Taxa de concepÃ§Ã£o de Ã©guas cobertas 12 ou 24 horas apÃ³s a ovulaÃ§Ã£o.
The objective of the experiment was to study the fertility of mares bred after ovulation, detected by rectal palpation every 24 (P1) or 12 hours (P2), using two stallions (G1 and G2). This study was done with 84 estrus cycles of 50 military crossbred mares, randomly assigned to four treatments: T1 (P1G1) - 17 mares and 25 estrus cycles; T2 (P2G1) - 20 mares and 33 estrus cycles; T3 (P1G2) - 12 mares and 16 estrus cycles; and T4 (P2G2) - 10 mares and 10 estrus cycles. The conception rate for first, second and third estrus cycles were 29.41% (5/17) and 50.00% (4/8) for group P1G1; 25.00% (5/20), 54.54% (6/11) and 100.00% (2/2) for group P2G1; 41.66% (5/12) and 50.00% (2/4) for group P1G2; and 60.00% (6/10) for group P2G2, respectively. The conception rate for each treatment were 36.00% (9/25), 39.40% (13/33), 43.75% (7/16) and 60.00% (6/10). The conception rate by estrus cycle did not differ (p>0.05) by Fisher Test or Chi-Square, nether between rectal palpation intervals nor stallions. The data obtained were regrouped considering only the rectal palpation frequency and it was obtained 39.02 (16/41) and 44.19% (19/43) for conception rate by estrus cycle and 55.2% (16/29) and 63.3% (19/30) for total conception rate for 24 and 12 to rectal palpation intervals, respectively.
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Advisor:Alan Maia Borges; Jose Reinaldo Mendes Ruas; Giovanni Ribeiro de Carvalho; Maristela Silveira Palhares
School:Universidade Federal de Minas Gerais
Source Type:Master's Thesis
Keywords:egua reproduã§ã£o teses ovulaã§ã£o fertilidade
Date of Publication:02/01/2007