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\hypersetup{pdftitle={Phenotypic Body Measurements as Predictors of Body Weight in Butana Cattle Ecotype under Field Conditions in Sudan},pdfauthor={Ahmed Musa, Mohamed Khair Abdalla Ahmed, Nahid Idam, Khalid Elamin},pdfsubject={Tropentag 2016: Abstract},pdfkeywords={Butana cattle, correlations, phenotypic measurements, prediction, Sudan},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 18-21, 2016, Vienna, Austria}}\\[1ex] \Large{``Solidarity in a competing world ---\\fair use of resources''\\[2ex]}}
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\Large{\textbf{Phenotypic Body Measurements as Predictors of Body Weight in Butana Cattle Ecotype under Field Conditions in Sudan\footnote{\textbf{Contact Address:} Ahmed Musa, University of Gezira, Genetics and Animal Breeding (Molecular Genetics), Elgamaa, Wad Medani, Sudan, \mbox{e-mail}: \email{ahmed.musa12@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Ahmed Musa$^{1}$, Mohamed Khair Abdalla Ahmed$^{2}$, Nahid Idam$^{3}$, Khalid Elamin$^{2}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$University of Gezira, Genetics and Animal Breeding (Molecular Genetics), Sudan}}}
\item[]{\small{\textit{$^{2}$University of Khartoum, Animal Genetics and Breeding, Sudan}}}
\item[]{\small{\textit{$^{3}$University of Gezira, Animal Physiology and Biochemistry, Sudan}}}
\end{itemize*}
\index[author]{Musa, Ahmed}
\index[author]{Abdalla Ahmed, Mohamed Khair}
\index[author]{Idam, Nahid}
\index[author]{Elamin, Khalid}
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Data on body weight (Bwt) and phenotypic body measurements; heart girth (HG), Body length (BL) and height at withers (HTWs) were individually collected from mature (N = 200, males (n) = 50 and females (n) = 150) Butana cattle ecotype that thrive under field conditions in Butana area of Sudan between October and March 2013. The aims of the study were to: (1) determinate certain phenotypic body measurements, (2) evaluate the effect of sex on the body weight and phenotypic body measurements, (3) establish associations between body weight and phenotypic body measurements and (4) predict body weight from phenotypic body measurements in Butana cattle ecotype by statistical analysis models. Data collected were subjected to least squares analysis using general linear model procedures when phenotypic body measurements (cm) and animal body weight (kg) were outcome variables and animal sex as input variable, simple linear Pearson's correlation and regression analysis were performed. Findings indicated that males showed higher values for body weight and phenotypic body measurements ($P<0.05$) than females, the correlation coefficients (r) between body weights and heart girth measurements (r = 0.90 for males and 0.98 for females) were strong, positive in direction and significant ($P<0.001$). Simple linear regression models were fitted ($P<0.05$) with body weight as dependent variable and heart girth as independent variable. Body weight had a linear relationship with heart girth (R$^{2}$ = 0.81 and 0.96) for males and females respectively. The coefficient of determination indicated that heart girth measurement succeed to describes more variation in body weight. Thus, heart girth taken with a tape is the phenotypic body measurement that is most appropriate for prediction of body weight more accurately in Butana cattle ecotype under field conditions in Sudan. Results obtained in present study would also be valuable, useful and helpful to animal breeder and farmers under field conditions who are involved in cattle breeding.}

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\noindent \textbf{Keywords:} Butana cattle, correlations, phenotypic measurements, prediction, Sudan
\index[key]{Butana cattle}
\index[key]{Sudan}
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