Gilt development traits associated with genetic line, diet and fertility

Knauer, Mark; Cassady, J. P.; Newcom, D. W.; See, M. T.

doi:10.1016/j.livsci.2012.05.024

Cited by 16 publications

(13 citation statements)

References 32 publications

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“…Heinonen et al (2006) reported that lame sows were less likely to become pregnant compared with the non-lame sows. The tendency of lame sows to be less reproductive was consistent with studies of Heinonen et al (2002) and Knauer et al (2012). In their studies, sows with poor locomotion showed a reduced reproductive performance in that they were unlikely to reach puberty, conceive or farrow.…”

Section: Genetic Correlations Between Conformation Traits and Reprodusupporting

confidence: 87%

Genetic association between leg conformation in young pigs and sow reproduction

Nilsson

Norberg

et al. 2015

Livestock Science

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Section: Genetic Correlations Between Conformation Traits and Reprodusupporting

confidence: 87%

Genetic association between leg conformation in young pigs and sow reproduction

Nilsson

Norberg

et al. 2015

Livestock Science

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“…Characterization of antioxidant activities and mRNA expression in kidney samples clearly indicated that this organ is not affected by parity number in contrast to the liver. The crucial role of liver in whole‐body energy metabolism and the recognized energetic deficiency status of younger reproductive gilts could likely account for these differences observed between these two organs (Schenkel et al., ; Knauer et al., ). Analyses of the oxidative status of kidney further indicated that levels of protein carbonyls is significantly increased in older multiparous sows which contrast with previous results on liver and plasma samples.…”

Section: Discussionmentioning

confidence: 99%

“…Gilts from modern genetic lines are much leaner than their counterparts of previous decades and are therefore more vulnerable to energetic and metabolic deficiencies (Cottney et al., ; Hoving et al., ; Roongsitthichai et al., ). Such problems associated with gilts are costly to producers, and there is thus an increased economic demand for gilts with greater reproductive potential, resistance and longevity (Hoge and Bates, ; Onteru et al., ; Knauer et al., ). However, while it is relatively straightforward to identify the nature of the disease or the physiological failure which leads to the removal of a gilt from the herd, identification of the underlying biological and molecular reasons for the occurrence of these events continues to be more challenging.…”

Section: Introductionmentioning

confidence: 99%

Evidence that oxidative stress is higher in replacement gilts than in multiparous sows

Roy

Lavoie

Richard

et al. 2016

Animal Physiology Nutrition

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The recent success obtained in term of increasing the litter size of sows has not correlated with a reduction of replacement rate. There is thus an increased economic demand for gilts with optimal reproductive potential and longevity. Unfortunately, replacement gilts are known to be more susceptible to diseases and less productive than multiparous sows. Interestingly, reproductive performance, resistance to diseases and longevity could all be largely affected by oxidative stress. To investigate whether oxidative stress conditions could account for the poor longevity of gilts, three distinct groups of conventional Yorkshire × Landrace sows were formed based on their similar age and parity (gilts, second parity sows as well as fourth to fifth parity sows). All animals were slaughtered during the post-ovulatory period, and blood as well as tissue samples were collected. Biomarkers of oxidative damage to proteins (carbonyls) and DNA (8-OHdG) were analysed in samples. Specific mRNA expression of major antioxidants such as glutathione peroxidases 1, 3 and 4 (GPx1, GPx3, GPx4) as well as superoxide dismutases 1 and 2 (Sod1, Sod2) were monitored in liver and kidney samples by quantitative RT-PCR. Specific enzymatic activities of both GPx and SOD were measured by spectrophotometric assays. The plasma concentration of protein carbonyls was significantly different between the three groups with the highest concentration being observed in gilts (p ≤ 0.001). The mRNA expression levels of GPx1 and GPx4 were also significantly increased in the liver of gilts when compared to multiparous sows (p ≤ 0.05). SOD2 enzymatic activity was found to be higher in the liver of gilts than multiparous sows (p ≤ 0.05). Taken together, these results indicate that replacement gilts sustain significantly higher oxidative conditions than multiparous sows. Current findings may contribute to the design of nutritional regimens that will increase the productivity of gilts by counteracting oxidative stress.

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“…Finisher diets are formulated to maximize lean tissue growth and a gestation sow diet is formulated for an animal that has completed growth and its key requirements are maintenance of appropriate body composition and amino acid requirements [112]. Diets fed to gilts during the development period should be purposed to prepare animals for maximum lifetime performance by satisfying the nutritional requirements for reproductive performance, bone development, and joint and toe health [113][114]. Previous research findings [115] have confirmed that one the most critical factors identified for sow lameness is nutrition.…”

Section: Geneticsmentioning

confidence: 99%

Lameness: a principle problem to sow longevity in breeding herds.

Supakorn¹,

Stock²,

Garay³

et al. 2018

CABI Reviews

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The objective of this article is to review causes of lameness lesions, lameness detection methods, factors affecting lameness, association between lameness and other economically important swine production traits, and treatment for lameness in swine breeding herds. Lameness in sows is an important welfare and economic challenge to pig producers. It has been reported to be the second most common reason for involuntary culling of sows which directly impacts sow longevity / sow productive lifetime. Factors affecting the prevalence and severity of gilt and sow lameness breeding herd are housing type, flooring type, toes / dewclaws management, genetic effect for feet and leg conformation, and nutrition especially mineral supplements. Sow preference and behavioral response to flooring type may be likewise be affected by lameness onset, duration, severity and location. To avoid unnecessary distress and associated financial losses, early treatment of lameness observed among the females in the gilt development unit and in the breeding herd is necessary. The key factors listed previously are the foundation to a proper prevalence strategy. However, this review shows that additional research is still needed, especially studies to accurately evaluate lameness lesions, examine nutrient requirements for optimum foot health, investigate genetic effects on feet and leg conformation, clearly define the supplemental vitamin or / and mineral levels and duration for usage. All of these factors may influence breeding herd lameness and may contribute to more consistent and comparable results from sow herd.

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Gilt development traits associated with genetic line, diet and fertility

Cited by 16 publications

References 32 publications

Genetic association between leg conformation in young pigs and sow reproduction

Genetic association between leg conformation in young pigs and sow reproduction

Evidence that oxidative stress is higher in replacement gilts than in multiparous sows

Lameness: a principle problem to sow longevity in breeding herds.

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