Effect of breed (hair and wool), weight and sex on carcass quality of light lambs under intensive management

Figures & data

Figure 1. Discriminate functions and centroids for carcass quality of breed × weight interaction.

Table 1. Lambda of Wilks and the signification of the different functions.

Function	Lambda of Wilks	Chi-Cuadrado	Variance	Significance
1	0.010	310.847	90.6	0.001
2	0.241	95.956	8.0	0.001
3	0.736	20.654	1.4	0.037

Table 2. Combined intra-group correlations between discriminate variables and canonical discriminate functions.

	Function
Variables	1	2	3
Muscle percentage	−0.034	−0.578	0.031
Intermuscular fat percentage	−0.026	0.556	0.087
Total fat percentage	0.032	0.524	0.130
Carcass conformation	0.115	0.352	0.106
Fat depth	0.156	0.350	−0.183
Bone percentage	0.010	−0.213	0.127
Second category	−0.022	−0.183	−0.084
Subcutaneous fat percentage	0.060	0.069	0.065
Carcass compactness index	0.382	−0.034	0.599
Carcass yield	−0.107	0.031	0.598
Leg compactness index	0.050	0.032	−0.333
Remainders percentage	−0.054	−0.232	0.243
First category	0.018	0.077	0.194
Third category	0.001	0.033	−0.116

Bold represents as: canonical correlation coeffient of most important variables. Correlation coeficient >0.3 in function 1 and correlation coeficiente >0.5 in function 2.

Table 3. Means and effect of the functions 1 and 2.

	Breed
	Canaria		Canaria Hair		Effect
Function	16 kg	25 kg	16 kg	25 kg	Breed	Weight	Breed × weight
1	−4.242	4.893	−5.004	4.559	0.019	0.001	ns
2	1.182^a	1.455^a	−1.091^b	−1.777^b	0.001	ns	0.039

Note: Different letters are significant at P ≤ 0.05.

ns, not significant.

Table 4. Carcass weights and yield (means) in CB and CHB.

	Breed
	Canaria		Canaria Hair		Sex			Effect
Characteristics	16 kg	25 kg	16 kg	25 kg	Male	Female	SEM	Breed	Weight	Sex	Breed × weight	Breed × sex
Farm weight (kg)	15.85	24.78	15.76	25.04	20.35	20.02	0.5	ns	***	ns	ns	ns
Slaughterhouse live weight (kg)	15.36	24.03	15.40	24.44	19.78	19.50	0.5	ns	***	ns	ns	ns
Slaughter weight (kg)	14.62	22.41	14.75	23.00	18.62	18.46	0.4	*	***	ns	ns	ns
Total weight loss (%)	7.89	9.74	6.50	8.21	8.41	7.71	0.1	***	***	ns	ns	ns
Hot carcass weight (kg)	7.40^a	10.40^b	7.18^a	10.97^c	8.93	8.91	0.2	ns	***	ns	**	ns
Cold carcass weight (kg)	7.24^a	10.23^b	6.96^a	10.77^c	8.73	8.73	0.2	ns	***	ns	**	ns
Drip loss (%)	2.21	2.15	2.99	1.78	2.52	2.07	0.2	ns	ns	ns	ns	ns
Carcass yield (%)	49.49^b	45.67^a	47.22^ab	46.83^a	47.13	47.55	0.3	ns	**	ns	**	ns

Note: Means in the same row showing different letters are significantly different (P ≤ 0.05).

SEM, standard error of mean; ns, not significant (P > 0.05).

*P < 0.05; **P < 0.01; ***P < 0.001.

Table 5. Carcass traits (means and SEM) of CB and CHB.

