Evaluation of a natural methionine source on broiler growth performance

Hayat, Zafar; Rehman, A.; Akram, Kashif; Farooq, Umar; Saleem, Gulbeena

doi:10.1002/jsfa.6974

Cited by 10 publications

(7 citation statements)

References 23 publications

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“…Our finding of no changes in the weight gain of broilers in the finisher period by the combined effect of L-Met and DL-Met is the similar to other researchers [33,35,36] who observed that L-Met or DL-Met did not significantly influence the weight gain of broilers in the finisher period. This was because when large quantities of methionine are added in the feed, excess methionine is converted into homocysteine and higher amounts of homocysteine in the body reduce the body weight of broilers [37]. No significant differences (p > 0.05) were observed by different type of methionine on feed intake, weight gain, and FCR of broilers in the finisher period.…”

Section: Discussionmentioning

confidence: 99%

Growth Performance of Broilers as Influenced by Different Levels and Sources of Methionine Plus Cysteine

Rehman

Arif

Husnain

et al. 2019

Animals

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Simple Summary: The current work evaluated the utilization of different sources of methionine either from DL-methionine (DL-Met) or L-methionine (L-Met) using different concentrations of dietary methionine plus cystine (Met + Cyst) in broiler chickens. Results showed that a better edible meat yield could be obtained by supplementing Met + Cyst at the rate of 80% of the digestible lysine.Abstract: The objective of this work was to evaluate the utilization of methionine from DL-methionine (DL-Met) and L-methionine (L-Met) with different levels of dietary methionine plus cystine (Met + Cyst) in broilers. The experimental diets were formulated by using three levels of Met + Cyst, i.e., 74%, 77% and 80% of digestible lysine. Met + Cyst was provided either from DL-Met or L-Met. A total of 450 day-old broilers were divided into six groups (five replicates of 15 birds each) in a 3 × 2 factorial arrangement under completely randomized design. Weight gain (WG), feed intake (FI) and feed conversion ratio (FCR) was determined. At the end of the experiment (35 days), two birds from each replicate were slaughtered to determine carcass characteristics and serum homocysteine. Results indicate that the combined effect of L-Met and DL-Met significantly affected (p < 0.05) the WG in the starter period and FI in the finisher period. Neither source nor level of methionine influenced (p > 0.05) the FI, WG and FCR of broilers during the starter, finisher or overall phase of growth. The interaction between sources and levels of methionine did not influence (p > 0.05) the feed intake, weight gain and FCR during the overall phase of growth. Source of methionine had no (p > 0.05) effect on carcass characteristics. Methionine levels had a significant effect (p < 0.05) on carcass weight, chest weight and thigh weight. The interaction between sources and levels of methionine had a significant (p < 0.05) effect on the liver weight. The sources of methionine had significant (p < 0.05) effects on the liver and heart weight, while methionine levels significantly influenced (p < 0.05) the liver and gizzard weight. Finally, it was concluded that if DL-Met and L-Met are included in feed at a standard level, they are equally effective as a source of methionine for broilers.

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Section: Discussionmentioning

confidence: 99%

Growth Performance of Broilers as Influenced by Different Levels and Sources of Methionine Plus Cysteine

Rehman

Arif

Husnain

et al. 2019

Animals

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“…Recently, some reports have emphasized that dietary Met supplementation had a positive effect on the weight gain of offspring chickens ( Hayat et al., 2015 , Wen et al., 2017b ), but excessive Met addition might have a negative effect on weight gain. Similar trends were found in breast and thigh muscle weight gains and eviscerated weight in the present study, which closely agreed with a study by Wen et al.…”

Section: Discussionmentioning

confidence: 99%

“…In the past decades, many studies have proven that the levels of dietary Met were closely related to egg production and egg quality, such as egg weight and albumen quality ( Shafer et al., 1996 , Shafer et al., 1998 ). It has also been reported that dietary Met affected the growth and development of chickens ( Wen et al., 2017a ) and could elevate their growth performance and carcass traits ( Wen et al., 2014 , Hayat et al., 2015 , Wen et al., 2017b , Zhang et al., 2017 ). However, Xue et al.…”

