Genetic and phenotypic correlations between backfat thickness and weight at 28 weeks of age, and reproductive performance in primiparous Landrace sows raised under tropical conditions

Thiengpimol, Praew; Koonawootrittriron, Skorn; Suwanasopee, Thanathip

doi:10.1007/s11250-022-03047-4

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…As an ideal experimental animal model, pigs are widely used in metabolic disease studies of obesity and diabetes [ 3 , 50 ]. However, the fat content of pigs has also been studied as an important economic trait in animal husbandry [ 51 ], and its fat deposition ability will affect pig carcass quality, lean meat rate, and reproductive performance [ 52 , 53 , 54 ]. Therefore, subcutaneous fat thickness is a key indicator for assessing fat deposition in pigs and the reproductive performance of sows, and is regarded as a significant trait in pig breeding.…”

Section: Discussionmentioning

confidence: 99%

Differential Expression Analysis of tRNA-Derived Small RNAs from Subcutaneous Adipose Tissue of Obese and Lean Pigs

Gan

Wang

Yang

et al. 2022

Animals

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Epigenetic factors, including non-coding RNA regulation, play a vital role in the development of obesity and have been well researched. Transfer RNA-derived small RNA (tsRNA) is a class of non-coding RNA proven to be involved in various aspects of mammalian biology. Here we take pigs as a model for obesity research and use tsRNA-seq to investigate the difference in tsRNA expression in the subcutaneous adipose tissue of obese and lean pigs to elucidate the role of tsRNA in obesity development. A total of 482 tsRNAs were identified in pig adipose tissue, of which 123 were significantly differentially accumulated tsRNAs compared with the control group. The tRF-5c was the main type of these tsRNAs. The largest number of tsRNAs produced was the Gly-carrying tRNA, which produced 81 tsRNAs. Functional enrichment analysis revealed that differential tsRNAs indirectly participated in MAPK, AMPK, insulin resistance, the TNF signaling pathway, adipocytokine signaling pathway, and other signaling pathways by interacting with target genes. These are involved in bioenergetic metabolic regulatory processes, suggesting that tsRNAs may influence these pathways to mediate the regulation of energy metabolism in porcine adipocytes to promote lipid deposition, thus contributing to obesity. Our findings suggest a potential function of tsRNA in regulating obesity development.

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Section: Discussionmentioning

confidence: 99%

Differential Expression Analysis of tRNA-Derived Small RNAs from Subcutaneous Adipose Tissue of Obese and Lean Pigs

Gan

Wang

Yang

et al. 2022

Animals

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“…Most profoundly, the well-being of the sow is compromised, especially due to the loss of body reserves reflected in backfat thickness from high milk production (Koketsu et al 2017). The amount of energy required for reproduction is indicated by the backfat thickness (Thiengpimol et al 2022), and sows that extensively deplete these reserves show poor reproduction thereafter (Vinsky et al 2006). Continuing to nurse piglets puts pressure on the nurse sow and she may mobilize much of her body reserves, particularly in the event of insufficient lactational resources.…”

Section: Selected Impacts On Nurse Sowsmentioning

confidence: 99%

The nurse sow system ‒ A natural process of handling large litters: A review

Osotsi,

Novotni-Danko,

Balogh

2024

Czech J. Anim. Sci.

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Reproductive performance in pig production has gained genetic momentum resulting in large litters. Several strategies have been used to raise the number of piglets to address the challenge of a large litter size. This review provides a rationale for employing the nurse sow system as a biological way of handling large litters, exploring its step-by-step processes and its selected impacts. By exposing these steps, pig farmers will use the information to pinpoint their weak points in the chain and customize the procedures to meet their farm-specific goals for improved productivity. The nurse sow system helps to maximize pre-weaning survival by boosting the overall worth of low birth weight piglets. When piglets weaned per sow/year are used as a performance benchmark, nurse sows weaning double litters become economically advantageous. Extended time in lactation for nurse sows gives them an ample time for their uterus to involute before the next pregnancy. However, nurse sows lose their body reserves reflected in backfat thickness from high milk production. Prolonged confinement in lactation deteriorates the physical condition of nurse sows, resulting in leg ulcers and teat damage. Additionally, piglets are more distressed when taken away from their biological sow to a new sow.

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“…Therefore, sows may mobilize much of their bodily reserves, particularly in the event of insufficient lactational resources, leading to decreased backfat thickness in the first two weeks [ 6 ]. Backfat thickness indicates the amount of energy required for reproduction [ 7 ], and sows that extensively deplete these reserves show poor reproduction thereafter [ 8 , 9 ]. De Rensis et al [ 10 ] found that backfat loss during lactation was negatively associated with pregnancy rate ( p < 0.04) and positively associated with weaning-to-estrus interval ( p < 0.01).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Removal Reasons for Nurse Sows and the Associated Removal Due to Their Extended Lactation Length in Hyperprolific Farrow-Wean Herds

Osotsi,

Balogh,

Novotnine-Danko

2024

Animals

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This study aimed to characterize and quantify reasons for the removal of nurse sows and identify the removal associated with their extended lactation length (ELL). A total of 100,756 removed nurse sows within a period of 2016–2022 from 53 sow herds in the Midwest USA were analyzed. Reproductive failure was the most common removal reason (χ2 = 8748.421, p < 0.001) affecting P1, P2, and P3 nurse sows. Failure to conceive and absence of estrus were the main causes of reproductive failure (χ2 = 352.480, p < 0.001) affecting P1 and P2 nurse sows and P1 and P5 nurse sows, respectively. When P2 and P6 nurse sows had an ELL of 0–7 d, they faced a high chance (χ2 = 13.312, p = 0.021) of removal due to conception failure and failure to return to heat, respectively. When P2 and P5 nurse sows had an ELL of 8–14 d, they were highly vulnerable (χ2 = 59.847, p < 0.001) to removal due to failure to conceive and showing heat, respectively. Finally, when ELL was at 15–21 days, P4 and P5 nurse sows were more likely (χ2 = 41.751, p < 0.001) to be removed due to failure to express heat, whereas at the same time, P2 and P3 nurse sows experienced the same removal threat due to failing to conceive. These results could help producers manage nurse sow systems.

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Genetic and phenotypic correlations between backfat thickness and weight at 28 weeks of age, and reproductive performance in primiparous Landrace sows raised under tropical conditions

Cited by 7 publications

References 26 publications

Differential Expression Analysis of tRNA-Derived Small RNAs from Subcutaneous Adipose Tissue of Obese and Lean Pigs

Differential Expression Analysis of tRNA-Derived Small RNAs from Subcutaneous Adipose Tissue of Obese and Lean Pigs

The nurse sow system ‒ A natural process of handling large litters: A review

Characterization of Removal Reasons for Nurse Sows and the Associated Removal Due to Their Extended Lactation Length in Hyperprolific Farrow-Wean Herds

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