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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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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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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
09/05/2012 |
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Data da última atualização: |
20/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
MAIA, M. da S.; BICUDO, S. D.; AZEVEDO, H. C.; SICHERLE, C. C.; SOUSA, D. B. de; RODELLO, L. |
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Afiliação: |
MARCIANE DA SILVA MAIA, CPATSA; SONY DIMAS BICUDO, USP; HYMERSON COSTA AZEVEDO; CARMEN CECILIA SICHERLE; DANIEL BARTOLI DE SOUSA; LEANDRO RODELLO, USP. |
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Título: |
Motility and viability of ram sperm cryopreserved in a Tris-egg yolk extender supplemented with anti-oxidants. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Small Ruminant Research, v. 85, p. 85-90, 2009. |
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DOI: |
10.1016/j.smallrumres.2009.07.001 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate the effects of the addition of the anti-oxidants Trolox and catalase to a ram semen cryopreservation extender, on the basis of post-thaw sperm motility, plasma membrane integrity, acrosomal membrane integrity and mitochondrial membrane potential. Semen from 23 Santa Inês rams was collected using an artificial vagina, and one ejaculate from each ram was evaluated and included in the study. Semen sampleswere diluted to a concentration of 400×106 cells/ml in Tris-egg yolk extender (control) or the same extender supplemented with 50M Trolox/108 sperm (TRO), 50g catalase/ml (CAT) or a combination of Trolox and catalase (TROCAT). The semen was loaded into 0.25 ml straws, cooled and frozen in a programmable freezer and subsequently stored in liquid nitrogen. Frozen straws were thawed in a water bath for sperm evaluation. Post-thaw sperm motility characteristics were determined by CASA, and plasma membrane integrity, acrosome integrity and mitochondrial membrane potential were assessed using PI/FITC-PSA/JC-1 probes. Total sperm motility was significantly higher (P < 0.05) in the control (72.0±1.5%) and in the samples in which catalase was included in the extender (CAT = 69.0±1.5%), compared to samples containing only Trolox (TRO= 65.0±1.5%) or Trolox in combination with catalase (TROCAT = 61.0±1.5%). Progressive motility was significantly (P < 0.05) higher in the CAT extender (31.0±1.0%) than in the TRO (26.0±1.1%) and TROCAT (27.0±1.1%) supplemented extenders. Catalase supplementation resulted in a significantly (P < 0.05) higher percentage of viable sperm (35.5±1.3%) following cryopreservation, than the control (29.9±1.3%) and TROCAT (28.1±1.3%) supplementation. Anti-oxidant supplementation did not improve mitochondrial activity. The total number of sperm showing a high mitochondrial membrane potential was low in all treatments. The percentage of viable sperm was positively related with total sperm motility, progressive motility and rapid movement, while a negative correlation was observed with the percentage of slow and static sperm. Results indicate that supplementation of the extender with the anti-oxidant catalase improves sperm viability and, to a lesser extent, the progressive motility of ram sperm after cryopreservation in a Tris-egg yolk extender. MenosThe objective of this study was to evaluate the effects of the addition of the anti-oxidants Trolox and catalase to a ram semen cryopreservation extender, on the basis of post-thaw sperm motility, plasma membrane integrity, acrosomal membrane integrity and mitochondrial membrane potential. Semen from 23 Santa Inês rams was collected using an artificial vagina, and one ejaculate from each ram was evaluated and included in the study. Semen sampleswere diluted to a concentration of 400×106 cells/ml in Tris-egg yolk extender (control) or the same extender supplemented with 50M Trolox/108 sperm (TRO), 50g catalase/ml (CAT) or a combination of Trolox and catalase (TROCAT). The semen was loaded into 0.25 ml straws, cooled and frozen in a programmable freezer and subsequently stored in liquid nitrogen. Frozen straws were thawed in a water bath for sperm evaluation. Post-thaw sperm motility characteristics were determined by CASA, and plasma membrane integrity, acrosome integrity and mitochondrial membrane potential were assessed using PI/FITC-PSA/JC-1 probes. Total sperm motility was significantly higher (P < 0.05) in the control (72.0±1.5%) and in the samples in which catalase was included in the extender (CAT = 69.0±1.5%), compared to samples containing only Trolox (TRO= 65.0±1.5%) or Trolox in combination with catalase (TROCAT = 61.0±1.5%). Progressive motility was significantly (P < 0.05) higher in the CAT extender (31.0±1.0%) than in the TRO (26.0±1.1%) and TROCAT (27.0±1.1%) s... Mostrar Tudo |
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Palavras-Chave: |
Anti-oxidantes; Plasma membrane integrity; Ram semen; Sêmen ovino. |
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Thesagro: |
Esperma; Ovino; Produção animal. |
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Thesaurus NAL: |
Animal production. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03206naa a2200289 a 4500
001 1924155
005 2015-03-20
008 2009 bl uuuu u00u1 u #d
024 7 $a10.1016/j.smallrumres.2009.07.001$2DOI
100 1 $aMAIA, M. da S.
