A description of the potential growth and body composition of two commercial broiler strains

Vargas, Larissa Braganholo; Sakomura, Nilva Kazue; Leme, Bruno Balbino; Antayhua, F A P; Reis, Matheus de Paula; Gous, R. M.; Fisher, C.

doi:10.1080/00071668.2020.1716300

Cited by 14 publications

(14 citation statements)

References 21 publications

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“…This is probably because different diets could only influence the growth rate of animals (K) but not the weight at maturity (Eleroğlu et al, 2018). The parameter A (5.825 kg) determined in the present study differed from obtained by Vargas et al (2020), who evaluated the growth of Cobb 500 male broilers using the Gompertz model and obtained a maximum weight of 8.416 kg. The difference in these results is because in the present study the weight of birds was measured only until 42 days of age, while Vargas et al (2020) weighed the broilers until 112 days of age, modifying the Gompertz parameters.…”

Section: Resultscontrasting

confidence: 82%

Growth curves of broilers fed different nutritional relationships using the Gompertz model

Freitas

Bertechini

Clemente

et al. 2022

Acta Sci. Anim. Sci.

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The study aimed to evaluate performance and growth curves of broilers fed different nutritional relations. A total of 1,440 Cobb-500 male day-old chicks were assigned to eight treatments in a 2 x 2 x 2 factorial arrangement with six replicates of 30 birds each. The main factors were nutritional density (control and high), lysine source (HCl and sulfate), and calcium pidolate (presence and absence). Analyses were made for body weight gain (BWG), and feed conversion rate (FCR) at 21, and 42 days of age. The growth curves were adjusted by weighing a bird per plot every three days. Data for BWG were tested by ANOVA to evaluate the effects of treatments and their interactions at 5% significance, and the Gompertz model was adjusted by NLS. Birds fed a high nutritional density had higher BWG and lower FCR. Calcium pidolate and different sources of lysine did not influence the FCR of broilers, however a triple interaction was evidenced for BWG at 1 to 42 days of age. The day with maximum gain adjusted by Gompertz of all treatments was at the 32nd day of age and the maximum weight (A) was around 5.85 kg.

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Section: Resultscontrasting

confidence: 82%

Growth curves of broilers fed different nutritional relationships using the Gompertz model

Freitas

Bertechini

Clemente

et al. 2022

Acta Sci. Anim. Sci.

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“…As expected, male's birds, in AA line, had significantly higher abdominal fat pad, wings with bones, leg muscles, breast muscles, and carcass weights and percentages compared to females from the same line and females and males from Cairo B-2 line. The differences in productive performance at market age will be higher in males than females in modern broiler as reported privously by Vargas et al, (2020). Moreover, a higher significant interaction of genotype and sex was observed for carcass yield in AA line compared with Cairo B-2 line as shown in table 2.…”

Section: Carcass Traits and Meat Yield At 42 Days Of Age In Cairo B-2 And Aa Linesmentioning

confidence: 74%

Genetic Diversity of the Major Histocompatibility Complex by Using Lei0258 Microsatellite Marker Associated With Productive Performance and Viral Diseases in Broiler Breeders

Nassar

2021

EPSJ

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The chicken Major Histocompatibility Complex (MHC) is closely related to resistance to several diseases. Moreover, selection for genetic resistance to diseases is a critical goal in the broiler breeding companies, which should be carefully balanced with different economic traits, including live body weight (LBW) and meat yield. The microsatellite marker LEI0258 is used to evaluate the effect of selection for 12 generations for high LBW at 6 weeks of age (LBW6) with natural selection against Marek disease (MD) on genetic component associated with resistance to MD and Newcastle diseases (ND) in local broiler breeders, Cairo B-2 line, compared to commercial broiler breeder line (AA line). Results indicated that, Cairo B-2 line had lower carcass parts with higher internal organs percentages compared to AA line. In addition, there was a positive association between 473 bp allele of LEI0258 with regard to LBW6 and carcass traits in two lines. Moreover, LEI0258 alleles 357 bp and 295 bp were present with high content in Cairo B-2 line only, which increased the genetic resistance to Marek's disease and increased the humoral immune response against ND vaccination in Cairo B-2 line compared to AA line. The correlations between these valuable productive traits and LEI0258 microsatellite will effectively assist the selection process by applying Marker-Assisted Selection in Cairo B-2 line breeding program in the future.

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“…The differential in mature weight between males and females in the turkey strain used here (Hybrid Converter) is considerably greater than that in commercial broiler genotypes. For example, the weight of turkey females at maturity was 54% of the male weight (18.7 vs 34.6 kg), whereas broiler females at maturity weigh close to 80% of the male weight (6.7 vs 8.4 kg) (Vargas et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Differences in growth and carcass composition of growing male and female turkeys

Tůmová¹,

Gous²,

Chodová³

et al. 2020

Czech J. Anim. Sci.

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An experiment was conducted with 1 680 one-day-old turkey poults (720 males and 960 females) of the Hybrid Converter<sup>TM</sup> genotype to compare the growth performance of male and female turkeys. The experiment lasted until 119 days of age for males and 126 days for females, during which 6 commercial-type feeds were administered, with changes occurring at 21, 42, 63, 84 and 102 days of age. Performance was evaluated by weekly weighing and measuring feed consumption in each pen at weekly intervals. At 1, 7, 14, 21, 35, 56, 77, 119 (males) and 126 (female) days, 12 birds from each sex were sampled for weights of carcass, liver, gizzard, heart, thighs and breast. The Gompertz equation fitted separately to male and female growth data suggested that the mature weight of males would be by 16 kg heavier than in females (34.6 vs 18.7 kg) and that the females would mature 36% faster than males (0.023 2 vs 0.017 0/day). The weights of liver, gizzard and heart were similar in males and females in the early part of the growth period but they diverged from 35 days for the gizzard, 56 days for the liver and 77 days for the heart. However, the allometric coefficients describing the growth of each of these internal organs in relation to body weight were the same for males and females. Thigh weight was allometrically related to body weight, with males and females sharing the same relationship, but although the slope of the allometric relationship for breast weight in males and females was the same, breast weights in females were heavier than in males at any given body weight. Female turkeys became fatter than males from 56 days onwards.

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A description of the potential growth and body composition of two commercial broiler strains

Cited by 14 publications

References 21 publications

Growth curves of broilers fed different nutritional relationships using the Gompertz model

Growth curves of broilers fed different nutritional relationships using the Gompertz model

Genetic Diversity of the Major Histocompatibility Complex by Using Lei0258 Microsatellite Marker Associated With Productive Performance and Viral Diseases in Broiler Breeders

Differences in growth and carcass composition of growing male and female turkeys

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A description of the potential growth and body composition of two commercial broiler strains

Cited by 14 publications

References 21 publications

Growth curves of broilers fed different nutritional relationships using the Gompertz model

Growth curves of broilers fed different nutritional relationships using the Gompertz model

Genetic Diversity of the Major Histocompatibility Complex by Using Lei0258 Microsatellite Marker Associated With Productive Performance and Viral Diseases in Broiler Breeders

Differences in growth and carcass composition of growing male and female turkeys

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Differences in growth and carcass composition of growing male and female turkeys