# Application of Ultrasonic Nondestructive Testing for Breeding of Meat Pigeons
## 3 Results
### Correlation Analyses Between BMT, BMW, BW, Breast Width, and BD  
As shown in Tables 2 and 3, BMW was significantly positively correlated with live BW, carcass weight, breast width, BD, and BMT at points A and B (\(p<0.05\)), with higher correlations between BMW and BMT at point A. Although breast width, BD, and BMW were also significantly positively correlated, the correlation coefficient was far lower than that between the BMT and BMW at point A.  
The results of correlation analysis showed that BMT at point A had the highest correlation with the BMW of the two breeds of meat pigeons (r = 0.907 and 0.897, respectively).  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Variety** & \begin{tabular}{c} **BMT at Point** \\ **A (mm)** \\ \end{tabular} & \begin{tabular}{c} **BMT at Point** \\ **B (mm)** \\ \end{tabular} & \begin{tabular}{c} **Breast Width** \\ **(mm)** \\ \end{tabular} & \begin{tabular}{c} **BD (mm)** \\ \end{tabular} & \begin{tabular}{c} **Live BW (g)** \\ \end{tabular} & \begin{tabular}{c} **Dressed** \\ **Weight (g)** \\ \end{tabular} & \begin{tabular}{c} **BMW (g)** \\ \end{tabular} \\ \hline \begin{tabular}{c} Carneau \\ pigeon \\ Silver King \\ pigeon \\ pigeon \\ \end{tabular} & \(15.30\pm 1.75\) & \(11.87\pm 1.69\) & \(66.73\pm 5.09\) & \(71.70\pm 2.95\) & \(524.51\pm 52.82\) & \(456.49\pm 48.18\) & \(95.19\pm 15.26\) \\ \
\begin{tabular}{c} Silver King \\ pigeon \\ \end{tabular} & \(14.71\pm 1.29\) & \(11.10\pm 1.40\) & \(62.64\pm 3.47\) & \(70.87\pm 3.11\) & \(478.26\pm 40.16\) & \(418.73\pm 35.63\) & \(85.23\pm 11.51\) \\
\begin{tabular}{c} \(p\) \\ \end{tabular} & 0.007 & 0.225 & 0.001 & 0.988 & 0.017 & 0.016 & 0.094 \\ \hline \hline \end{tabular} Note: \(p>0.05\) indicates no significant difference, \(p<0.05\) indicates a significant difference, and \(p<0.01\) indicates an extremely significant difference. The text continues here (Figure 2 and Table 2).  
\end{table}
Table 1: Body size and slaughter traits of two species of meat pigeons.  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Item** & **BMT at Point A** & **BMT at Point B** & **BMW** & **Breast Width** & **BD** & **Live BW** & **Dressed Weight** \\ \hline BMT at Point A & 1 & & & & & & & \\ BMT at Point B & 0.904 ** & 1 & & & & & & \\ BMW & 0.907 ** & 0.874 ** & 1 & & & & & \\ Breast width & 0.395 ** & 0.494 ** & 0.510 ** & 1 & & & & \\ BD & 0.187 & 0.213 * & 0.273 ** & 0.518 ** & 1 & & & \\ Live BW & 0.548 ** & 0.527 ** & 0.672 ** & 0.416 ** & 0.322 ** & 1 & & \\ Dressed & 0.665 ** & 0.638 ** & 0.711 ** & 0.476 ** & 0.359 ** & 0.967 ** & 1 \\ \hline \hline \end{tabular} Note: \({}^{*}p<0.05\); \({}^{**}p<0.01\).  
\end{table}
Table 2: Correlation analysis of slaughter traits with BW and size traits of Carneau pigeons.  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Item** & **BMT at Point A** & **BMT at Point B** & **BMW** & **Breast Width** & **BD** & **Live BW** & **Dressed Weight** \\ \hline BMT at Point A & 1 & & & & & & \\ BMW & 0.897 ** & 0.760 ** & 1 & & & & \\ Breast width & 0.512 ** & 0.486 ** & 0.590 ** & 1 & & & \\ BD & 0.388 ** & 0.497 ** & 0.471 ** & 0.291 * & 1 & & \\ Live BW & 0.366 ** & 0.420 ** & 0.533 ** & 0.545 ** & 0.275 ** & 1 & \\ Dressed & 0.388 ** & 0.567 ** & 0.634 ** & 0.579 ** & 0.469 ** & 0.906 ** & 1 \\ \hline \hline \end{tabular} Note: \({}^{*}p<0.05\); \({}^{**}p<0.01\).  
\end{table}
Table 3: Correlation analysis of slaughter traits with BW and size traits of Silver King pigeons.