Desenvolvimento folicular e desempenho produtivo no início do ciclo de postura em duas raças de poedeiras

Ferreira, Priscila Becker; Favero, A.; Rosa, Alexandre Pires; Macedo, André; Taschetto, Diogo; Barbosa, José Guilherme Morschel Departamento de Zootecnia

doi:10.1590/s0103-84782014000300026

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…The deposition of adipose tissue is characterized by excess lipids in the body as a result of the formation of adipocytes and cellular accumulation of triacylglycerol inside lipid droplets (Wang et al, 2017). In birds, the accumulation of fat, mainly in the abdominal cavity, affects the production of eggs negatively, with consequent economic losses (Ferreira et al, 2014). Conversely, prior to the laying phase, deposition of some fat can compensate for the greater energy requirements that occur during the production period (Neme et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Digestible lysine effects on gene expression by Japanese quails in the pre-laying phase

Santana¹,

Gasparino²,

Bastos³

et al. 2020

SA J. An. Sci.

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This study aimed to determine the effects of digestible lysine levels in the diets of Japanese quail (Coturnix coturnix japonica) on performance, blood parameters and the expression of insulin-like growth factor I, and growth hormone receptor (GHR), apolipoprotein A-I (APOA-I), acetyl-CoA-carboxylase (ACC), and fatty acid synthase (FAS) genes. A total of 288 seven-day-old female Japanese quails were randomly assigned to one of three diets that contained 0.8%, 1.10%, or 1.40% digestible lysine. The birds were slaughtered at 42 days old, and relative gene expression was evaluated in the liver by qRT-PCR using the 2-ΔCT method. Lysine supplementation had no effect on weight gain and feed conversion. Abdominal fat was lower in birds supplemented with 0.8% digestible lysine than those supplemented with 1.10% and 1.40%. Increased total cholesterol and triglycerides were elevated in quails that received supplementation of 1.10% digestible lysine compared with the other diets. High density lipoproteins were decreased in birds that received 0.8% digestible lysine. Quails fed with 1.40% digestible lysine had greater expression of GHR and APOA-I than quails fed diets with 0.8 and 1.10% (P <0.05). The greatest expressions of ACC and FAS were observed in the liver of quails fed with 0.8% digestible lysine. The current results suggest that lysine supplementation in the pre-laying phase allows birds to deposit muscle mass to reach the optimal conformation and body fatness that provides an energetic reserve for the productive phase by modulating the expression of genes related to growth and lipid metabolism. Keywords: Coturnix coturnix japonica, growth, growth hormone, lipid synthesis, lipid metabolism

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Section: Introductionmentioning

confidence: 99%

Digestible lysine effects on gene expression by Japanese quails in the pre-laying phase

Santana¹,

Gasparino²,

Bastos³

et al. 2020

SA J. An. Sci.

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Histological characteristics of follicles and reproductive hormone secretion during ovarian follicle development in laying geese

et al. 2019

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Desenvolvimento folicular e desempenho produtivo no início do ciclo de postura em duas raças de poedeiras

Abstract: RESUMO Avaliaram-se as características reprodutivas de duas raças puras de poedeiras semipesadas. Foram utilizadas 800 fêmeas, 400 da raça Plymouth Rock White (PRW) e 400 da raça Plymouth Rock Barred (PRB)

Cited by 2 publications

References 8 publications

Digestible lysine effects on gene expression by Japanese quails in the pre-laying phase

Digestible lysine effects on gene expression by Japanese quails in the pre-laying phase

Histological characteristics of follicles and reproductive hormone secretion during ovarian follicle development in laying geese

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