Section: Introductionmentioning

confidence: 99%

Maternal dietary methionine supplementation influences egg production and the growth performance and meat quality of the offspring

et al. 2020

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This study aimed to investigate the effects of maternal dietary coated methionine ( Met ) on egg production and the quality, growth performance, carcass traits, and meat quality of the offspring. In total, 288 female Ross parental chickens were randomly assigned to 3 groups with 3 replicates of 32 chickens each. From week 37 to 46, the hens of different groups were fed diets containing low (0.27% Met), adequate (0.27% Met + 0.1% coated Met) ( AM ), and high (0.27% Met + 0.2% coated Met) ( HM ) Met. There was a positive response in laying rate and albumen weight in AM and HM groups. For the offspring at market age, BW, eviscerated weight, and muscle weight were increased in the AM group ( P < 0.05), whereas excessive supplementation was proven to be negative with those traits. The meat quality (color, pH, and shear force) of breast muscle was significantly influenced by different supplementation levels. The lightness and yellowness were increased in the HM group ( P < 0.05, P < 0.01, respectively), and redness was decreased in the AM group ( P < 0.05). A lower pH value occurred in chickens of the HM group ( P < 0.05). The expressions of meat quality–related genes were altered in the supplementation groups. The pH-related genes PRDX4 and PRKAG2 were found to be significantly differentially expressed ( P < 0.05, P < 0.01, respectively) and consistent with pH changes. The meat color–related gene BCO1 was also differentially expressed ( P < 0.01) and showed a corresponding change with yellowness value. Collectively, the best production performance was in the offspring with 0.1% coated Met supplementation (AM group). Supplementation with 0.2% coated Met (HM group) seemed to be excessive, but laying rate was increased in the HM group. Both results of phenotypic measurements and gene expression demonstrated that maternal-coated Met supplementation resulted in fluctuation of some meat quality indices in the offspring, but all values were still within the range found in normal chickens.

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“…Methionine is an essential sulphur containing amino acid which is important to the health and growth of broilers either when given in natural or synthetic form (6). Poultry performance and body weight are affected by methionine supply but not by the methionine source.…”

Section: Introductionmentioning

confidence: 99%

The Role of L. Methionine, L. Carnitine, Choline and/or Silymarin in Hepatoprotection Against Paracetamol Intoxication and Oxidative Stress in Broilers

Aziz¹,

Zahra²,

Kheder³

et al. 2019

SVR

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Paracetamol (Acetaminophen) was used for long time in poultry as an antipyretic drug and as a growth stimulator. However, high doses of paracetamol cause unpleasant side effects such as hepatorenal toxicity as mirrored by depletion of glutathione reserve, increase lipid peroxidation and increase liver enzymes or even sudden death with lethal doses. Therefore, this study was designated to evaluate the ameliorative effect of L. methionine, L. carnitine, choline and/or silymarin on the hepatotoxic effect induced by high doses of paracetamol. The study was applied on 80 chicks (from 1 till 33 days old) in special cages divided into 8 groups each one contained 10 chicks. The 1 st group was used as a control, while the next 2-5 groups were supplemented with L. methionine, L. carnitine, choline and silymarin, respectively with doses as recommended by NRC, the 5 th group was supplemented with silymarin (1 g/kg diet), the 6 th group was supplemented with a mixture of the 4 supplements, the 7 th group (hepatic intoxicated group) was given paracetamol (650 mg/kg diet for 7 days), and the 8 th group was administrated paracetamol with a mixture of the 4 supplements. Serum samples were collected to determine levels of lipid profile [triglycerides (TG) and total cholesterol (TC)], liver damage enzymes [alanine transaminase (ALT), aspartate transferase (AST)], lipid peroxidation marker malondialdehyde (MDA), and activity of antioxidant enzymes [glutathione reductase (GR), superoxide dismutase (SOD)]. The obtained results revealed that there was a significant improvement in all measured serum biochemical parameters and final body weight gain in the combined group (4 supplements + paracetamol) as compared to the paracetamol group. These data conclude that supplementation of poultry diets with L. methionine, L. carnitine, choline and silymarin can improve the negative effect of paracetamol through increasing the body weight gain and antioxidant activity of glutathione and superoxide dismutase and decreasing malondialdehyde, liver enzymes, cholesterol and triglycerides.

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Evaluation of a natural methionine source on broiler growth performance

Abstract: The results of the present study show that synthetic methionine may effectively be replaced with a naturally sourced methionine without affecting the health and growth performance of broilers. However, additional research is needed to further explore other natural sources of methionine.

Cited by 10 publications

References 23 publications

Growth Performance of Broilers as Influenced by Different Levels and Sources of Methionine Plus Cysteine

Growth Performance of Broilers as Influenced by Different Levels and Sources of Methionine Plus Cysteine

Maternal dietary methionine supplementation influences egg production and the growth performance and meat quality of the offspring

The Role of L. Methionine, L. Carnitine, Choline and/or Silymarin in Hepatoprotection Against Paracetamol Intoxication and Oxidative Stress in Broilers

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