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Registro Completo |
Biblioteca(s): |
Embrapa Agroenergia; Embrapa Milho e Sorgo; Embrapa Pecuária Sudeste. |
Data corrente: |
02/12/2016 |
Data da última atualização: |
02/12/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
VIGNA, B. B. Z.; SANTOS, J. C. S.; JUNGMANN, L.; VALLE, C. B. do; MOLLINARI, M.; PASTINA, M. M.; PAGLIARINI, M. S.; GARCIA, A. A. F.; SOUZA, A. P. |
Afiliação: |
Bianca B. Z. Vigna, UNICAMP; Jean C. S. Santos, UNICAMP; LETICIA JUNGMANN CANCADO, CNPAE; CACILDA BORGES DO VALLE, CNPGC; Marcelo Mollinari, ESALQ; MARIA MARTA PASTINA, CNPMS; Maria Suely Pagliarini, Universidade Estadual de Maringá; Antonio A. F. Garcia, ESALQ; Anete P. Souza, UNICAMP. |
Título: |
Evidence of Allopolyploidy in Urochloa humidicola based on cytological analysis and genetic linkage mapping. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Plos One, San Francisco, v. 11, n. 4, p. 1-23, Apr. 2016. |
DOI: |
10.1371/ journal.pone.0153764 |
Idioma: |
Inglês |
Conteúdo: |
The African species Urochloa humidicola (Rendle) Morrone & Zuloaga (syn. Brachiaria humidicola (Rendle) Schweick.) is an important perennial forage grass found throughout the tropics. This species is polyploid, ranging from tetra to nonaploid, and apomictic, which makes genetic studies challenging; therefore, the number of currently available genetic resources is limited. The genomic architecture and evolution of U. humidicola and the molecular markers linked to apomixis were investigated in a full-sib F1 population obtained by crossing the sexual accession H031 and the apomictic cultivar U. humidicola cv. BRS Tupi, both of which are hexaploid. A simple sequence repeat (SSR)-based linkage map was constructed for the species from 102 polymorphic and specific SSR markers based on simplex and double-simplex markers. The map consisted of 49 linkage groups (LGs) and had a total length of 1702.82 cM, with 89 microsatellite loci and an average map density of 10.6 cM. Eight homology groups (HGs) were formed, comprising 22 LGs, and the other LGs remained ungrouped. The locus that controls apospory (apo-locus) was mapped in LG02 and was located 19.4 cM from the locus Bh027.c.D2. In the cytological analyses of some hybrids, bi- to hexavalents at diakinesis were observed, as well as two nucleoli in some meiocytes, smaller chromosomes with preferential allocation within the first metaphase plate and asynchronous chromosome migration to the poles during anaphase. The linkage map and the meiocyte analyses confirm previous reports of hybridization and suggest an allopolyploid origin of the hexaploid U. humidicola. This is the first linkage map of an Urochloa species, and it will be useful for future quantitative trait locus (QTL) analysis after saturation of the map and for genome assembly and evolutionary studies in Urochloa spp. Moreover, the results of the apomixis mapping are consistent with previous reports and confirm the need for additional studies to search for a co-segregating marker. MenosThe African species Urochloa humidicola (Rendle) Morrone & Zuloaga (syn. Brachiaria humidicola (Rendle) Schweick.) is an important perennial forage grass found throughout the tropics. This species is polyploid, ranging from tetra to nonaploid, and apomictic, which makes genetic studies challenging; therefore, the number of currently available genetic resources is limited. The genomic architecture and evolution of U. humidicola and the molecular markers linked to apomixis were investigated in a full-sib F1 population obtained by crossing the sexual accession H031 and the apomictic cultivar U. humidicola cv. BRS Tupi, both of which are hexaploid. A simple sequence repeat (SSR)-based linkage map was constructed for the species from 102 polymorphic and specific SSR markers based on simplex and double-simplex markers. The map consisted of 49 linkage groups (LGs) and had a total length of 1702.82 cM, with 89 microsatellite loci and an average map density of 10.6 cM. Eight homology groups (HGs) were formed, comprising 22 LGs, and the other LGs remained ungrouped. The locus that controls apospory (apo-locus) was mapped in LG02 and was located 19.4 cM from the locus Bh027.c.D2. In the cytological analyses of some hybrids, bi- to hexavalents at diakinesis were observed, as well as two nucleoli in some meiocytes, smaller chromosomes with preferential allocation within the first metaphase plate and asynchronous chromosome migration to the poles during anaphase. The linkage map and the m... Mostrar Tudo |
Palavras-Chave: |
Análise citológica; Cytological analysis; Genetic linkage mapping; Grass; Ligações genéticas; Mapeamento genético. |
Thesagro: |
Gene; Genoma; Planta forrageira. |
Thesaurus Nal: |
