteroptera
Holokinetic chromosomes
Triatoma infestans
anaphase
article
autosome
cytogenetics
fusion gene
Heteroptera
heterozygote
karyotype evolution
male
metaphase chromosome
natural population
nonhuman
priority journal
supernumerary chromosome
Triatoma infestans
X chromosome
Y chromosome
Abnormal Karyotype
Animals
Chromosome Banding
Chromosomes, Insect
Male
Mitosis
Spermatogonia
Triatoma
Hemiptera
Heteroptera
Reduviidae
Triatoma infestans
description Triatomainfestans (2n = 20 A + XY, male) is a blood-sucking bug and the most important vector of Chagas disease in the Southern Cone countries. A cytogenetic analysis of 14 individuals from the Argentine Gran Chaco has revealed the presence of a naturally heterozygous for an autosomal fusion. The fusion heterozygote (2n = 19 A + 1 extra chromosome + XY, male) presented an autosomal trivalent, 8 bivalents, the X and Y sex univalents, and a minute extra chromosome at meiosis I. The autosomal trivalent divided equationally at first anaphase. At metaphase II, cells had 8 autosomes, X and Y sex chromosomes, and an autosomal pseudo-trivalent composed by 3 different-sized chromatids. The orientation of this pseudo-trivalent led to a reductional segregation. The meiotic behaviour of this new chromosome complement was highly regular. The extra chromosome did not affect the segregation of autosomes and sex chromosomes during both meiotic divisions. We propose that the extra chromosome was originated as a product of an autosomal fusion, and it might become a B chromosome. Many authors suggest that karyotype evolution in Heteroptera has proceeded mainly by fusions and fragmentations. The fact that this rearrangement has been found in a natural population of T. infestans and that it shows a regular meiotic behaviour seems to support the suggested hypothesis. Copyright © 2012 S. Karger AG, Basel.
author Poggio, Maria Georgina
Gaspe, Maria Sol
Papeschi, Alba Graciela
Bressa, Maria Jose
author_facet Poggio, Maria Georgina
Gaspe, Maria Sol
Papeschi, Alba Graciela
Bressa, Maria Jose
author_sort Poggio, Maria Georgina
title Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome
title_short Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome
title_full Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome
title_fullStr Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome
title_full_unstemmed Cytogenetic study in a mutant of triatoma infestans (hemiptera: Reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome
title_sort cytogenetic study in a mutant of triatoma infestans (hemiptera: reduviidae) carrying a spontaneous autosomal fusion and an extra chromosome
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14248581_v139_n1_p44_Poggio
http://hdl.handle.net/20.500.12110/paper_14248581_v139_n1_p44_Poggio
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AT gaspemariasol cytogeneticstudyinamutantoftriatomainfestanshemipterareduviidaecarryingaspontaneousautosomalfusionandanextrachromosome
AT papeschialbagraciela cytogeneticstudyinamutantoftriatomainfestanshemipterareduviidaecarryingaspontaneousautosomalfusionandanextrachromosome
AT bressamariajose cytogeneticstudyinamutantoftriatomainfestanshemipterareduviidaecarryingaspontaneousautosomalfusionandanextrachromosome
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