Reproductive performance of gilts according to growth rate and backfat thickness at mating

Animal Reproduction Science
W S Amaral FilhaF P Bortolozzo

Abstract

The study evaluated the influence of growth rate (GR) and backfat thickness (BF), at first mating of gilts, on the reproductive performance until the first farrowing and on the variation in birth weight of piglets. Gilts were categorized into three groups according to GR from birth until the first mating: GRI (600-700 g/d; n = 345), GRII (701-770 g/d; n = 710) and GRIII (771-870 g/d; n = 366). Analyses were also performed considering three groups formed according to BF (mm) at mating: BFI (10-15 mm; n = 405); BFII (16-17 mm; n = 649)and BFIII (18-23 mm; n = 367). There were no differences in farrowing rate and return to estrus rate among BF or GR groups (P > 0.05). GRII and GRIII females had larger litter size compared to GRI gilts (P < 0.05), respectively, 0.5 and 0.9 more piglets, but a greater percentage of intra-partum stillborns (P < 0.05) was observed in GRIII than in GRI and GRII females. Moreover GRIII females had more piglets (P < 0.05) weighing less than 1,200 g, litters with a greater coefficient of variation for birth weight and a greater percentage of litters with a coefficient of variation above 20% (P < 0.05) than GRI females. More total born and born alive piglets were observed in BFII compared with BFI females ...Continue Reading

References

Jul 19, 2005·Preventive Veterinary Medicine·Vladimir F BorgesIvo Wentz
Jan 25, 2006·Animal Reproduction Science·Rafael KummerFernando Pandolfo Bortolozzo
Aug 13, 2008·Reproduction in Domestic Animals = Zuchthygiene·R KummerF P Bortolozzo

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Citations

Jul 16, 2014·Tropical Animal Health and Production·Atthaporn RoongsitthichaiPadet Tummaruk
Jun 28, 2018·Animal Science Journal = Nihon Chikusan Gakkaihō·Tian LiangWen Aiyou
Jul 19, 2018·Animal : an International Journal of Animal Bioscience·A LaveryD P Berry
Jul 22, 2019·Animals : an Open Access Journal From MDPI·Jennifer Patterson, George Foxcroft
Aug 15, 2019·Animals : an Open Access Journal From MDPI·Ji-Wei LiPei-Shi Yan

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