A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max).
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/468651 |
Resumo: | A spontaneous desynaptic mutation, affecting only microsporogenesis and causing pollen sterility, has been detected in BR97-12986H, a line of the official Brazilian soybean breeding program. In this male-sterile, female-fertile mutant, up to metaphase II, the meiotic behavior was similar to that described for the st series of synaptic mutants previously reported in soybean. Besides many univalents, few or total absence of bivalents were recorded in diakinesis. Bivalents presented one or two terminal chiasmata, while univalents retained the sister chromatid cohesion. Bivalents and most univalents congregated at the equatorial metaphase plate, although univalents frequently migrated to the poles prematurely. Laggards resulting from delay in chiasmata terminalization were also recorded. Distinctly different in their behavior from st series soybean mutants, telophase I-originated micronuclei of different sizes organized their own spindle in the second division. This behavior contributed towards an increase in genome fractionation. Several microspores and microcytes of different sizes were recorded at the end of meiosis. Pollen sterility was estimated at 91.2 %. Segregation ratio for sterility in this line and its progenies reached 3:1. Allelism tests with st series of synaptic mutants are in progress. The importance of male-sterile, female-fertile mutations for soybean breeding programs is discussed. |
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A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max).MelhoramentoSojaA spontaneous desynaptic mutation, affecting only microsporogenesis and causing pollen sterility, has been detected in BR97-12986H, a line of the official Brazilian soybean breeding program. In this male-sterile, female-fertile mutant, up to metaphase II, the meiotic behavior was similar to that described for the st series of synaptic mutants previously reported in soybean. Besides many univalents, few or total absence of bivalents were recorded in diakinesis. Bivalents presented one or two terminal chiasmata, while univalents retained the sister chromatid cohesion. Bivalents and most univalents congregated at the equatorial metaphase plate, although univalents frequently migrated to the poles prematurely. Laggards resulting from delay in chiasmata terminalization were also recorded. Distinctly different in their behavior from st series soybean mutants, telophase I-originated micronuclei of different sizes organized their own spindle in the second division. This behavior contributed towards an increase in genome fractionation. Several microspores and microcytes of different sizes were recorded at the end of meiosis. Pollen sterility was estimated at 91.2 %. Segregation ratio for sterility in this line and its progenies reached 3:1. Allelism tests with st series of synaptic mutants are in progress. The importance of male-sterile, female-fertile mutations for soybean breeding programs is discussed.2011-04-10T11:11:11Z2011-04-10T11:11:11Z2003-11-1920022017-07-28T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleHereditas, Lund, v. 136, n. 2, p. 97-103, 2002.http://www.alice.cnptia.embrapa.br/alice/handle/doc/468651engBIONE, N. C. P.PAGLIARINI, M. S.ALMEIDA, L. A. deinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T00:50:42Zoai:www.alice.cnptia.embrapa.br:doc/468651Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T00:50:42falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T00:50:42Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). |
title |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). |
spellingShingle |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). BIONE, N. C. P. Melhoramento Soja |
title_short |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). |
title_full |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). |
title_fullStr |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). |
title_full_unstemmed |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). |
title_sort |
A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max). |
author |
BIONE, N. C. P. |
author_facet |
BIONE, N. C. P. PAGLIARINI, M. S. ALMEIDA, L. A. de |
author_role |
author |
author2 |
PAGLIARINI, M. S. ALMEIDA, L. A. de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
BIONE, N. C. P. PAGLIARINI, M. S. ALMEIDA, L. A. de |
dc.subject.por.fl_str_mv |
Melhoramento Soja |
topic |
Melhoramento Soja |
description |
A spontaneous desynaptic mutation, affecting only microsporogenesis and causing pollen sterility, has been detected in BR97-12986H, a line of the official Brazilian soybean breeding program. In this male-sterile, female-fertile mutant, up to metaphase II, the meiotic behavior was similar to that described for the st series of synaptic mutants previously reported in soybean. Besides many univalents, few or total absence of bivalents were recorded in diakinesis. Bivalents presented one or two terminal chiasmata, while univalents retained the sister chromatid cohesion. Bivalents and most univalents congregated at the equatorial metaphase plate, although univalents frequently migrated to the poles prematurely. Laggards resulting from delay in chiasmata terminalization were also recorded. Distinctly different in their behavior from st series soybean mutants, telophase I-originated micronuclei of different sizes organized their own spindle in the second division. This behavior contributed towards an increase in genome fractionation. Several microspores and microcytes of different sizes were recorded at the end of meiosis. Pollen sterility was estimated at 91.2 %. Segregation ratio for sterility in this line and its progenies reached 3:1. Allelism tests with st series of synaptic mutants are in progress. The importance of male-sterile, female-fertile mutations for soybean breeding programs is discussed. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002 2003-11-19 2011-04-10T11:11:11Z 2011-04-10T11:11:11Z 2017-07-28T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Hereditas, Lund, v. 136, n. 2, p. 97-103, 2002. http://www.alice.cnptia.embrapa.br/alice/handle/doc/468651 |
identifier_str_mv |
Hereditas, Lund, v. 136, n. 2, p. 97-103, 2002. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/468651 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
_version_ |
1794503440131424256 |