Size, Shape and Prediction of Body Weight
Garut Sheep, Thin-Tailed Sheep and Fat-Tailed Sheep
Tirtosiwi, B. U., R. H. Mulyono and I. Inounu
Garut sheep, Thin-Tailed sheep and Fat-Tailed
sheep are breeds of sheep that have the potential to be bred in Indonesia. This
research is carried out to measure the size and shape of sheep by using
Principal Component Analysis (PCA) and to estimate the body of Garut sheep,
Thin-tailed sheep and Fat-tailed sheep by using Principal Component Regression
Analysis (PCRA). T2-Hotelling results showed that sheeps observed
were significantly different between breeds. This is due to differences in groups
of sheeps. Principal Component Analysis results showed that size of Garut sheep
more higher than Thin-Tailed sheep and Fat-Tailed sheep. The differences of shape
was indicates the differences genetics of sheep were observed. Slices of crowd chart
of Garut sheep and Thin-Tailed sheep higher than Garut sheep and Fat-Tailed sheep.
That was suitable with the origin of Garut sheep are cross by Merino sheep, Kaapstad
sheep and Thin-Tailed sheep so that Garut sheep and Thin-Tailed sheep have more
kindsip than Garut sheep and Fat-Tailed sheep. Principal Component Regression
Analysis results showed that the primary identity for body measurements of
Garut sheep, Thin-Tailed sheep and Fat-Tailed sheep were chest girth (X9) and it was the most
influential variable to predict body weight of Garut sheep, Thin-Tailed sheep
and Fat-Tailed sheep. That was showed by highest elasticity values of chest girth
(X9),
which each gained at 0,344; 0,420; 0.414 for rams of Garut sheep, Thin-Tailed
sheep and Fat-Tailed sheep and ewes at 0,446; 0,220; 0,739. Elasticity obtained
showed that each increase in one cm in chest girth (X9) in rams of Garut sheep,
Thin-Tailed sheep and Fat-Tailed sheep will each increase body weight 190,96 g;
187,58 g; 163,37 g; while ewes will increase the body weight of 169,47 g; 75,56
g; 254,93 g. Beside chest girth (X9), rump width (X7) and cannon circumference
(X10)
has considerable effect on body weight of Garut sheep, Thin-Tailed sheep and
Fat-Tailed sheep. That was indicates increase of one cm rump width (X7) and cannon
circumference (X10) rams of Garut sheep, Thin-Tailed sheep and
Fat-Tailed sheep will increase body weight 486,65 g; 425,99 g; 457,98 g and 1.364,87
g; 1.137,01 g; 679,58 g; while ewes will increase body weight amounted to 680,61
g; 298,67 g; 690,05 g and 934,55 g; 116,59 g; 586,51 g.
Keywords: Sheep, T2-Hotelling, Principal
Component Analysis, Principal Component Regression Analysis, Elasticity
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