Inheritance of Body Weight in Japanese Quail

Sefton, A. E.; Siegel, P. B.

doi:10.3382/ps.0531597

Cited by 38 publications

(29 citation statements)

References 11 publications

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“…Heritability estimates for body weight and carcass traits in this study are within the range of the estimates in the literature (Sefton and Siegel, 1974, Leenstra and Pit, 1988., Zerehdaran et al, 2005and N'dri et al, 2005. The higher heritability estimates for BW and carcass traits from dam component than those from sire component in the present study may indicate the contribution of dominance deviation or common environment particularly maternal effect (Falconer and Mackay, 1996).…”

Section: Discussionsupporting

confidence: 71%

Genetic variability of body composition traits in Sudanese Native large Beladi Chicken

Khalid¹,

Yousif²

2012

ABJNA

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This work was conducted to estimate the genetic and phenotypic parameters for body weight, carcass traits and visceral portions of the native large Beladi chicken. Data set consisted of 1114 observations obtained from 50 sires and 150 dams were analyzed using Harvey's SLMLMW (1990) to obtain variance and covariance components for genetic parameters estimates. The average body weight at twelve weeks of age (800.74± 162.98g) was lower than that of exotic strains at slaughter age. The results exhibited significant differences between sexes for all traits measured with males being heavier than females. As proportion of body weight at 12 weeks of age the hot carcass weight was 63.30 percent, whereas breast, thigh, drum and leg constituted 24.60, 15.50, 14.70 and 30.10 percents of the cold carcass weight respectively. Moreover, the abdominal fat, gizzard, heart, liver and shanks represented 0.72, 2.4, 0.55, 2.38 and 4.04 percents of live body weight at 12 weeks of age respectively. The heritability estimates for body weight at 12 weeks of age and carcass traits ranged from moderate to high. This indicates the possibility of improving these traits in local chicken using selection procedures. The heritability estimates for visceral portions were low. The genetic correlation estimates for body weight and carcass traits, body weight and abdominal fat and carcass weight and abdominal fat were high and positive. Therefore attempts to improve body weight in indigenous chicken may lead to concomitant increase in carcass traits including abdominal fat.

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Section: Discussionsupporting

confidence: 71%

Genetic variability of body composition traits in Sudanese Native large Beladi Chicken

Khalid¹,

Yousif²

2012

ABJNA

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“…For body weight, heritabilities in males tended to be higher than in females, which has been previously reported by Sefton & Siegel, 1974. This was especially true for females in the ad libitum fed treatment that started reproduction during the experiment.…”

Section: (Ii) Heritabilities Of Growth Curve Parameters and Final Sizesupporting

confidence: 58%

“…This was especially true for females in the ad libitum fed treatment that started reproduction during the experiment. Female weight during puberty is complicated by the growth of ovaries and other reproductive tissues (Sefton & Siegel, 1974). In ad libitum fed females puberty started as early as day 34.…”

Section: (Ii) Heritabilities Of Growth Curve Parameters and Final Sizementioning

confidence: 99%

Heritabilities of growth curve parameters and age-specific expression of genetic variation under two different feeding regimes in Japanese quail (Coturnix coturnix japonica)

Gebhardt-Henrich

Marks

1993

Genet. Res.

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This study investigated genetic variation in growth and final size in relationship to differences in heritabilities under good and poor feeding conditions. Heritabilities of growth and final size were estimated for several traits under ad libitum and restricted feeding conditions. A 30 % feed restriction from hatching to 44 days of age in Japanese quail chicks decreased body weight and tarsus length at 44 days of age and the length of the third primary covert feather at 24 days of age relative to controls fed ad libitum. Wing length at 44 days of age was not significantly different for ad libitum fed and restricted quail. Genetic variances for body weight and tarsus length were very large throughout growth which resulted in heritability estimates close to one for these traits. The genetic correlations among feeding treatments were low, indicating that different genes were affecting growth under the two treatments. Growth was described by the components: asymptote, growth period, and shape of the growth curve following the modified Richards growth curve model (Brisbin et al. 1986). Tarsus length, which had high heritability of the parameter 'growth period' of the model, tended to display a higher heritability under the restriction than under ad libitum feeding. Body weight and feather length, which had either no heritable or low heritable ' growth periods' estimates, tended to be more heritable under ad libitum feeding. The shape parameter of the growth curve was not heritable for any trait, except tarsus length under restricted feeding.

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“…Estimates of the heritability of body weight at four weeks of age in Coturnix ranged from .22 to .79 in males and .17 to .65 in females (Yoshida and Collins, 1967;Marks and Lepore, 1968;Marks, 1971;Sefton and Siegel, 1974). The unweighted averages were .39 for males and .42 for females.…”

Section: Introductionmentioning

confidence: 99%

Inheritance of Egg Production, Egg Weight, Body Weight and Certain Plasma Constituents in Coturnix

1978

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In females from a randombred line of Coturnix, egg weight and 70 day egg production were estimated to be of moderate (.20 to .40) to high (greater than .40) heritability, but were influenced greatly by maternal and/or nonadditive genetic effects. Estimates of the heritability of body weight at sexual maturity were low (less than .20) from the paternal half-sister correlation, but greater than 1.0 from the maternal half-sister correlation. Plasma concentrations of a lipophosphoprotein complex (LPP) and total calcium were estimated to be of low heritability, while plasma total phosphorus concentration was moderately heritable.Plasma LPP, total calcium and total phosphorus concentrations were positively correlated genetically and phenotypically with each other and negatively correlated genetically with egg production. The phenotypic correlations between the plasma constituents and egg production were not significant. Body weight was negatively correlated genetically with plasma LPP and egg production but positively correlated with plasma total phosphorus. Calculations of correlated responses to selection indicated that selection for decreased plasma LPP concentration might improve egg production without depressing body weight.The average plasma LPP concentration was 11.5 ± .6 mg./ml. Total plasma calcium concentration (19.4 ± .2 mg.%) was similar to that reported for chickens and turkeys, while total plasma phosphorus concentration (799 ± 8 Mg./ml.) was higher than reports for other avian species.Several estimates of the heritability of body weight in Coturnix have been published, while 1 at

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Inheritance of Body Weight in Japanese Quail

Cited by 38 publications

References 11 publications

Genetic variability of body composition traits in Sudanese Native large Beladi Chicken

Genetic variability of body composition traits in Sudanese Native large Beladi Chicken

Heritabilities of growth curve parameters and age-specific expression of genetic variation under two different feeding regimes in Japanese quail (Coturnix coturnix japonica)

Inheritance of Egg Production, Egg Weight, Body Weight and Certain Plasma Constituents in Coturnix

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