EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The effects of recombinant porcine somatotropin on reproductive function in gilts treated during the finishing phase


Journal of Animal Science 69(11): 4294-4298
The effects of recombinant porcine somatotropin on reproductive function in gilts treated during the finishing phase
The objective of this study was to determine the effects of recombinant porcine somatotropin (rpST) treatment during the finishing phase on subsequent reproductive function in crossbred gilts. Forty gilts weighing 50 kg and housed in a swine finishing facility were randomly assigned to control or rpST treatment. Four control and four rpST-treated gilts were allotted per pen. Twenty rpST-treated gilts received 6 mg of rpST.gilt-1.d-1 in 1 ml of buffered carrier and 20 control gilts received 1 ml of buffered carrier-gilt-1.d-1. Injections were administered daily at 1400 in the extensor muscle of the neck. All gilts received an 18% CP diet containing 1.2% lysine. Treatment was terminated when the average weight in each pen reached 110 kg. Gilts treated with rpST gained more weight (P < .05) than control gilts (59.8 +/- 1.0 vs 53.5 +/- 1.0 kg). Age at puberty was not different (rpST, 182.2 +/- 3.3; control 181.4 +/- 3.1 d). Prior treatment with rpST did not significantly affect length of estrus (rpST, 1.9 +/- .1; control, 1.8 +/- .1 d) or estrous cycle length (rpST, 20.6 +/-.4; control, 20.4 +/-.4 d). Ovulation rates at second estrus were similar for rpST gilts (15.1 +/- .5) and control gilts (14.4 +/- .5). More embryos (P = .10) were recovered on d 9 to 12 of gestation from rpST-treated gilts than from control gilts (13.1 +/- .9 vs 10.7 +/-.9). In conclusion, treatment of commercial crossbred gilts with rpST from 50 to 110 kg had no adverse effect on age at puberty, length of estrus, estrous cycle length, ovulation rate, or number of embryos recovered.


Accession: 002249427

PMID: 1752805



Related references

Effect of porcine somatotropin and dietary phosphorus on growth of bone mechanical properties of gilts during the finishing phase and a post finishing phase. Journal of Animal Science 70(SUPPL 1): 230, 1992

Studies on administration of recombinant porcine somatotropin (rPST): II. The effect of recombinant porcine somatotropin on growth performance and backfat thickness of finishing pigs. Korean Journal of Animal Sciences 35(4): 299-305, 1993

Influence of daily injections of recombinant porcine somatotropin pst on puberty and reproductive performance in gilts. Journal of Dairy Science 72(SUPPL 1): 330, 1989

Recombinant porcine somatotropin effects on sexual development and metabolic status of gilts. Canadian Journal of Animal Science 74(2): 265-271, 1994

Fatty acid profiles, lipogenesis, and lipolysis in lipid depots in finishing pigs treated with recombinant porcine somatotropin. Journal of Animal Science 71(8): 2066-2072, 1993

Recombinant porcine somatotropin effects on placental characteristics in gilts with reduced uterine capacity. Journal of Dairy Science 81(SUPPL 1): 242, 1998

Effect of porcine somatotrophin and dietary phosphorus on bone mechanical properties and mineralization of gilts during the finishing phase and a post finishing phase. Journal of Animal Science 70(SUPPL 1): 67, 1992

Effects of recombinant porcine somatotropin administration on growth performance and pork quality in finishing pigs. Korean Journal of Animal Science 39(5): 501-506, 1997

Effects of recombinant porcine somatotropin administration of growth performance and pork quality in finishing pigs. Korean Journal of Animal Science 39(5): 501-506, Sept, 1997

Effects of recombinant porcine somatotropin (rpST) on joint cartilage and axial bones in growing and finishing pigs. Canadian Journal of Animal Science 74(2): 257-263, 1994