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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 439118
Title Piglet birth weight and litter uniformity: Effects of weaning-to-pregnancy interval and body condition changes in sows of different parities and crossbred lines
Author(s) Wientjes, J.G.M.; Soede, N.M.; Knol, E.F.; Brand, H. van den; Kemp, B.
Source Journal of Animal Science 91 (2013)5. - ISSN 0021-8812 - p. 2099 - 2107.
DOI http://dx.doi.org/10.2527/jas.2012-5659
Department(s) Adaptation Physiology
WIAS
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) subsequent reproductive-performance - nutritionally induced relationships - feed-intake - estrus interval - follicle development - luteinizing-hormone - conception interval - genetic-parameters - ovulation interval - oocyte maturation
Abstract Piglet birth weight and litter uniformity were studied in sows of different parities and crossbred lines in relation to 1) the weaning-to-pregnancy interval (WPI); and 2) sow body condition changes (in BW and backfat thickness) during lactation and gestation in sows with a short WPI (= 7d). At the IPG research farm, individual piglet birth weights and sow body condition (BW and backfat thickness at farrowing and weaning) were measured of 949 TOPIGS20 and 889 TOPIGS40 sows with > 4 total born piglets, inseminated between 2003 and 2011. In all analyses, mean piglet birth weight and birth weight SD and CV were corrected for total number born. Total number born was higher in sows with a WPI of 8 to 21d (+ 1.2 piglets; n = 72) and >21d (+ 0.7 piglets; n = 182) compared with sows with a WPI = 7d (P <0.01; n = 1,584). Mean piglet birth weight was not affected by WPI. Birth weight SD (- 23 g) and CV (- 1.7%) were lower in sows with a WPI > 21d compared with sows with a WPI = 7d (P <0.01). Effects of WPI were independent of sow parity. Effects of body condition changes in sows with a WPI = 7d were studied separately in TOPIGS20 sows inseminated between 2006 and 2011 (n = 808) and in TOPIGS40 sows inseminated between 2003 and 2008 (n = 747). Sow body condition loss during lactation was not related with subsequent total number born or mean piglet birth weight. Only in TOPIGS20 sows, more BW loss during lactation was related with higher subsequent birth weight SD (ß = 0.83 g/kg, P <0.01; ß = 1.62 g/%, P <0.01), and more backfat loss during lactation was related with higher subsequent birth weight SD (ß = 5.11 g/mm, P <0.01) and CV (ß = 0.36 %/mm, P <0.01), independent of sow parity. Sow BW increase during gestation was negatively related with total number born (TOPIGS20: ß = - 0.06 and - 0.05 piglet/kg BW increase for parity 2 (P <0.01) and 3 and 4 ( P <0.01), respectively; TOPIGS40: ß = - 0.04 piglet/kg BW increase (P <0.01) independent of sow parity). Sow BW increase during gestation was positively related with birth weight SD (TOPIGS20: ß = 0.63 g/kg BW increase (P = 0.01) independent of sow parity). Sow body condition increase during gestation was not related with mean piglet birth weight. To conclude, this study shows that litter uniformity is compromised by severe sow body condition loss during lactation and improved in sows with a prolonged WPI. These effects are likely related with (insufficient) restoration of follicle development
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