	Breed
	Canaria		Canaria Hair		Sex			Effect
Characteristics	16 kg	25 kg	16 kg	25 kg	Male	Female	SEM	Breed	Weight	Sex	Breed × weight	Breed × sex
Leg length (F), cm	26.28^a	28.25^b	25.94^a	30.07^c	27.57	27.55	0.2	**	***	ns	***	ns
Rump width (G), cm	12.57	14.50	12.64	14.86	13.56	13.64	0.1	ns	***	ns	ns	ns
Half carcass length (L), cm	44.83	52.12	46.75	53.29	48.84	49.39	0.4	***	***	ns	ns	ns
Carcass length (K), cm	45.18^a	53.08^c	45.59^a	52.13^b	48.65	49.10	0.4	ns	***	ns	*	ns
Rump perimeter (B), cm	43.88^a	49.83^b	43.62^a	51.45^c	47.04	47.07	0.4	*	***	ns	**	ns
Maximum width ribs (Wr), cm	14.40	17.50	14.18	17.60	15.73	16.00	0.2	ns	***	ns	ns	ns
CCW/L, kg cm^−1	0.16^b	0.20^c	0.15^a	0.20^c	0.17	0.17	0.0	ns	***	ns	**	ns
G/F	0.48	0.51	0.48	0.49	0.49	0.49	0.0	ns	*	ns	ns	ns
Conformation (1–15 points)	7.00	9.70	6.10	10.63	8.46	8.10	0.3	ns	***	ns	ns	ns
EUROP	O+	R+	O+	U–	R	R	–	–	–	–	–	–
Fatness (1–12 points)	7.45	8.90	6.00	7.26	7.68	7.16	0.1	***	***	ns	ns	ns
Fat depth (mm)	3.02	4.83	2.31	3.47	3.32	3.46	0.1	***	***	ns	ns	ns

Note: Means in the same row showing different letters are significantly different (P ≤ 0.05).

SEM, standard error of mean; CCW, cold carcass weight; ns, not significant (P > 0.05).

EUROP = scale 1–15 points: 1 = P–, 2 = P (poor), 3 = P+, 4 = O–, 5 = O (normal), 6 = O+, 7 = R–, 8 = R (good), 9 = R+, 10 = U–, 11 = U (very good), 12 = U+, 13 = E–, 14 = E (excelent), 15 = E+.

*P < 0.05; **P < 0.01; ***P < 0.001.

Table 6. Carcass composition (means) of CB and CHB.

	Breed
	Canaria		Canaria Hair		Sex			Effect
Characteristics	16 kg	25 kg	16 kg	25 kg	Male	Female	SEM	Breed	Weigh	Sex	Breed × weight	Breed × sex
Category (%)
1^a(leg + loin + anterior ribs)	60.72	60.78	60.20	60.50	60.16	60.95	0.2	ns	ns	*	ns	ns
2^a(shoulder)	17.27	17.05	18.04	17.57	17.72	17.25	0.1	*	ns	ns	ns	ns
3^a(breast + neck + tail)	20.14	20.29	19.87	20.13	20.44	19.76	0.2	ns	ns	ns	ns	ns
Components (%)
Muscle (M)	48.95	49.03	53.85	55.34	52.33	51.06	0.5	***	ns	ns	ns	*
Total fat (TF)	24.66	25.57	17.61	19.16	20.67	23.03	0.5	***	ns	***	ns	ns
Subcutaneous fat (SF)	10.79	9.71	7.03	7.23	8.68	8.79	0.3	***	ns	ns	ns	ns
Intermuscular fat (IF)	13.87	15.86	10.57	11.92	11.98	14.24	0.3	***	**	***	ns	ns
Bone (B)	21.69	20.27	22.55	20.29	21.75	20.66	0.1	ns	***	***	ns	ns
Remainders	1.94	1.51	2.14	1.78	1.91	1.78	0.0	ns	**	ns	ns	ns
M/TF	2.06	1.95	3.14	2.95	2.66	2.36	0.0	***	ns	*	ns	ns
M/B	2.26	2.42	2.39	2.74	2.42	2.48	0.0	***	***	ns	ns	ns
SF/IF	0.83	0.64	0.68	0.63	0.77	0.63	0.0	ns	*	*	ns	ns

SEM = standard error of mean; ns = not significant (P > 0.05).

*P < 0.05; **P < 0.01; ***P < 0.001.