Meiotic behavior and fertility of Capsicum interspecific hybrids
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Horticultura Brasileira |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400382 |
Resumo: | ABSTRACT This study was performed to evaluate the meiotic behavior and fertility of four hybrids obtained from the crossing of Capsicum baccatum and its botanical forms with Capsicum chinense and Capsicum frutescens. We aimed to identify the causes of the low fertility in interspecific hybrids involving species from different gene pools of Capsicum. Hybrid flower buds were fixed in fixative solution and the slides were prepared using 1%-acetic carmine solution. Meiosis was observed in all phases and the main meiotic abnormality observed was the complete or partial lack of chromosome pairing, indicating that the species are either genetically distant or that some asynaptic gene was present in the hybrids. Meiotic index (MI), the frequency of unreduced gametes (type 2n), and pollen viability were estimated. MI and pollen viability of the hybrids were low. We concluded that due to the complete or partial lack of chromosome pairing, the species used in the hybrid combinations are genetically distant. We also noticed that the low-fertility hybrids are a consequence of the lack of chromosome homology between the two genomes involved. The hybrids were considered partially sterile since their pollen viability percentage was lower than 50%. |
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Meiotic behavior and fertility of Capsicum interspecific hybridsCapsicum baccatumCapsicum chinenseCapsicum frutescensmeiosismeiotic abnormalitychromosome pairingABSTRACT This study was performed to evaluate the meiotic behavior and fertility of four hybrids obtained from the crossing of Capsicum baccatum and its botanical forms with Capsicum chinense and Capsicum frutescens. We aimed to identify the causes of the low fertility in interspecific hybrids involving species from different gene pools of Capsicum. Hybrid flower buds were fixed in fixative solution and the slides were prepared using 1%-acetic carmine solution. Meiosis was observed in all phases and the main meiotic abnormality observed was the complete or partial lack of chromosome pairing, indicating that the species are either genetically distant or that some asynaptic gene was present in the hybrids. Meiotic index (MI), the frequency of unreduced gametes (type 2n), and pollen viability were estimated. MI and pollen viability of the hybrids were low. We concluded that due to the complete or partial lack of chromosome pairing, the species used in the hybrid combinations are genetically distant. We also noticed that the low-fertility hybrids are a consequence of the lack of chromosome homology between the two genomes involved. The hybrids were considered partially sterile since their pollen viability percentage was lower than 50%.Associação Brasileira de Horticultura2020-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400382Horticultura Brasileira v.38 n.4 2020reponame:Horticultura Brasileirainstname:Associação Brasileira de Horticultura (ABH)instacron:ABH10.1590/s0102-0536202004007info:eu-repo/semantics/openAccessOliveira,Sara I deRibeiro,Elba HMoreira,Nádia FVianna,Larissa SPereira,Telma NSeng2020-12-16T00:00:00Zoai:scielo:S0102-05362020000400382Revistahttp://cms.horticulturabrasileira.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||hortbras@gmail.com1806-99910102-0536opendoar:2020-12-16T00:00Horticultura Brasileira - Associação Brasileira de Horticultura (ABH)false |
dc.title.none.fl_str_mv |
Meiotic behavior and fertility of Capsicum interspecific hybrids |
title |
Meiotic behavior and fertility of Capsicum interspecific hybrids |
spellingShingle |
Meiotic behavior and fertility of Capsicum interspecific hybrids Oliveira,Sara I de Capsicum baccatum Capsicum chinense Capsicum frutescens meiosis meiotic abnormality chromosome pairing |
title_short |
Meiotic behavior and fertility of Capsicum interspecific hybrids |
title_full |
Meiotic behavior and fertility of Capsicum interspecific hybrids |
title_fullStr |
Meiotic behavior and fertility of Capsicum interspecific hybrids |
title_full_unstemmed |
Meiotic behavior and fertility of Capsicum interspecific hybrids |
title_sort |
Meiotic behavior and fertility of Capsicum interspecific hybrids |
author |
Oliveira,Sara I de |
author_facet |
Oliveira,Sara I de Ribeiro,Elba H Moreira,Nádia F Vianna,Larissa S Pereira,Telma NS |
author_role |
author |
author2 |
Ribeiro,Elba H Moreira,Nádia F Vianna,Larissa S Pereira,Telma NS |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Oliveira,Sara I de Ribeiro,Elba H Moreira,Nádia F Vianna,Larissa S Pereira,Telma NS |
dc.subject.por.fl_str_mv |
Capsicum baccatum Capsicum chinense Capsicum frutescens meiosis meiotic abnormality chromosome pairing |
topic |
Capsicum baccatum Capsicum chinense Capsicum frutescens meiosis meiotic abnormality chromosome pairing |
description |
ABSTRACT This study was performed to evaluate the meiotic behavior and fertility of four hybrids obtained from the crossing of Capsicum baccatum and its botanical forms with Capsicum chinense and Capsicum frutescens. We aimed to identify the causes of the low fertility in interspecific hybrids involving species from different gene pools of Capsicum. Hybrid flower buds were fixed in fixative solution and the slides were prepared using 1%-acetic carmine solution. Meiosis was observed in all phases and the main meiotic abnormality observed was the complete or partial lack of chromosome pairing, indicating that the species are either genetically distant or that some asynaptic gene was present in the hybrids. Meiotic index (MI), the frequency of unreduced gametes (type 2n), and pollen viability were estimated. MI and pollen viability of the hybrids were low. We concluded that due to the complete or partial lack of chromosome pairing, the species used in the hybrid combinations are genetically distant. We also noticed that the low-fertility hybrids are a consequence of the lack of chromosome homology between the two genomes involved. The hybrids were considered partially sterile since their pollen viability percentage was lower than 50%. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400382 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400382 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/s0102-0536202004007 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Horticultura |
publisher.none.fl_str_mv |
Associação Brasileira de Horticultura |
dc.source.none.fl_str_mv |
Horticultura Brasileira v.38 n.4 2020 reponame:Horticultura Brasileira instname:Associação Brasileira de Horticultura (ABH) instacron:ABH |
instname_str |
Associação Brasileira de Horticultura (ABH) |
instacron_str |
ABH |
institution |
ABH |
reponame_str |
Horticultura Brasileira |
collection |
Horticultura Brasileira |
repository.name.fl_str_mv |
Horticultura Brasileira - Associação Brasileira de Horticultura (ABH) |
repository.mail.fl_str_mv |
||hortbras@gmail.com |
_version_ |
1754213084662071296 |