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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
23/05/2001 |
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Data da última atualização: |
23/05/2001 |
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Autoria: |
MESQUITA NETO, F. P.; SILVA, M. F. F. |
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Título: |
Produtos não madeiraveis de florestas secundárias (capoeiras) na micro região Brangantina. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
In: CONGRESSO E EXPOSIÇÃO INTERNACIONAL SOBRE FLORESTAS, 6., 2000, Porto Seguro. Resumos técnicos. Rio de Janeiro: Instituto Ambiental Biosfera, 2000. p.416-417. |
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Idioma: |
Português |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00503naa a2200121 a 4500
001 1301744
005 2001-05-23
008 2000 bl uuuu u00u1 u #d
100 1 $aMESQUITA NETO, F. P.
245 $aProdutos não madeiraveis de florestas secundárias (capoeiras) na micro região Brangantina.
260 $c2000
700 1 $aSILVA, M. F. F.
773 $tIn: CONGRESSO E EXPOSIÇÃO INTERNACIONAL SOBRE FLORESTAS, 6., 2000, Porto Seguro. Resumos técnicos. Rio de Janeiro: Instituto Ambiental Biosfera, 2000. p.416-417.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
23/11/2016 |
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Data da última atualização: |
06/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
PAULA, C. M. P.; FIGUEIREDO, K. G.; SOUZA SOBRINHO, F. de; BENITES, F. R. G.; DAVIDE, L. C.; TECHIO, V. H. |
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Afiliação: |
C.M.P. Paula, UFLA; K. G. Figueiredo, UFLA; FAUSTO DE SOUZA SOBRINHO, CNPGL; FLAVIO RODRIGO GANDOLFI BENITES, CNPGL; L. C. Davide, UFLA; V. H. Techio, UFLA. |
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Título: |
Microsporogenesis analysis validates the use of artificially tetraploidized Brachiaria ruziziensis in breeding programs. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 15, n. 3, gmr.15038737, 2016. |
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DOI: |
https://doi.org/10.4238/gmr.15038737 |
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Idioma: |
Inglês |
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Conteúdo: |
The genus Brachiaria contains species that have great economic importance in the Brazilian agricultural sector, as they enable cattle ranching on acid and poor soils with species that are resistant to spittlebugs and form crop-livestock-forest integration systems. The genus mainly consists of tetraploid (2n = 4x = 36) and apomictic species such as B. decumbens and B. brizantha. Sexuality is found in diploid species (2n = 2x = 18) such as B. ruziziensis. Interspecific hybridization between species of interest is possible by the artificial tetraploidization of B. ruziziensis and the subsequent hybridization with genotypes of B. brizantha and B. decumbens. Therefore, tetraploidized plants have to have normal meiosis or low rates of irregularities, as well as produce viable pollen grains. The objective of this study was to compare meiosis and pollen grain viability and morphology in artificially tetraploidized B. ruziziensis with that of descendants generated from crossing and selfing. The frequency of meiotic abnormalities ranged from 4.43 to 11%, and pollen viability ranged from 61 to 85%. Abnormalities were detected from prophase I to the tetrad stage with a variable frequency between the genotypes. The meiotic behavior of the artificially tetraploidized plants was little affected, and the pollen viability of the genotypes was high. Regarding pollen grain ultrastructure, there were no variations or morphological changes in the different genotypes. The genotypes have meiotic stability and high pollen viability, and can be incorporated into Brachiaria breeding programs. MenosThe genus Brachiaria contains species that have great economic importance in the Brazilian agricultural sector, as they enable cattle ranching on acid and poor soils with species that are resistant to spittlebugs and form crop-livestock-forest integration systems. The genus mainly consists of tetraploid (2n = 4x = 36) and apomictic species such as B. decumbens and B. brizantha. Sexuality is found in diploid species (2n = 2x = 18) such as B. ruziziensis. Interspecific hybridization between species of interest is possible by the artificial tetraploidization of B. ruziziensis and the subsequent hybridization with genotypes of B. brizantha and B. decumbens. Therefore, tetraploidized plants have to have normal meiosis or low rates of irregularities, as well as produce viable pollen grains. The objective of this study was to compare meiosis and pollen grain viability and morphology in artificially tetraploidized B. ruziziensis with that of descendants generated from crossing and selfing. The frequency of meiotic abnormalities ranged from 4.43 to 11%, and pollen viability ranged from 61 to 85%. Abnormalities were detected from prophase I to the tetrad stage with a variable frequency between the genotypes. The meiotic behavior of the artificially tetraploidized plants was little affected, and the pollen viability of the genotypes was high. Regarding pollen grain ultrastructure, there were no variations or morphological changes in the different genotypes. The genotypes have meiotic s... Mostrar Tudo |
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Palavras-Chave: |
Pollen grain. |
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Thesaurus NAL: |
breeding; forage; meiosis; polyploidy. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/150421/1/Cnpgl-2016-GenMolRes-Microsporogenesis.pdf
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Marc: |
LEADER 02379naa a2200253 a 4500
001 2056860
005 2024-02-06
008 2016 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4238/gmr.15038737$2DOI
100 1 $aPAULA, C. M. P.
245 $aMicrosporogenesis analysis validates the use of artificially tetraploidized Brachiaria ruziziensis in breeding programs.$h[electronic resource]
260 $c2016
520 $aThe genus Brachiaria contains species that have great economic importance in the Brazilian agricultural sector, as they enable cattle ranching on acid and poor soils with species that are resistant to spittlebugs and form crop-livestock-forest integration systems. The genus mainly consists of tetraploid (2n = 4x = 36) and apomictic species such as B. decumbens and B. brizantha. Sexuality is found in diploid species (2n = 2x = 18) such as B. ruziziensis. Interspecific hybridization between species of interest is possible by the artificial tetraploidization of B. ruziziensis and the subsequent hybridization with genotypes of B. brizantha and B. decumbens. Therefore, tetraploidized plants have to have normal meiosis or low rates of irregularities, as well as produce viable pollen grains. The objective of this study was to compare meiosis and pollen grain viability and morphology in artificially tetraploidized B. ruziziensis with that of descendants generated from crossing and selfing. The frequency of meiotic abnormalities ranged from 4.43 to 11%, and pollen viability ranged from 61 to 85%. Abnormalities were detected from prophase I to the tetrad stage with a variable frequency between the genotypes. The meiotic behavior of the artificially tetraploidized plants was little affected, and the pollen viability of the genotypes was high. Regarding pollen grain ultrastructure, there were no variations or morphological changes in the different genotypes. The genotypes have meiotic stability and high pollen viability, and can be incorporated into Brachiaria breeding programs.
650 $abreeding
650 $aforage
650 $ameiosis
650 $apolyploidy
653 $aPollen grain
700 1 $aFIGUEIREDO, K. G.
700 1 $aSOUZA SOBRINHO, F. de
700 1 $aBENITES, F. R. G.
700 1 $aDAVIDE, L. C.
700 1 $aTECHIO, V. H.
773 $tGenetics and Molecular Research$gv. 15, n. 3, gmr.15038737, 2016.
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Embrapa Gado de Leite (CNPGL) |
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