DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae)

The chromosome complement of Belostoma bifoveolatum, B. dentatum, B. elegans, and B. martini were analyzed by C‐banding and DNA content. The four species share a similar karyotype with 26 + X1X2Y chromosomes (♂) and an equilocal distribution of C‐bands at telomeric regions. The relative amount of C‐...

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Autor principal: Papeschi, A.G.
Formato: JOUR
Materias:
animal cell
article
chromosome polymorphism
dna content
evolution
genetic variability
heterochromatin
insect
karyotype
nonhuman
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00180661_v115_n2_p109_Papeschi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00180661_v115_n2_p109_Papeschi
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spelling todo:paper_00180661_v115_n2_p109_Papeschi2023-10-03T14:15:10Z DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae) Papeschi, A.G. animal cell article chromosome polymorphism dna content evolution genetic variability heterochromatin insect karyotype nonhuman The chromosome complement of Belostoma bifoveolatum, B. dentatum, B. elegans, and B. martini were analyzed by C‐banding and DNA content. The four species share a similar karyotype with 26 + X1X2Y chromosomes (♂) and an equilocal distribution of C‐bands at telomeric regions. The relative amount of C‐banded material varies between 24 % in B. martini to approximately 59 % in the other three species. The DNA content differs significantly among all of them, and no clear correlation is found between DNA content and C‐positive heterochromatin. The karyotype variation detected in this study suggests that several chromosomal changes took place during the evolution of the Belostomatidae, involving C‐positive heterochromatin as well as C‐negative chromatin. It is also suggested that a telomeric pattern of heterochromatin distribution is a common feature of heteropteran chromosomes, and it is probably related to their holokinetic nature. © 1991 Mendelian Society of Lund Fil:Papeschi, A.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00180661_v115_n2_p109_Papeschi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic animal cell
article
chromosome polymorphism
dna content
evolution
genetic variability
heterochromatin
insect
karyotype
nonhuman
spellingShingle animal cell
article
chromosome polymorphism
dna content
evolution
genetic variability
heterochromatin
insect
karyotype
nonhuman
Papeschi, A.G.
DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae)
topic_facet animal cell
article
chromosome polymorphism
dna content
evolution
genetic variability
heterochromatin
insect
karyotype
nonhuman
description The chromosome complement of Belostoma bifoveolatum, B. dentatum, B. elegans, and B. martini were analyzed by C‐banding and DNA content. The four species share a similar karyotype with 26 + X1X2Y chromosomes (♂) and an equilocal distribution of C‐bands at telomeric regions. The relative amount of C‐banded material varies between 24 % in B. martini to approximately 59 % in the other three species. The DNA content differs significantly among all of them, and no clear correlation is found between DNA content and C‐positive heterochromatin. The karyotype variation detected in this study suggests that several chromosomal changes took place during the evolution of the Belostomatidae, involving C‐positive heterochromatin as well as C‐negative chromatin. It is also suggested that a telomeric pattern of heterochromatin distribution is a common feature of heteropteran chromosomes, and it is probably related to their holokinetic nature. © 1991 Mendelian Society of Lund
format JOUR
author Papeschi, A.G.
author_facet Papeschi, A.G.
author_sort Papeschi, A.G.
title DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae)
title_short DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae)
title_full DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae)
title_fullStr DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae)
title_full_unstemmed DNA content and heterochromatin variation in species of Belostoma (Heteroptera, Belostomatidae)
title_sort dna content and heterochromatin variation in species of belostoma (heteroptera, belostomatidae)
url http://hdl.handle.net/20.500.12110/paper_00180661_v115_n2_p109_Papeschi
work_keys_str_mv AT papeschiag dnacontentandheterochromatinvariationinspeciesofbelostomaheteropterabelostomatidae
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