Grasses. |
Categoria do assunto: |
-- F Plantas e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/151127/1/Evidence-allopolyploidy.PDF
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Marc: |
LEADER 03041naa a2200349 a 4500 001 2057798 005 2016-12-02 008 2016 bl uuuu u00u1 u #d 024 7 $a10.1371/ journal.pone.0153764$2DOI 100 1 $aVIGNA, B. B. Z. 245 $aEvidence of Allopolyploidy in Urochloa humidicola based on cytological analysis and genetic linkage mapping.$h[electronic resource] 260 $c2016 520 $aThe African species Urochloa humidicola (Rendle) Morrone & Zuloaga (syn. Brachiaria humidicola (Rendle) Schweick.) is an important perennial forage grass found throughout the tropics. This species is polyploid, ranging from tetra to nonaploid, and apomictic, which makes genetic studies challenging; therefore, the number of currently available genetic resources is limited. The genomic architecture and evolution of U. humidicola and the molecular markers linked to apomixis were investigated in a full-sib F1 population obtained by crossing the sexual accession H031 and the apomictic cultivar U. humidicola cv. BRS Tupi, both of which are hexaploid. A simple sequence repeat (SSR)-based linkage map was constructed for the species from 102 polymorphic and specific SSR markers based on simplex and double-simplex markers. The map consisted of 49 linkage groups (LGs) and had a total length of 1702.82 cM, with 89 microsatellite loci and an average map density of 10.6 cM. Eight homology groups (HGs) were formed, comprising 22 LGs, and the other LGs remained ungrouped. The locus that controls apospory (apo-locus) was mapped in LG02 and was located 19.4 cM from the locus Bh027.c.D2. In the cytological analyses of some hybrids, bi- to hexavalents at diakinesis were observed, as well as two nucleoli in some meiocytes, smaller chromosomes with preferential allocation within the first metaphase plate and asynchronous chromosome migration to the poles during anaphase. The linkage map and the meiocyte analyses confirm previous reports of hybridization and suggest an allopolyploid origin of the hexaploid U. humidicola. This is the first linkage map of an Urochloa species, and it will be useful for future quantitative trait locus (QTL) analysis after saturation of the map and for genome assembly and evolutionary studies in Urochloa spp. Moreover, the results of the apomixis mapping are consistent with previous reports and confirm the need for additional studies to search for a co-segregating marker. 650 $aGrasses 650 $aGene 650 $aGenoma 650 $aPlanta forrageira 653 $aAnálise citológica 653 $aCytological analysis 653 $aGenetic linkage mapping 653 $aGrass 653 $aLigações genéticas 653 $aMapeamento genético 700 1 $aSANTOS, J. C. S. 700 1 $aJUNGMANN, L. 700 1 $aVALLE, C. B. do 700 1 $aMOLLINARI, M. 700 1 $aPASTINA, M. M. 700 1 $aPAGLIARINI, M. S. 700 1 $aGARCIA, A. A. F. 700 1 $aSOUZA, A. P. 773 $tPlos One, San Francisco$gv. 11, n. 4, p. 1-23, Apr. 2016.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
22/01/2020 |
Data da última atualização: |
23/01/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
ALFRADIQUE, V. A. P.; OLIVARES, C. C. S.; SOUZA-FABJAN, J. M. G. de; FONSECA, J. F. da; BATISTA, R. I. T. P.; BALARO, M. F. A.; SARAIVA, H. F. R. de A.; CÔRTES, L. R.; BRANDÃO, F. Z. |
Afiliação: |
VIVIAN ANGÉLICO PEREIRA ALFRADIQUE, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; CAROLINA CERQUEIRA SARMENTO OLIVARES, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; JOANNA MARIA GONÇALVES DE SOUZA-FABJAN, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC; RIBRIO IVAN TAVARES PEREIRA BATISTA, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; MÁRIO FELIPE ALVAREZ BALARO, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; HELENA FABIANA REIS DE ALMEIDA SARAIVA, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; LUANA RANGEL CÔRTES, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; FELIPE ZANDONADI BRANDÃO, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil. |
Título: |
Mini-percoll technique induces Similar capacitation features in domestic ruminant frozen-thawed spermatozoa regardless of the presence of heparin. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Acta Scientiae Veterinariae, v. 47, Pub. 1707, p. 1-8, 2019. |
DOI: |
10.22456/1679-9216.98317 |
Idioma: |
Inglês |
Conteúdo: |
