נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Protein sources affect follicular dynamics in ewes near the onset of the breeding season
Year:
1996
Authors :
לנדאו, יאן
;
.
Volume :
8
Co-Authors:
Landau, S., Sheep and Coats Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Hakirya, Tel Aviv, Israel
Houghton, J.A.S., Department of Animal and Veterinary Science, West Virginia University, P.O. Box 6108, Morgantown, WV, United States
Mawhinney, J.R., Department of Animal and Veterinary Science, West Virginia University, P.O. Box 6108, Morgantown, WV, United States
Inskeep, E.K., Sheep and Coats Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Hakirya, Tel Aviv, Israel
Facilitators :
From page:
1021
To page:
1028
(
Total pages:
8
)
Abstract:
The influence of source of protein during the luteal phase before a synchronized oestrus on the dynamics of follicular development, observed daily by ultrasonography, was assessed in ewes that were beginning the sexual season. Iso-nitrogenous amounts of soybean meal (SBM) or of a corn-gluten meal-ground-corn grain mixture (CGM-GC), or an iso-energetic amount of ground-corn grain (GC), were fed from four days before to four days after treatment with prostaglandin F(2α) (PGF(2α). Feeding with SBM was associated with a higher frequency of short luteal phases (P < 0.02). Dynamics of follicular population were studied in ewes that ovulated after normal cycles. More follicles ≤ 2 mm in diameter were observed on the ovaries of ewes fed SBM four days before PGF(2α), treatment (P < 0.02), but the highest number was seen in ewes fed CGM-GC at the time of injection of PGF(2α), (P < 0.08). Ewes fed SBM had larger follicles at last detection and ovulated earlier after PGF(2α), treatment than their counterparts fed other diets (P < 0.001). Ovulatory follicles developed over a greater range of days in ewes with twin ovulations compared with ewes with single ovulations (P < 0.08). Serum concentrations of insulin were increased after four days of feeding with CGM-GC (P < 0.01), but not with SBM or GC, and reached a peak at the time of oestrus. In summary: (1) the source of dietary protein during the late-luteal phase affected follicular maturation after PGF(2α), treatment; (2) insulin and glucose may be involved in this response and may play a role in ovarian follicular activity; and (3) twin ovulations appeared to result from both reduced atresia and increased recruitment of follicles.
Note:
Related Files :
animal experiment
Animals
breeding
Female
Follicular development
gluten
Glycine max
nutrition
sheep
Zea mays
עוד תגיות
תוכן קשור
More details
DOI :
10.1071/RD9961021
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23582
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:00
Scientific Publication
Protein sources affect follicular dynamics in ewes near the onset of the breeding season
8
Landau, S., Sheep and Coats Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Hakirya, Tel Aviv, Israel
Houghton, J.A.S., Department of Animal and Veterinary Science, West Virginia University, P.O. Box 6108, Morgantown, WV, United States
Mawhinney, J.R., Department of Animal and Veterinary Science, West Virginia University, P.O. Box 6108, Morgantown, WV, United States
Inskeep, E.K., Sheep and Coats Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Hakirya, Tel Aviv, Israel
Protein sources affect follicular dynamics in ewes near the onset of the breeding season
The influence of source of protein during the luteal phase before a synchronized oestrus on the dynamics of follicular development, observed daily by ultrasonography, was assessed in ewes that were beginning the sexual season. Iso-nitrogenous amounts of soybean meal (SBM) or of a corn-gluten meal-ground-corn grain mixture (CGM-GC), or an iso-energetic amount of ground-corn grain (GC), were fed from four days before to four days after treatment with prostaglandin F(2α) (PGF(2α). Feeding with SBM was associated with a higher frequency of short luteal phases (P < 0.02). Dynamics of follicular population were studied in ewes that ovulated after normal cycles. More follicles ≤ 2 mm in diameter were observed on the ovaries of ewes fed SBM four days before PGF(2α), treatment (P < 0.02), but the highest number was seen in ewes fed CGM-GC at the time of injection of PGF(2α), (P < 0.08). Ewes fed SBM had larger follicles at last detection and ovulated earlier after PGF(2α), treatment than their counterparts fed other diets (P < 0.001). Ovulatory follicles developed over a greater range of days in ewes with twin ovulations compared with ewes with single ovulations (P < 0.08). Serum concentrations of insulin were increased after four days of feeding with CGM-GC (P < 0.01), but not with SBM or GC, and reached a peak at the time of oestrus. In summary: (1) the source of dietary protein during the late-luteal phase affected follicular maturation after PGF(2α), treatment; (2) insulin and glucose may be involved in this response and may play a role in ovarian follicular activity; and (3) twin ovulations appeared to result from both reduced atresia and increased recruitment of follicles.
Scientific Publication
You may also be interested in