245 $aMotility and viability of ram sperm cryopreserved in a Tris-egg yolk extender supplemented with anti-oxidants.$h[electronic resource]
260 $c2009
520 $aThe objective of this study was to evaluate the effects of the addition of the anti-oxidants Trolox and catalase to a ram semen cryopreservation extender, on the basis of post-thaw sperm motility, plasma membrane integrity, acrosomal membrane integrity and mitochondrial membrane potential. Semen from 23 Santa Inês rams was collected using an artificial vagina, and one ejaculate from each ram was evaluated and included in the study. Semen sampleswere diluted to a concentration of 400×106 cells/ml in Tris-egg yolk extender (control) or the same extender supplemented with 50M Trolox/108 sperm (TRO), 50g catalase/ml (CAT) or a combination of Trolox and catalase (TROCAT). The semen was loaded into 0.25 ml straws, cooled and frozen in a programmable freezer and subsequently stored in liquid nitrogen. Frozen straws were thawed in a water bath for sperm evaluation. Post-thaw sperm motility characteristics were determined by CASA, and plasma membrane integrity, acrosome integrity and mitochondrial membrane potential were assessed using PI/FITC-PSA/JC-1 probes. Total sperm motility was significantly higher (P < 0.05) in the control (72.0±1.5%) and in the samples in which catalase was included in the extender (CAT = 69.0±1.5%), compared to samples containing only Trolox (TRO= 65.0±1.5%) or Trolox in combination with catalase (TROCAT = 61.0±1.5%). Progressive motility was significantly (P < 0.05) higher in the CAT extender (31.0±1.0%) than in the TRO (26.0±1.1%) and TROCAT (27.0±1.1%) supplemented extenders. Catalase supplementation resulted in a significantly (P < 0.05) higher percentage of viable sperm (35.5±1.3%) following cryopreservation, than the control (29.9±1.3%) and TROCAT (28.1±1.3%) supplementation. Anti-oxidant supplementation did not improve mitochondrial activity. The total number of sperm showing a high mitochondrial membrane potential was low in all treatments. The percentage of viable sperm was positively related with total sperm motility, progressive motility and rapid movement, while a negative correlation was observed with the percentage of slow and static sperm. Results indicate that supplementation of the extender with the anti-oxidant catalase improves sperm viability and, to a lesser extent, the progressive motility of ram sperm after cryopreservation in a Tris-egg yolk extender.
650 $aAnimal production
650 $aEsperma
650 $aOvino
650 $aProdução animal
653 $aAnti-oxidantes
653 $aPlasma membrane integrity
653 $aRam semen
653 $aSêmen ovino
700 1 $aBICUDO, S. D.
700 1 $aAZEVEDO, H. C.
700 1 $aSICHERLE, C. C.
700 1 $aSOUSA, D. B. de
700 1 $aRODELLO, L.
773 $tSmall Ruminant Research$gv. 85, p. 85-90, 2009.
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