Background: Sperm capacitation is a process consists of a series of functional, biochemical, and biophysical modifications that render the ejaculated sperm competent for oocyte fertilization. Secreted by the female reproductive tract epithelium, heparin promotes capacitation by binding to and removing seminal plasma proteins, which are adsorbed to the sperm PM and would inhibit capacitation. There is substantial evidence that cryopreservation promotes capacitation-like changes in bull, ram and buck sperm. Our general hypotheses were: (a) cryopreserved ram sperm suffer capacitation more quickly than buck and bull sperm under the same conditions; (b) the capacitation status of ruminant cryopreserved sperm is similar whether or not heparin is present after the mini-Percoll technique; and (c) ruminant frozen-thawed sperm selected by mini-Percoll and incubated within media without heparin supplementation is not impaired in terms of capacitation status and sperm agglutination. This study aimed to compare sperm parameters of ovine, caprine, and bovine frozen-thawed sperm after mini-Percoll processing followed by incubation with or without heparin supplementation. Materials, Methods & Results: Commercial semen of all species were used. Sperm samples were selected by mini-Percoll and supplemented (or not) with heparin within an incubation medium for 18 h. Sperm kinematics (CASA system analyzes), capacitation status (CTC staining) and sperm agglutination were evaluated after thawing, mini-Percoll, 1.5 h, 3 h, 6 h and 18 h. In comparison with post-thawing analysis, ovine species demonstrated a reduction (P < 0.05) in most of the sperm motility parameters after mini-Percoll. Conversely, ovine samples presented the highest (P < 0.05) rate of acrosome-reacted cells after mini-Percoll. Heparin supplementation did not affect most of the parameters evaluated (P > 0.05). In caprine and bovine species, a lower (P < 0.05) rate of sperm agglutination was observed in the presence of heparin at 18 h of incubation. In the absence of heparin, ovine samples showed a higher (P < 0.05) agglutination rate compared to the bovine species after long incubation period. Discussion: The present study compared sperm parameters (sperm kinematics, agglutination rate and capacitation status) of ruminant frozen-thawed sperm after mini-Percoll selection followed by in vitro incubation with or without heparin supplementation. In this study, it was observed the same rate of capacitated cells after the sperm selection (min-Percoll) between ruminant species. This indicate that the capacitation process occurs similarly between ruminant species, refuting the first hypothesis of this study. The presence of heparin did not influence the capacitation status of ruminant frozen-thawed sperm after mini-Percoll selection, it demonstrates that the second hypothesis was supported by this study making more economic and practical the use of ruminant frozen-thawed semen. The absence of heparin in the incubation medium did not harmed the capacitation status and sperm agglutination of ruminant frozen-thawed sperm. This supported the third hypothesis of the current study and indicate that the use of mini-Percoll technique regardless the presence of heparin could be a useful alternative for the preparation of ruminant frozen-thawed sperm. In conclusion, the capacitation status of ruminant frozen-thawed sperm is similar whether or not heparin is present after the mini-Percoll technique. MenosBackground: Sperm capacitation is a process consists of a series of functional, biochemical, and biophysical modifications that render the ejaculated sperm competent for oocyte fertilization. Secreted by the female reproductive tract epithelium, heparin promotes capacitation by binding to and removing seminal plasma proteins, which are adsorbed to the sperm PM and would inhibit capacitation. There is substantial evidence that cryopreservation promotes capacitation-like changes in bull, ram and buck sperm. Our general hypotheses were: (a) cryopreserved ram sperm suffer capacitation more quickly than buck and bull sperm under the same conditions; (b) the capacitation status of ruminant cryopreserved sperm is similar whether or not heparin is present after the mini-Percoll technique; and (c) ruminant frozen-thawed sperm selected by mini-Percoll and incubated within media without heparin supplementation is not impaired in terms of capacitation status and sperm agglutination. This study aimed to compare sperm parameters of ovine, caprine, and bovine frozen-thawed sperm after mini-Percoll processing followed by incubation with or without heparin supplementation. Materials, Methods & Results: Commercial semen of all species were used. Sperm samples were selected by mini-Percoll and supplemented (or not) with heparin within an incubation medium for 18 h. Sperm kinematics (CASA system analyzes), capacitation status (CTC staining) and sperm agglutination were evaluated after thawing, ... Mostrar Tudo |
Palavras-Chave: |
Billygoats; CTC. |
Thesagro: |
Bode; Bovino; Caprino; Carneiro; Espermatozóide; Heparina; Ovino; Reprodução Animal; Sêmen. |
Thesaurus NAL: |
