Influence of season on corpus luteum structure and function and AI outcome in the Italian Mediterranean buffalo (Bubalus bubalis)

Di Francesco, S., Neglia, G., Vecchio, D., Rossi, P., Russo, M., Zicarelli, L., D'Occhio, M. J. and Campanile, G. (2012) Influence of season on corpus luteum structure and function and AI outcome in the Italian Mediterranean buffalo (Bubalus bubalis). Theriogenology, 78 8: 1839-1845. doi:10.1016/j.theriogenology.2012.07.022


Author Di Francesco, S.
Neglia, G.
Vecchio, D.
Rossi, P.
Russo, M.
Zicarelli, L.
D'Occhio, M. J.
Campanile, G.
Title Influence of season on corpus luteum structure and function and AI outcome in the Italian Mediterranean buffalo (Bubalus bubalis)
Journal name Theriogenology   Check publisher's open access policy
ISSN 0093-691X
1879-3231
Publication date 2012-11-01
Sub-type Article (original research)
DOI 10.1016/j.theriogenology.2012.07.022
Volume 78
Issue 8
Start page 1839
End page 1845
Total pages 7
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Language eng
Formatted abstract
The aim was to ascertain whether relationships between corpus luteum (CL) vascularization, CL function, and pregnancy outcome in AI in buffaloes were consistent across the breeding season and transition period to the nonbreeding season in a Mediterranean environment. Stage of the estrous cycle in Italian Mediterranean buffaloes was synchronized using the Ovsynch with timed AI program and buffaloes were mated by AI in both the breeding season (N = 131) and transition period (N = 125). Detailed investigation of CL structure and function was undertaken in 39 buffaloes at each of the respective times using realtime B-mode/color-Doppler ultrasonography on Days 10 and 20 after AI. Progesterone (P4) concentrations were determined by RIA in all buffaloes. Pregnancy rate on Day 45 after AI was greater (P < 0.05) during the breeding season (58.0%) than the transitional period (45.6%) and this was primarily the result of a lower (P < 0.05) late embryonic mortality during the breeding season (7.3%) compared with the transition period (23%). Circulating concentrations of P4 on Days 10 and 20 after AI were greater (P < 0.01) during the breeding season (4.6 ± 0.3 and 3.4 ± 0.2, respectively) than during the transition period (1.6 ± 0.12 and 1.8 ± 0.2, respectively), and this was independent of reproductive status as there was no interaction between pregnancy and season. Corpus luteum time average medium velocity at Day 10 after AI was greater (P < 0.01) during the breeding season (19.3 ± 1.5) than in the transitional period (8.3 ± 0.7). There were positive correlations in pregnant buffaloes between CL time average medium velocity and P4 concentrations on Day 10 (r = 0.722; P < 0.01) and Day 20 (r = 0.446; P < 0.01) after AI. The findings were interpreted to indicate that relationships between CL vascularization, CL function, and pregnancy outcome in AI in buffaloes are consistent across the breeding season and transition period to the nonbreeding season. The distinction between the breeding season and the transition period is the relatively low proportion of buffaloes that have CL function and P4 concentrations required to establish a pregnancy during the transition period, which is manifested in a greater incidence of embryonic mortality.
Keyword Buffalo
Season
Corpus luteum
Pregnancy
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2013 Collection
 
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