Feathering rate impact on growth and slaughter traits of Japanese quail

Mahmoud, B. Y. F.; Hafez, A. S. Abdel; Emam, Ahmed M.; Abdelmoniem, A. M.; El-Safty, S. A.

doi:10.1017/s0021859618000990

Cited by 5 publications

(5 citation statements)

References 26 publications

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“…The average 5-week-old weight value for Japanese quails in this study is consistent with the findings of some researchers [14,[23][24][25][26], who found the 5-week-old weight of the quails to be between 179.07 g and 190.00 g, which has not been conducted in any genetic improvement study before. Likewise, the mean value for 6-week-old weight found in this study is consistent with the values (200.13-232.4) reported by Lotfi et al [27], Karaman et al [28], and Shafik et al [29].…”

Section: Discussionsupporting

confidence: 92%

Genetic Parameter Estimates of Growth Curve and Feed Efficiency Traits in Japanese Quail

Başar

Narinç

2023

Animals

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This study aimed to estimate heritabilities for weekly body weight traits, the Gompertz growth curve parameters, and feed efficiency characteristics, as well as genetic correlations among characteristics. A total of 700 Japanese quails with pedigree records were used in this study. Body weight and feed consumption were measured individually on a weekly basis. Using weekly body weight data, the growth model parameters were estimated for each bird using the Gompertz nonlinear regression model. Multi-trait variance-covariance matrices were obtained with Bayesian inference using the Gibbs sampler. While estimates of high heritability (0.59 to 0.61) were found for weekly body weight traits, estimates of moderate heritability (0.23 to 0.37) were determined for feed intake and feed conversion efficiency traits. The estimated heritabilities for the parameters of the Gompertz model and inflection point coordinates were moderate (0.37 to 0.47). While genetic correlations between feed intake and body weight characteristics were positive and moderate (0.28 to 0.49), the genetic correlations between feed conversion efficiency and body weight traits were positive and strong (0.52 to 0.83). It has been concluded that the moderate negative genetic relationship between feed conversion efficiency and body weight may constrain selection studies. Due to the weak genetic correlation between the asymptotic body weight parameter of the Gompertz model and the feed conversion efficiency, it is thought that the total genetic gain will be greater if the mature weight parameter is also used as a selection criterion in genetic improvement studies.

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Section: Discussionsupporting

confidence: 92%

Genetic Parameter Estimates of Growth Curve and Feed Efficiency Traits in Japanese Quail

Başar

Narinç

2023

Animals

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“…Quails of the selected line significantly had higher carcass %, dressing %, weights of giblets, heart, gizzard and liver (+3.65%, +2.59, 23.79, 68.42, 13.21 and 23.47% respectively) than the CL as shown in Table 4. Similar trend of significant line effect on carcass% was reported by Mahmoud et al (2018). However, Khaldari et al (2010) reported insignificant differences due to lines for carcass%.…”

Section: Performance Of Some Carcass Traits: Line Effect On Carcass Tsupporting

confidence: 74%

“…Selection for high BW42 and GR1-42 significantly improved carcass%, dressing% and boneless meat % of Japanese quail, also the HGR1-42 line had higher carcass%, dressing% and BLM% than other lines as reported by Mahmoud (2006). Mahmoud et al (2018) found significant differences due to lines for dressing%.…”

Section: Performance Of Some Carcass Traits: Line Effect On Carcass Tmentioning

confidence: 91%

Effects of Selection for Increasing Early Growth Rate on Growth and Carcass Characteristics of Japanese Quail

Emam

2020

EPSJ

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This study aimed to investigate the effects of selection for high early growth rate during 1-21 days of age (GR1-21) on growth traits, some plasma constituent and carcass characteristics. An experiment was carried out at the farm of the Poultry Research Center, Faculty of Agriculture, Fayoum University and continued for six generations including 10,024 for two lines (the selected line, HGR1-21 and the control line, CL) of Japanese quail chicks. The HGR1-21 had better BW21, BW35, GR1-21, GR1-35 and BWG1-35 than the CL. Generation of selection significantly affected all growth traits. Females had significantly higher BW21, BW35, BWG1-35 and GR1-35 than males. Quails of HGR1-21 had lower high density lipoprotein (HDL) and higher triglycerides (TG) than the CL. Females had higher TG and lower HDL than males. Quails of HGR1-21 had higher carcass %, dressing %, weights of giblets, heart, gizzard and liver than CL by 3.65%, 2.59, 23.79, 68.42, 13.21 and 23.47%, respectively. Females had higher weights of giblets, gizzard and liver than males by +12.41%, 14.64% and 12.34%, respectively. The HGR1-21 had higher ether extract % (+24. 28%) and lower moisture% (-4.79%) than the CL. GR1-21 showed moderate heritability (h 2 ) of 0.28 and ranged from 0.20 to 0.29 for growth traits. The GR1-21 found to be positively genetic and phenotypic correlated (rg & rp) with BW21, BW35, BWG1-35 and GR1-35, with rg ranged from moderate to high (0.24 to 0.70) and rp ranged from low to medium (0.03 to 0.41), however there were negative rg and rp between GR1-21 and BW1 being -0.15 and -0.50,respectively. Genetic response showed superiority of the selected line than the control (P< 0.05) for selection criteria (+0.04) .Selection for GR1-21 had desired genetic gain with all studied growth traits, except BW1. Also, carcass traits and vital organs were improved due to selection for GR1-21.

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“…Furthermore, Taskin et al [ 36 ] found that across selection generations, sex was a substantial source of variance for BW at all ages. On the contrary, Mahmoud et al [ 37 ] found an insignificant sex effect on BW at all ages. In addition, treated quails showed significantly faster GR14–21 and GR14–42 than the untreated group; Zhu et al [ 25 ] and Wei et al [ 26 ] reported similar trends in ducks and chickens.…”

Section: Discussionmentioning

confidence: 90%

Influence of Improved Microclimate Conditions on Growth and Physiological Performance of Two Japanese Quail Lines

Emam

Elnesr

El-Full

et al. 2023

Animals

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Microclimate parameters (ammonia, ambient temperature, heat index, and relative humidity) surrounding birds affect the production and health status of poultry. Therefore, this study aimed to evaluate the impact of adding natural zeolite to the litter of Japanese quail on improving microclimate parameters and its reflection in growth performance, blood gases, and blood biochemical parameters. A total of 1152 chicks were obtained from the same hatch at the 20th selection generation. Chicks were allocated into two groups based on the litter composition: Group 1: wheat straw as litter (untreated group); Group 2: 80% wheat straw + 20% zeolite (treated group). Each group consisted of 576 chicks: 410 selected line chicks and 166 control line chicks. Significant and favorable effects of the treatment on microclimate parameters during tested periods were found to favor the treated group. Either the treated group or the selected line had significantly better growth performance than the untreated group and control line. Zeolite-treated quails had significantly desirable blood gases and lower blood acidity and serum total iron binding capacity compared to the untreated group. Thus, adding natural zeolite to the litter enhanced the microclimate parameters that improved growth performance, blood gases, and blood biochemical parameters and reduced ammonia emission.

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Feathering rate impact on growth and slaughter traits of Japanese quail

Cited by 5 publications

References 26 publications

Genetic Parameter Estimates of Growth Curve and Feed Efficiency Traits in Japanese Quail

Genetic Parameter Estimates of Growth Curve and Feed Efficiency Traits in Japanese Quail

Effects of Selection for Increasing Early Growth Rate on Growth and Carcass Characteristics of Japanese Quail

Influence of Improved Microclimate Conditions on Growth and Physiological Performance of Two Japanese Quail Lines

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