Lysine: Amino acid requirements of broiler breeders

Fisher, C.

doi:10.1093/ps/77.1.124

Cited by 45 publications

(24 citation statements)

References 20 publications

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“…Based on the values of methionine content of whole egg (3.646 mg/g egg) (Lunven et al 1973) and the efficiency of dietary methionine for egg production (55.2%) (Nonis & Gous 2006), the methionine requirement for producing eggs is up to 661 mg/100 g egg, so the egg mass has critical effect on the methionine requirement of broiler breeders. The methionine required for maintenance was also estimated as suggested by Nonis and Gous (2006) and Fisher (1998) to be 115.6 mg/hen/day. In the present study, the egg mass ranged from 27-30 g/hen/day, so the total methionine requirement of broiler breeders was estimated to be 291.1-313.9 mg/hen/day, which was just slightly higher than the amount supplied by the basal diet (262.5-273 mg/hen/day).…”

Section: Discussionmentioning

confidence: 99%

Dietary methionine source and level affect hepatic sulfur amino acid metabolism of broiler breeder hens

Jian-mei

Ding

Wang

et al. 2017

Animal Science Journal

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A study was carried out to investigate the effects of dietary methionine source and level on plasma free amino acids patterns and the expression of genes involved in hepatic methionine metabolism in broiler breeders. A total of 2184 broiler breeders were assigned to 13 dietary treatments, with eight replicates per treatment. The 13 treatments included one control group and 12 additional treatments employing two sources and six levels (0.05, 0.10, 0.15, 0.20, 0.25 and 1.00%). Higher plasma methionine concentration was measured for DL‐methionine (DLM) treated hens. Plasma alanine concentration was linearly increased as DLM or 2‐hydroxy‐4‐(methylthio) butanoic acid (HMTBA) supplementation level increased. There was a linear increase in concentrations of tyrosine, valine, glycine and serine as dietary DLM supplementation level increased. Hens treated with DLM had higher relative expression of ADA than those fed HMTBA. The expression of MS,ADA,SAHH and MAT2A changed quadratically as HMTBA supplementation level increased, while the expression of GNMT and SAHH changed quadratically as DLM supplementation level increased. In conclusion, the effects of HMTBA on plasma free amino acid patterns and the expression of hepatic genes involved with methionine are different from DLM.

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Section: Discussionmentioning

confidence: 99%

Dietary methionine source and level affect hepatic sulfur amino acid metabolism of broiler breeder hens

Jian-mei

Ding

Wang

et al. 2017

Animal Science Journal

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“…Initially this was on economic grounds but their use is now being encouraged by concerns over N-pollution (Fisher, 2000). When modelling the amino acid requirements of broiler breeder hens, a question that requires closer scrutiny is the efficiency with which synthetic amino acids are used for egg production.…”

Section: Introductionmentioning

confidence: 99%

Utilisation of synthetic amino acids by broiler breeder hens

Nonis¹,

Gous²

2006

SA J. An. Sci.

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This study was conducted to examine the response of broiler breeder hens to feeds supplemented with synthetic lysine and methionine when fed once or twice daily during peak production. Replacing intact protein with increasing amounts of free lysine and methionine, up to 2.3 g/kg feed, had no effect on feed intake, bodyweight gain, egg weight or efficiency of lysine utilisation, but reduced the crude protein content in the diet up to 3.3 percentage units and improved the efficiency of protein utilisation by 22.3%. However, for each extra gram of dietary free amino acid content/kg diet, the rate of lay and egg output decreased by 3.0% and 2.5 g per day, respectively, and the efficiency of methionine utilisation decreased by 4.3%. There was no interaction between frequency of feeding and amino acid supplementation. These results suggest that free amino acids are not utilised by broiler breeders.

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“…Our data indicated that quadratic-plateau model resulted in Fisher (1998) suggested that lysine intake requirement for maximum egg production from 27 to 33 week of age might be 893 mg based on the 'Reading model'. NRC (1994) recommendations for daily lysine intake in meat-type breeder hens was 765 mg. Harms and Ivey (1992) proposed the total lysine requirement to maximize egg production at 824 mg with a daily protein intake of 18.55 g. Harms and Russell (1995) reported total lysine requirement of 845 mg for maximum egg production, egg mass and egg content when daily intake of 18.07 g protein was provided.…”

Section: Resultsmentioning

confidence: 76%

“…These differences between previous (Harms and Ivey, 1992; Harms and Russell, 1995;Fisher, 1998) and recent studies of lysine requirement could be partially explained improvement of genetic potential in broiler breeders would necessarily require more nutrients (Hayes et al, 2013). The strains with greater growth rate should have higher nutrients needs for their muscle development .…”

Section: Resultsmentioning

confidence: 91%

Feeding a Diet with Precise Lysine Level improved Laying Performance and Feed Efficiency of Broiler Breeder Hens at the Early Laying Stage

Kim¹,

Rew²,

Wickramasuriya³

et al. 2017

Korean J. Poult. Sci.

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A dose-response experiment was conducted to determine the lysine requirement for broiler breeder hens during pre-peak production. Totally, one hundred and twenty-six flock 23-week-old Ross 308 broiler breeder hens with similar body weight were selected (2,188±32 g) for a 6-week experiment. Hens were fed with a basal diet of corn-wheat-soybean meal formulated to achieve the Ross 308 breeder nutrient specifications (2016), except for lysine. The 7 graded, daily lysine intake levels used in this experiment were 732, 785, 838, 891, 944, 997, and 1,050 mg, and hens were restricted to 133 g of feed throughout this experiment. Pen based egg production were recorded once a day and all eggs were weighed daily. Age at sexual maturity was determined when the hens attained age at 25% production. Body weight at 23∼29 weeks of age was not affected (P>0.05) by lysine levels. By fitting a linear-plateau model, the daily lysine requirements for feed conversion ratio, total produced egg weight, and age at sexual maturity at 23∼29 weeks of age were estimated as 865, 907, and 891 mg, respectively. Using a quadratic-plateau model, the daily lysine requirement at 23∼29 weeks of age were estimated as 974, 964, and 950 mg for feed conversion ratio, total produced egg weight, and age at sexual maturity, respectively. These results suggested that the daily lysine requirement for modern broiler breeder hens according to the National Research Council (1994) are insufficient for higher total produced egg weight, sexual maturity, and feed efficiency, and 120% of the NRC recommendation level would improve hen productivity when data are fitted under linear-and quadratic-plateau models.(Key words: broiler breeders, linear-plateau model, lysine requirement, quadratic-plateau model)

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Lysine: Amino acid requirements of broiler breeders

Cited by 45 publications

References 20 publications

Dietary methionine source and level affect hepatic sulfur amino acid metabolism of broiler breeder hens

Dietary methionine source and level affect hepatic sulfur amino acid metabolism of broiler breeder hens

Utilisation of synthetic amino acids by broiler breeder hens

Feeding a Diet with Precise Lysine Level improved Laying Performance and Feed Efficiency of Broiler Breeder Hens at the Early Laying Stage

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