Statistical Modelling of Body Weight and Linear Body Measurements in Nigerian Indigenous Chicken

Ukwu, H. O.; Okoro, V. M. O.; Nosike, R. J.

doi:10.9790/2380-07152730

Cited by 13 publications

(7 citation statements)

References 5 publications

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“…This indicates that nearly 60 percent of the variance in BW was explained by SL thus this body measurement could be used as a single most important predictor of BW. Similar observations were reported in Nigerian indigenous chickens (Ukwu et al, 2014), and Japanese quail (Gambo et al, 2014). A combination of SL with one or more of other measurements (BL, CC, and SC) generally improved the predictive power of the equations.…”

Section: Resultssupporting

confidence: 85%

“…The strong correlation between BW and SL has also been observed for indigenous chickens of Nigeria (Ukwu et al, 2014), French broiler guinea fowl in Nigeria (Dzungwe et al, 2018), and naked neck chickens of South Africa (Alabi et al, 2012). On the contrary, BW was strongly correlated with BL (r = 0.87) and CC (r = 0.85) in Muscovy duck (Raji et al, 2009), SC in Venda and Potchefstroom koekoek chickens of South Africa (Alabi et al, 2012), and BL in Nigerian indigenous chickens (Egena et al, 2014).…”

Section: Resultsmentioning

confidence: 61%

“…Elsewhere, a strong relationship between BW and chest circumference (Semakula et al, 2011), shank length (Alabi et al, 2012;Ukwu et al, 2014), shank circumference (Alabi et al, 2012), and body length (Egena et al, 2014) have been reported for indigenous chicken populations. These studies indicated that these body measurements are useful and reliable predictors of BW in chickens.…”

Section: Introductionmentioning

confidence: 99%

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Predicting Body Weight of Ethiopian Indigenous Chicken Populations from Morphometric Measurements

Negash¹

2021

Turkish JAF Sci.Tech.

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The purpose of this study was to estimate the relationship between body weight (BW) and morphometric measurements of Ethiopian indigenous chicken populations and to develop prediction equations used to estimate BW from body measurements. A total of 621 chickens comprising 134 males and 487 females reared under smallholder management conditions were used for the study. Body weight and morphometric measurements including body length (BL), chest circumference (CC), shank length (SL), and shank circumference (SC) were taken using a hanging scale and a textile measuring tape, respectively. The relationship between BW and morphometric measurements was determined using Pearson’s correlation coefficients (r) and stepwise multiple regression analyses. Descriptive statistics indicated that male birds were heavier than female birds. Correlation results revealed that body weight was significantly and strongly correlated with SL (r = 0.76) in both sexes, and moderately correlated with SC (r = 0.69), BL (r = 0.67), and CC (r = 0.52) in male birds, BL (r=0.68) and SC (r = 0.59) in female birds. Compared to other measurements, SL best predicted BW in both male and female birds, with coefficients of determination (R2) = 0.58. Combining SL with other body measurements (BL, CC, and SC) generally improved the predictive power of the equation. Thus, multiple regression equations that included a combination of the four linear body measurements are more suitable for predicting BW of Ethiopian indigenous chicken populations.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

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Predicting Body Weight of Ethiopian Indigenous Chicken Populations from Morphometric Measurements

Negash¹

2021

Turkish JAF Sci.Tech.

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“…The highest positive phenotypic correlation estimates of body weight obtained with shank length at 10 weeks in IBxF, body width at 20 weeks in IBxNa and IBxN, drumstick length in FxIB at 20 weeks, keel length and shank length at 20 weeks in NxIB genotypes suggest that these traits could serve as best predictors and indirect selection criteria for body weight at these ages in their respective genotypes. Similarly, Ukwu et al (2014) and Nwaogwugwu et al (2018) had reported shank length and thigh length in chicken and quail, respectively as the best predictors of body weight based on their positive relationship. Kabir et al (2006) also obtained high and positive phenotypic correlation between shank length and body weight and opined that it was possible to predict body weight of live Rhode Island chickens on the basis of their shank length measurement.…”

Section: Phenotypic Correlationmentioning

confidence: 93%

Phenotypic, Genetic and Environmental Correlations Between Body Weight and Linear Body Traits of Chicken Genotypes

2021

Agrobiol. Records

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Data from 123, 49, 116, 137, 42 and 64 chickens belonging to Isa Brown x frizzle feathered (IBxF), Isa Brown x naked neck (IBxNa), Isa Brown x normal feathered (IBxN), frizzle feathered x Isa Brown (FxIB), naked neck x Isa Brown (NaxIB) and normal feathered x Isa Brown (NxIB) genotypes, respectively were used to establish phenotypic (rP), genetic (rG) and environmental (rE) correlations between body weight and linear body traits at 2, 10 and 20 weeks of age. Phenotypic correlations were analyzed by Pearson’s Product Moment method. Genetic and environmental correlations were estimated by covariance analysis. The highest rP estimates were obtained between body weight and shank length (SL) in IBxF (0.84) and NxIB (0.87) at 10 weeks, body width (BW) in IBxNa (0.84) and IBxN (0.72), drumstick length (DL) in FxIB (0.71) and NaxIB (0.88) at 20 weeks. Body weight had highest rG estimates with SL in NxIB (0.99), BW in IBxF (2.40), wing length (WL) in BxNa (0.91) and FxIB (7.39) at 10 weeks, body girth (BG) in IBxN (0.97) and BW of NaxIB (4.73) at 20 weeks. However, SL of IBxNa (-5.15), BG of NaxIB (-0.53), keel length (KL) of NxIB (0.35), WL of IBxF (-0.38) and FxIB (-1.41) at 2 weeks and WL of IBxN (-0.43) at 20 weeks had the least rE with body weight. Indirect selection of body weight using the highest phenotypic, genetic and lowest environmental correlated linear traits will result in rapid genetic improvement in these chickens.

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“…Most reports on chicken mainly focused on either pure breeds, crossbreds or mixed sexes (Gambo et al 2012;Ajayi et al 2008;Dzungwe et al 2018;Adenaike et al 2015) and not on combinations of genotypes, sexes and ages in chicken. Moreover, many authors who predicted body weight from linear body measurements of chickens used the entry method of multiple linear regression analysis (Ukwu et al 2014; Nosike et at. 2017; Ashwini et al 2019), which includes all predictors in a model, thereby increasing interdependency that reduces accuracy of prediction.…”

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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Statistical Modelling of Body Weight and Linear Body Measurements in Nigerian Indigenous Chicken

Cited by 13 publications

References 5 publications

Predicting Body Weight of Ethiopian Indigenous Chicken Populations from Morphometric Measurements

Predicting Body Weight of Ethiopian Indigenous Chicken Populations from Morphometric Measurements

Phenotypic, Genetic and Environmental Correlations Between Body Weight and Linear Body Traits of Chicken Genotypes

Linear Models for Predicting Body Weight of Crossbred Chickens

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