Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae)
B chromosomes are supernumerary elements present in about 15% of eukaryotic species and are most frequently heterochromatic, behave parasitically, show a transmission rate higher than standard (A) chromosomes, and can provoke harmful effects on carriers. In the current work, Prochilodus lineatus ind...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Sociedade Brasileira de Genética
2011-01-01
|
Series: | Genetics and Molecular Biology |
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200009 |
id |
doaj-27359e11c076499b8585a614dd3ecd8a |
---|---|
record_format |
Article |
spelling |
doaj-27359e11c076499b8585a614dd3ecd8a2020-11-25T02:18:00ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1415-47571678-46852011-01-01342220224Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae)Tatiana Aparecida VoltolinJosé Augusto SenhoriniFausto ForestiJehud BortolozziFábio Porto-ForestiB chromosomes are supernumerary elements present in about 15% of eukaryotic species and are most frequently heterochromatic, behave parasitically, show a transmission rate higher than standard (A) chromosomes, and can provoke harmful effects on carriers. In the current work, Prochilodus lineatus individuals carrying eight and nine B chromosomes were obtained by induced crossing performed involving breeders with different B chromosome numbers in their cells. The high B chromosome numbers found in the offspring were recorded for the first time in this species. The use of cytogenetic techniques applied in the present study revealed that regardless of the increase in number of B chromosomes in the genome of these individuals, those elements did not presented active genes, and showed their normal heterochromatic characteristic.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200009supernumerary chromosomeheterochromatic chromosomecross-fertilization |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tatiana Aparecida Voltolin José Augusto Senhorini Fausto Foresti Jehud Bortolozzi Fábio Porto-Foresti |
spellingShingle |
Tatiana Aparecida Voltolin José Augusto Senhorini Fausto Foresti Jehud Bortolozzi Fábio Porto-Foresti Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae) Genetics and Molecular Biology supernumerary chromosome heterochromatic chromosome cross-fertilization |
author_facet |
Tatiana Aparecida Voltolin José Augusto Senhorini Fausto Foresti Jehud Bortolozzi Fábio Porto-Foresti |
author_sort |
Tatiana Aparecida Voltolin |
title |
Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae) |
title_short |
Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae) |
title_full |
Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae) |
title_fullStr |
Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae) |
title_full_unstemmed |
Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae) |
title_sort |
intraspecific crosses resulting in the first occurrence of eight and nine b chromosomes in prochilodus lineatus (characiformes, prochilodontidae) |
publisher |
Sociedade Brasileira de Genética |
series |
Genetics and Molecular Biology |
issn |
1415-4757 1678-4685 |
publishDate |
2011-01-01 |
description |
B chromosomes are supernumerary elements present in about 15% of eukaryotic species and are most frequently heterochromatic, behave parasitically, show a transmission rate higher than standard (A) chromosomes, and can provoke harmful effects on carriers. In the current work, Prochilodus lineatus individuals carrying eight and nine B chromosomes were obtained by induced crossing performed involving breeders with different B chromosome numbers in their cells. The high B chromosome numbers found in the offspring were recorded for the first time in this species. The use of cytogenetic techniques applied in the present study revealed that regardless of the increase in number of B chromosomes in the genome of these individuals, those elements did not presented active genes, and showed their normal heterochromatic characteristic. |
topic |
supernumerary chromosome heterochromatic chromosome cross-fertilization |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200009 |
work_keys_str_mv |
AT tatianaaparecidavoltolin intraspecificcrossesresultinginthefirstoccurrenceofeightandninebchromosomesinprochiloduslineatuscharaciformesprochilodontidae AT joseaugustosenhorini intraspecificcrossesresultinginthefirstoccurrenceofeightandninebchromosomesinprochiloduslineatuscharaciformesprochilodontidae AT faustoforesti intraspecificcrossesresultinginthefirstoccurrenceofeightandninebchromosomesinprochiloduslineatuscharaciformesprochilodontidae AT jehudbortolozzi intraspecificcrossesresultinginthefirstoccurrenceofeightandninebchromosomesinprochiloduslineatuscharaciformesprochilodontidae AT fabioportoforesti intraspecificcrossesresultinginthefirstoccurrenceofeightandninebchromosomesinprochiloduslineatuscharaciformesprochilodontidae |
_version_ |
1724883774800396288 |