Season influence on the seminal plasma proteins in tabapua breed (Bos taurus indicus)
The objective of the present study was to evaluate the season influence on the seminal plasma proteins in Tabapua breed bulls raised on field. The study was conducted from June to August (winter) 2006 and from December to February (summer) 2007 in a farm in the country of Presidente Prudente, SP, Br...
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Published in: | Archivos de zootecnia Vol. 60; no. 229; pp. 301 - 304 |
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Main Authors: | , , , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Universidad de Córdoba: Servicio de Publicaciones
2011
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Subjects: | |
Online Access: | Get full text |
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Summary: | The objective of the present study was to evaluate the season influence on the seminal plasma proteins in Tabapua breed bulls raised on field. The study was conducted from June to August (winter) 2006 and from December to February (summer) 2007 in a farm in the country of Presidente Prudente, SP, Brazil. Eleven bulls were submitted to six semen collects throught eletroejaculation in each season at 14 days intervals. Samples of semen were centrifuged at 1500 g/15 min and conditioned in criotubes and stored at -20ºC until further processing. The Proteins were extracted (Laemilli, 1970) and quantified (Bradford, 1976) and the electrophoresis was performed; the gels were fixed, and stained in the same solution with 2% of Coomassie Blue R250. In five bulls, the absence high molecular weight (HMW 55 KDa, 66 KDa and 80 KDa) proteins was verified in the summer and other one which is supposed to be of low fertility (LF 44 KDa), verified in two bulls in winter. Seven bulls showed presence of HMW (55KDa) in the winter. In three bulls HMW (55 KDa) and in one animal HMW (66 KDa and 80 KDa) proteins were present with a satisfactory semen condition. Eight bulls showed presence of HMW proteins (125 KDa) in winter and summer. In conclusion, the winter period presented an improvement in the qualitative aspects of the semen. A seasonal effect between the presence of the specific proteins and the increase of the semen quality was observed.
O objetivo do estudo foi de avaliar a influência das estações do ano sobre as proteínas do plasma seminal na raça Tabapuã criados extensi-vamente. O estudo foi realizado de junho a agosto (inverno) e de 2006 e de dezembro a fevereiro (verão) de 2007 em uma fazenda pertencente ao município de Presidente Prudente-SP, Brasil. Onze touros foram submetidos a seis coletas de sêmen por eletroejaculação em cada estação com intervalos de 14 dias. Amostras do sêmen foram centrifugadas a 1500 g/15 min e acondicionadas em criotubos, estocadas a -20ºC até o processa-mento. As proteínas foram extraídas (Laemilli, 1970) e quantificadas (Bradford, 1976) e as eletroforeses realizadas; e os géis fixados e corados na mesma solução com 2% de Coomassie Blue R250. Em cinco touros a ausência de proteínas de alto peso molecular (APM 55 KDa, 66 KDa e 80 KDa) foi verificada no verão; e uma que se supõe ser de baixa fertilidade (BF 44 KDa) presente em dois touros no inverno. Sete touros mostraram presença de proteínas de APM (55 KDa) no inverno. Em três touros a proteína APM (55 KDa) e em um animal as proteínas APM (66 KDa e 80 KDa) estiveram presentes com uma condição satisfa-tória de sêmen. Oito touros mostraram presença de proteínas APM (125 KDa) no inverno e verão. Conclui-se que o inverno apresentou melhoria nos aspectos qualitativos do sêmen. Houve efeito sazonal entre a presença de proteínas específicas e a melhoria da qualidade do sêmen. |
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ISSN: | 0004-0592 |