Dietary manipulation of Bos indicus x heifers during gestation affects the reproductive development of their heifer calves

Sullivan, T. M., Micke, G. C., Greer, R. M., Irving-Rodgers, H. F., Rodgers, R. J. and Perry, V. E. A. (2009) Dietary manipulation of Bos indicus x heifers during gestation affects the reproductive development of their heifer calves. Reproduction, Fertility and Development, 21 6: 773-784. doi:10.1071/RD09004


Author Sullivan, T. M.
Micke, G. C.
Greer, R. M.
Irving-Rodgers, H. F.
Rodgers, R. J.
Perry, V. E. A.
Title Dietary manipulation of Bos indicus x heifers during gestation affects the reproductive development of their heifer calves
Journal name Reproduction, Fertility and Development   Check publisher's open access policy
ISSN 1031-3613
1448-5990
Publication date 2009-01-01
Year available 2009
Sub-type Article (original research)
DOI 10.1071/RD09004
Open Access Status
Volume 21
Issue 6
Start page 773
End page 784
Total pages 12
Place of publication Australia
Publisher CSIRO
Language eng
Abstract The effect of nutrition during the first and second trimesters of pregnancy in composite beef heifers on reproductive parameters of their female calves was determined in the present study. At artificial insemination, heifers were assigned to one of four treatment groups (i.e. HH, HL, LowH and LL) depending on the level of crude protein intake (H = high; L = low) for first and second trimesters of pregnancy. Gonadotrophin concentrations and ovarian parameters were measured in their female calves at 5 and 23 months of age. Crude protein intake was positively associated with dam plasma urea (P < 0.001). The density of healthy follicles in heifers at the time of death was negatively correlated with dam plasma urea at Day 179 (P = 0.009). Heifers from LowH dams had a smaller-sized prepubertal largest ovarian follicle (P = 0.03) and lower densities of primordial and primary follicles (P = 0.02) and healthy antral follicles (P = 0.009) when they were killed. There was a positive correlation between plasma FSH concentrations at 5 and 23 months of age (P = 0.02), as well as between the sizes of the largest ovarian follicles at 6 and 23 months of age (P = 0.01). In conclusion, the reproductive development of heifers may be affected by prenatal nutrition during early and mid-gestation.
Formatted abstract
The effect of nutrition during the first and second trimesters of pregnancy in composite beef heifers on reproductive parameters of their female calves was determined in the present study. At artificial insemination, heifers were assigned to one of four treatment groups (i.e. HH, HL, LowH and LL) depending on the level of crude protein intake (H ≤ high; L ≤ low) for first and second trimesters of pregnancy. Gonadotrophin concentrations and ovarian parameters were measured in their female calves at 5 and 23 months of age. Crude protein intake was positively associated with dam plasma urea (P 0.001). The density of healthy follicles in heifers at the time of death was negatively correlated with dam plasma urea at Day 179 (P ≤ 0.009). Heifers from LowH dams had a smaller-sized prepubertal largest ovarian follicle (P ≤ 0.03) and lower densities of primordial and primary follicles (P ≤ 0.02) and healthy antral follicles (P ≤ 0.009) when they were killed. There was a positive correlation between plasma FSH concentrations at 5 and 23 months of age (P ≤ 0.02), as well as between the sizes of the largest ovarian follicles at 6 and 23 months of age (P ≤ 0.01). In conclusion, the reproductive development of heifers may be affected by prenatal nutrition during early and mid-gestation. © 2009 CSIRO.
Keyword Gonadotrophins
Follicle-stimulating-hormone
Ovary
Prenatal nutrition
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Scopus title: Dietary manipulation of Bos indicus heifers during gestation affects the reproductive development of their heifer calves; Manuscript received 5 January 2009, accepted 13 April 2009

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Veterinary Science Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 27 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 27 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 03 Sep 2009, 17:52:25 EST by Mr Andrew Martlew on behalf of School of Veterinary Science