Comparative analyses of growth response and genetic parameter estimates of some quantitative traits in three broiler strains in South-West, Nigeria

Sanda, A. J.; Olowofeso, O.; Adeleke, M. A.; Oso, A. O.; Durosaro, Samuel O.; Sanda, M. O.

doi:10.51791/njap.v41i2.2399

Cited by 3 publications

(3 citation statements)

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“…The moderate to fairly high heritability and repeatability estimates obtained at 4 weeks for both sexes showed that environmental influence on these traits was reduced compared to the results obtained at 2 weeks of age. The heritability estimates obtained in this study were higher than what Sanda et al [14] reported in their study. Kabir et al [4] and Ubani et al [15] reported moderate to high estimates of repeatability in linear body measurements in broiler chickens.…”

Section: Body Weight and Linear Body Measurements At 4 Weeks Of Agecontrasting

confidence: 85%

Influence of Sexual Dimorphism on Genetic Parameters of Arbor Acre Chicken

2022

Sci. Lett.

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The study was conducted to determine the extent of the effect of sexual dimorphism on the body weight and linear traits of Arbor Acre chickens. Hundred-day-old Arbor Acre broiler chicks comprising fifty-two males and forty-eight females were used in this study. Day-old birds were winged tagged and were given feed and water ad libitum. Bi-weekly body weight and linear body measurements, namely, wing length, shank length, thigh length, comb length, back length, breast girth and keel length were measured. In addition, the heritability and repeatability of the measured traits were estimated. The results showed that body weight increased as age increased with male chickens having the superior final weight at 8 weeks over their female counterpart. Among the linear body measurement, shank length increased at a rapid rate more than other linear body traits followed by the back length and keel length. The heritability and repeatability estimates ranged from moderate during the early growth phase to high during the later growth phase of 5 and 8 weeks. The study concludes that male Arbor Acre male chickens attained higher weight than the females after eight weeks of growth. Similarly, shank length and back length were good linear body measurements for predicting body weight for selection purposes.

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Section: Body Weight and Linear Body Measurements At 4 Weeks Of Agecontrasting

confidence: 85%

Influence of Sexual Dimorphism on Genetic Parameters of Arbor Acre Chicken

2022

Sci. Lett.

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“…Negative genetic and phenotypic association observed between these traits in both male and female lines could be attributed to the presence of additive and maternal gene effect for these traits. Sanda et al (2014) reported negative genetic and phenotypic correlations between egg weight and egg production up to 280days. The result of this work further corresponds with the findings of Sulaiman, (2022).…”

Section: Egg Weight With Egg Production Up To 280 Daysmentioning

confidence: 99%

Correlations Amongst Traits of Economic Importance in Layer Type Chickens Under Reciprocal Recurrent Selection

Yahaya¹,

Oni²,

Adeyinka³

2023

FUDMAJAAT

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The objective of this study was to estimate genetic and phenotypic correlations amongst traits in layer type chickens under reciprocal recurrent selection. Matings within pure male line and female lines were carried out to produce purebred male line (AA x AA) and female line (BB x BB). A total of 364 pullets arising from 207 hens and 23 cocks in generation 1 and 440 pullets from 70 hens and 10 cocks in generation 2 under selection were monitored in individual cage units for part period egg production up to 280 days. Parameters considered were age at sexual maturity (ASM), body weight at 20 and 40 weeks (BW 20 and BW40), egg weight average (EWTAV) and egg production up to 280 days (Egg 280). Results obtained shows that ASM had a high negative genetic (-0.52 to -0.64) and moderate phenotypic (-0.39 to -0,46) correlations with BW20 in the male line, positive genetic and phenotypic correlations with EWTAV in both male (0.41 to 0.80 and 0.07 to 0.26) and female line (0.53 and 0.09 to 0.14) and negative genetic and phenotypic correlations in both male (0.45 to -0.65 and -0.08 to -0.53) and female (-0.37 and -0.20), lines, respectively. Similarly, BW40 had positive genetic and phenotypic correlations (0.68 to 0.93 and 0.01 to 0.20) with Egg-280 in the female line. EWTAV had a negative genetic and phenotypic correlation with Egg280 in both male (-0.53 to -0.96 and -0.09 to -0.17) and female line (-0.15 to -0.27 and -0.09 to -0.15), respectively. It was concluded that the favourable correlations that exist between traits measured in this study for both male and female lines indicate the presence of non-additive genetic effects which can be utilized through selection and crossing for commercial use.

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“…By so doing, it reduces the interdependency or multicollinearity among independent variables which has been shown to be associated with unstable estimates of regression coefficients (Keskin et al 2007;Yakubu et al 2009) that reduces the accuracy of prediction (Chatterjee et al 2000). The reliability of prediction is reported to depend on positive or negative linear relationship between the dependent variable and the predictors (Semakula et al, 2011;Ojedapo, 2012;Sanda et al 2014) as well as the magnitude of the coefficient of determination. The coefficient of determination explains the total variation in a dependent variable that is accounted for by the explanatory variables or predictors in a linear regression model (Agomy et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Linear Models for Predicting Body Weight of Crossbred Chickens

Isaac¹,

Adeolu²

2023

IJRIAS

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Prediction of body weight with linear body measurements of 531day-old crossbred chickens was determined by stepwise regression analysis for mixed sexes at 4 and 8 weeks and separate sexes at 12, 16 and 20 weeks. Shank length was the best single predictor of body weight in Isa Brown x naked neck (IBxNa) at 4 weeks (coefficient of determination, R2 = 65%) and in feathered x Isa Brown (FxIB) at 8 weeks (R2 = 96%). In males, body weight was best predicted by drumstick length (DL) in IBxNa (R2 = 90%) at 12 weeks and in Isa Brown x frizzle feathered (IBxF) at 16 (R2 = 85%) and 20 (R2 = 81%) weeks. The best single predictors of body weight in females were body length (BL) (R2 = 91%), body girth (BG) (R2 = 90%) and body width (BW) (R2 = 90%) in naked neck x Isa Brown (NaxIB) at 12, 16 and 20 weeks, respectively. The best partial predictors of body weight were BG and wing length at 4 weeks (R2 =97%) and BG, BL and keel length (KL) at 8 weeks (R2 =97%) in IBxF; BW and DL (R2 =76%) in normal feathered x Isa Brown (NxIB) males at 16 weeks and BW and DL (R2 =97%) in NxIB females at 20 weeks. The higher R2 values obtained in the models for females made prediction of their body weight more accurate than that of the males. In general, the R2 of mixed sexes ranged from 50-97% and 62-97% at 4 and 8 weeks and for males and females, it ranged from 50-90% and 57-91%; 51-85% and 53-90%; 49-81% and 51-90% at 12, 16 and 20 weeks, respectively. Body weight was best predicted at 8 weeks, and irrespective of genotype, sex and age, the best predictors in single or partial state were BG, BL, KL, BW and DL.

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Comparative analyses of growth response and genetic parameter estimates of some quantitative traits in three broiler strains in South-West, Nigeria

Cited by 3 publications

References 0 publications

Influence of Sexual Dimorphism on Genetic Parameters of Arbor Acre Chicken

Influence of Sexual Dimorphism on Genetic Parameters of Arbor Acre Chicken

Correlations Amongst Traits of Economic Importance in Layer Type Chickens Under Reciprocal Recurrent Selection

Linear Models for Predicting Body Weight of Crossbred Chickens

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