Animal reproduction; Assisted reproductive technologies; Bulls; Cattle; Goats; Heparin; Rams; Sheep; Sperm capacitation. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/209450/1/cnpc-2019-Mini-Percoll.pdf
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Marc: |
LEADER 04821naa a2200469 a 4500 001 2119218 005 2020-01-23 008 2019 bl uuuu u00u1 u #d 024 7 $a10.22456/1679-9216.98317$2DOI 100 1 $aALFRADIQUE, V. A. P. 245 $aMini-percoll technique induces Similar capacitation features in domestic ruminant frozen-thawed spermatozoa regardless of the presence of heparin.$h[electronic resource] 260 $c2019 520 $aBackground: Sperm capacitation is a process consists of a series of functional, biochemical, and biophysical modifications that render the ejaculated sperm competent for oocyte fertilization. Secreted by the female reproductive tract epithelium, heparin promotes capacitation by binding to and removing seminal plasma proteins, which are adsorbed to the sperm PM and would inhibit capacitation. There is substantial evidence that cryopreservation promotes capacitation-like changes in bull, ram and buck sperm. Our general hypotheses were: (a) cryopreserved ram sperm suffer capacitation more quickly than buck and bull sperm under the same conditions; (b) the capacitation status of ruminant cryopreserved sperm is similar whether or not heparin is present after the mini-Percoll technique; and (c) ruminant frozen-thawed sperm selected by mini-Percoll and incubated within media without heparin supplementation is not impaired in terms of capacitation status and sperm agglutination. This study aimed to compare sperm parameters of ovine, caprine, and bovine frozen-thawed sperm after mini-Percoll processing followed by incubation with or without heparin supplementation. Materials, Methods & Results: Commercial semen of all species were used. Sperm samples were selected by mini-Percoll and supplemented (or not) with heparin within an incubation medium for 18 h. Sperm kinematics (CASA system analyzes), capacitation status (CTC staining) and sperm agglutination were evaluated after thawing, mini-Percoll, 1.5 h, 3 h, 6 h and 18 h. In comparison with post-thawing analysis, ovine species demonstrated a reduction (P < 0.05) in most of the sperm motility parameters after mini-Percoll. Conversely, ovine samples presented the highest (P < 0.05) rate of acrosome-reacted cells after mini-Percoll. Heparin supplementation did not affect most of the parameters evaluated (P > 0.05). In caprine and bovine species, a lower (P < 0.05) rate of sperm agglutination was observed in the presence of heparin at 18 h of incubation. In the absence of heparin, ovine samples showed a higher (P < 0.05) agglutination rate compared to the bovine species after long incubation period. Discussion: The present study compared sperm parameters (sperm kinematics, agglutination rate and capacitation status) of ruminant frozen-thawed sperm after mini-Percoll selection followed by in vitro incubation with or without heparin supplementation. In this study, it was observed the same rate of capacitated cells after the sperm selection (min-Percoll) between ruminant species. This indicate that the capacitation process occurs similarly between ruminant species, refuting the first hypothesis of this study. The presence of heparin did not influence the capacitation status of ruminant frozen-thawed sperm after mini-Percoll selection, it demonstrates that the second hypothesis was supported by this study making more economic and practical the use of ruminant frozen-thawed semen. The absence of heparin in the incubation medium did not harmed the capacitation status and sperm agglutination of ruminant frozen-thawed sperm. This supported the third hypothesis of the current study and indicate that the use of mini-Percoll technique regardless the presence of heparin could be a useful alternative for the preparation of ruminant frozen-thawed sperm. In conclusion, the capacitation status of ruminant frozen-thawed sperm is similar whether or not heparin is present after the mini-Percoll technique. 650 $aAnimal reproduction 650 $aAssisted reproductive technologies 650 $aBulls 650 $aCattle 650 $aGoats 650 $aHeparin 650 $aRams 650 $aSheep 650 $aSperm capacitation 650 $aBode 650 $aBovino 650 $aCaprino 650 $aCarneiro 650 $aEspermatozóide 650 $aHeparina 650 $aOvino 650 $aReprodução Animal 650 $aSêmen 653 $aBillygoats 653 $aCTC 700 1 $aOLIVARES, C. C. S. 700 1 $aSOUZA-FABJAN, J. M. G. de 700 1 $aFONSECA, J. F. da 700 1 $aBATISTA, R. I. T. P. 700 1 $aBALARO, M. F. A. 700 1 $aSARAIVA, H. F. R. de A. 700 1 $aCÔRTES, L. R. 700 1 $aBRANDÃO, F. Z. 773 $tActa Scientiae Veterinariae$gv. 47, Pub. 1707, p. 1-8, 2019.
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