X
XLinkedinWhatsAppTelegramTelegram
0
Read this article in:

Diet deprivation and over-allowance during prepuberty on mammary gland development and lactation performance of sows

Diet deprivation and subsequent over-allowance does not improve mammary gland development or milk yield.

13 November 2012
X
XLinkedinWhatsAppTelegramTelegram
0

The impact of diet deprivation and subsequent over-allowance in prepubertal gilts on their mammary development and mammary gene expression at the end of gestation and their lactation performance over 2 parities was determined. Seventy-seven gilts were reared under a conventional (control, CTL; n = 41) or an experimental (treatment, TRT; n = 36) dietary regimen. The experimental regimen provided 70 (restriction diet, RES) and 115% (over-allowance diet, OVER) of the protein and DE contents provided by the CTL diet. Experimental diets were fed ad libitum starting at 27.7 ± 3.4 kg of BW as follows: 3 wk RES, 3 wk OVER, 4 wk RES, and 4 wk OVER. All gilts were bred, and 34 were slaughtered on d 110 of gestation (18 CTL and 16 TRT) to collect mammary tissue for compositional analyses and gene expression measurements. Remaining gilts (23 CTL and 20 TRT) were maintained for 2 parities, and litter performance data were obtained. Blood samples for hormonal and metabolite assays were obtained on d 110 of gestation from all sows slaughtered at that time and from 14 sows per treatment on d 2 and 17 of lactation in the first parity. Milk samples were obtained from these same sows on d 17 of lactation in both parities. There was a tendency for mammary parenchymal tissue to contain less protein in TRT than CTL sows (38.55 vs. 35.09 ±1.42 %; P < 0.10), and relative mRNA abundance of the signal transducer and activator of transduction 5B gene was increased in parenchyma from TRT than CTL sows (1.39 vs. 1.19 ± 0.06; P < 0.05). Circulating prolactin (14.36 vs. 10.94 ± 0.98 ng/ml; P < 0.05) and milk lactose concentrations (5.09 vs. 4.82 ± 0.07 %; P < 0.01) were less in TRT group, whereas milk protein content was greater (4.81 vs. 5.12 ± 0.10 %; P < 0.05) in TRT sows than CTL sows on d 17 of lactation. Nevertheless, growth rate of suckling piglets over the first 2 parities was unaffected by treatment.

In conclusion, the use of a diet deprivation and over-allowance regimen in the growing-finishing period did not have beneficial effects on mammary gene expression or on sow and piglet performance.

C Farmer, MF Palin, Y Martel-Kennes. 2011. Impact of diet deprivation and subsequent over-allowance during prepuberty. Part 2. Effects on mammary gland development and lactation performance of sows. Journal of Animal Science, 90:872-880. doi: 10.2527/jas.2011-4480.

Article Comments

This area is not intended to be a place to consult authors about their articles, but rather a place for open discussion among pig333.com users.
Leave a new Comment

Access restricted to 333 users. In order to post a comment you must be logged in.

You are not subscribed to this list pig333.com in 3 minutes

Weekly newsletter with all the pig333.com updates

Log in and sign up on the list

Related articles

You are not subscribed to this list Swine News

Swine industry news in your email

Log in and sign up on the list