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Statistical modelling
No parameter estimate is shown for the pure breed DD,
which is used as a reference level against which the estimate for each of the
other genotypes is compared. The least squares 'predicted' means, however, are
calculated for all four genotypes. They indicate that the purebred RR lambs had
the lowest mean weaning weight of 10.512 ± 0.193 kg, whilst the purebred DD
lambs had the highest mean weaning weight of 11.552 ± 0.159 kg.
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Response variate: WEANWT
Fitted terms: Constant + YEAR + SEX + AGEWEAN + DL
+ DQ + GENOTYPE
*** Estimates of parameters ***
|
|
estimate |
s.e. |
t(687) |
|
Constant |
0.25 |
1.07 |
0.23 |
|
YEAR 92 |
-1.565 |
0.293 |
-5.34 |
|
YEAR 93 |
-1.099 |
0.276 |
-3.99 |
|
YEAR 94 |
-2.820 |
0.359 |
-7.85 |
|
YEAR 95 |
-3.215 |
0.346 |
-9.30 |
|
YEAR 96 |
-2.342 |
0.391 |
-5.99 |
|
SEX M |
0.476 |
0.170 |
2.81 |
|
AGEWEAN |
0.07026 |
0.00886 |
7.93 |
|
DL |
2.725 |
0.315 |
8.65 |
|
DQ |
-0.269 |
0.034 |
-7.90 |
|
GENOTYPE RD |
-0.389 |
0.220 |
-1.77 |
|
GENOTYPE RR |
-1.040 |
0.271 |
-3.84 |
|
GENOTYPE DR |
-0.511 |
0.304 |
-1.68 |
*** Accumulated analysis of variance ***
Change |
d.f. |
s.s. |
m.s. |
v.r. |
| +YEAR |
5 |
1208.149 |
241.630 |
48.92 |
+SEX |
1 |
55.983 |
55.983 |
11.34 |
+AGEWEAN |
1 |
344.206 |
344.206 |
69.69 |
| +DL |
1 |
151.513 |
151.513 |
30.68 |
+DQ |
1 |
275.795 |
275.795 |
55.84 |
| +GENOTYPE |
3 |
75.857 |
25.286 |
5.12 |
Residual |
687 |
3392.947 |
4.939 |
|
Total |
699 |
5504.450 |
7.875 |
|
GENOTYPE |
Prediction |
s.e. |
DD |
11.552 |
0.159 |
DR |
11.041 |
0.240 |
RD |
11.163 |
0.176 |
|
RR |
10.512 |
0.193 |
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