Effect of Level of Feeding on Breeding Performance and Conceptus Development at 60 Days of Pregnancy in the Gilt

Dyck, G. W.; Strain, J. H.

doi:10.4141/cjas79-084

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…Low plane feeding, however, does not appear to have such negative effects. Anderson (1975), Dyck (1991) and Dyck & Strain (1979) found no effect of low plane feeding commencing fiom as early as 35 days before mating and continuing throughout early pregnancy on embryo survival. We have recently examined the effects of different planes of nutrition, both before and after mating, on embryo survival and function on day 12 (Ashworth et al 1995(Ashworth et al , 1996.…”

Section: Effects Of Nutrition On Embryo Survival and Growth (I) Spec@mentioning

confidence: 92%

Effects of Pre‐ and Post‐Mating Nutrition on Embryo Survival in Gilts

Cj¹,

Antipatis²

1999

Reprod Domestic Animals

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Section: Effects Of Nutrition On Embryo Survival and Growth (I) Spec@mentioning

confidence: 92%

Effects of Pre‐ and Post‐Mating Nutrition on Embryo Survival in Gilts

Cj¹,

Antipatis²

1999

Reprod Domestic Animals

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“…In the production of replacement gilt, increasing the energy supply of the diet would make the replacement gilts grow quickly to meet the breeding standard as soon as possible ( 17 , 18 ), but it will cause excessive obesity of the gilts, which often leads to mammary gland fat deposition and dysplasia, affecting milk production; furthermore, it has adverse effects on the lactation function in the later period ( 10 ). However, the question is how to balance the high-energy needs of gilts for rapid development and the adverse effects of excessive energy on mammary gland development.…”

Section: Introductionmentioning

confidence: 99%

Effects of Energy and Dietary Fiber on the Breast Development in Gilt

Tang

Xu³

et al. 2022

Front. Vet. Sci.

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To study the effects of energy and dietary fiber on breast development in gilts and its possible mechanisms, 32 gilts (Landrace × Yorkshire) were randomly allocated into a 2 × 2 factorial design to receive a diet with low or high energy [LE: 33.37 MJ/d digestible energy (DE); HE: 41.87 MJ/d DE] and low or high fiber (LF: 0.3 kg/d dietary fiber, HF: 0.6 kg/d dietary fiber). The weight of breast tissue was recorded. The mammary glands were collected for further analyses. The high energy intake increased the relative weight of breast tissue (p < 0.05) and the content of breast fat (p < 0.05). At the same time, the oil red staining of breast slices also showed an increase in breast fat content in high-energy treatment. High energy intake increased the DNA concentration in breast tissues (p < 0.05). In addition, high energy intake increased the concentration of triglycerides, free fatty acids, and total cholesterol in the blood of gilts (p < 0.05), and the supplementation of high fiber tended to reduce free fatty acids, total cholesterol, and estradiol (p < 0.1). Proteomic analysis suggested that there were notable differences in the cytoskeleton, intracellular non–membrane-bounded organelle, apoptosis, receptor activity, and endopeptidase inhibitor activity in molecular function between the energy and fiber effects (p < 0.05). High fiber intake also decreased the mRNA expression of 5-HT7, Bax, and caspase-3 in the breast tissue of gilts (p < 0.05), which further confirmed the importance of fiber in regulating breast development in gilt. Our results indicate that increasing gilt energy intake improved breast weight and fat deposition and increased breast cell apoptosis. Increased fiber intake reduced breast fat deposition and breast cell apoptosis at high energy intake in gilts. These results provide a potential strategy for dietary intervention against high energy intake in gilts and even in humans.

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“…Throughout vertebrates the onset of estrus indicates that the female organism has reached sufficient sexual maturity to reproduce. Studies have shown that reproductive function in pigs is sensitive to the status of energy reserves suggesting that weight loss in humans by extreme dieting methods may have potential negative effects on fertility [ 1 – 3 ]. Nutritional factors are the strongest and most obvious environmental factors affecting the timing of puberty [ 4 ], and studies have revealed that nutrient restriction in post-pubertal gilts led to cessation of estrus [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Nutritional status, especially overall energy level, is important for the onset of estrus [ 1 – 3 , 5 ]. Depressed luteinizing hormone (LH) and follicle stimulating hormone (FSH) secretion led to the inhibition of gonadal function and reproductive failure in nutrient restricted animals [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Reproductive Hormone and Transcriptomic Responses of Pituitary Tissue in Anestrus Gilts Induced by Nutrient Restriction

DingYue

Zhou

et al. 2015

PLoS ONE

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The onset of estrus is a critical sign of female sexual maturity. The pituitary plays a vital role in this process by the secretion of reproductive hormones. To investigate the effects of nutrient restriction on reproductive function and the underlying mechanisms involved, deep RNA sequencing of pituitary gland tissue was carried out to determine the differentially expressed genes (DEGs) between gilts in normal estrus, and gilts in which anestrus was induced by nutrient restriction. Gilts which had gone through two estrus cycles were fed a normal (CON, 2.86kg/d, n = 10) or nutrient restricted (NR, 1kg/d, n = 10) diet. The NR gilts experienced another three estrus cycles, but did not express estrus symptoms at the anticipated 6th and 7th cycles. Body weight gain in NR gilts was significantly decreased by nutrient restriction. Gilts were considered as anestrus when blood progesterone concentrations lower than 1.0 ng/mL from three consecutive blood samples were recorded. Circulating concentrations of progesterone (< 1.0 ng/mL vs. 2.1 ng/mL) and estradiol (208.6 ng/mL vs. 371.8 ng/mL) were significantly lower in the NR gilts than in the CON gilts. Between 5,360,000 and 5,370,000 sequence reads per sample from the CON and NR gilts’ pituitaries were obtained and mapped to the porcine genome. Analysis of read counts revealed 185 DEGs. Expression of selected genes was validated by the use of quantitative real-time RT-PCR. Bioinformatic analysis identified that the genes identified were enriched in the GO terms “neuroactive ligand-receptor interaction”, “GnRH signaling pathway” and “immune response system”. Our findings provide a new perspective for understanding the nutrient restriction-induced reproductive impairment at the pituitary transcriptional level, and how this is linked to hormone secretion. Moreover, the transcriptomic changes in anestrus gilts associated with nutrient restriction could be a resource for targeted studies of genes and pathways potentially involved in the regulation of reproductive function and animal health.

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Effect of Level of Feeding on Breeding Performance and Conceptus Development at 60 Days of Pregnancy in the Gilt

Abstract: For personal use only.

Cited by 10 publications

References 9 publications

Effects of Pre‐ and Post‐Mating Nutrition on Embryo Survival in Gilts

Effects of Pre‐ and Post‐Mating Nutrition on Embryo Survival in Gilts

Effects of Energy and Dietary Fiber on the Breast Development in Gilt

Reproductive Hormone and Transcriptomic Responses of Pituitary Tissue in Anestrus Gilts Induced by Nutrient Restriction

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