Analysis of the Non-Genetic Factors Affecting the Growth of Segureño Sheep

Figures & data

Table 1. Determinative coefficient of the effect of each factor on weight of Segureña breed lambs, at three developmental stages, obtained with the univariate general linear model.

Factor	Developmental stage
	P1	P2	P3
Sex	1.4	2.8	5.2
Birth season	1.0	1.3	0.8
Herd	9.2	6.8	7.0
Year	2.2	3.1	1.8
Birth type	9.8	7.4	7.3

P1, early weaning between 16 and 35 days; P2, late weaning between 36 and 55 days; P3, final weight between 56 and 80 days. Values are expressed as percentage.

Table 2. Determinative coefficients of significant level of factors, interactions, covariates and models obtained with ANalysis Of VAriance for weight at the three developmental stages.

Source	Developmental stage
	P1	P2	P3
SEX	<0.001	<0.001	<0.001
B_SEASON	0.002	<0.001	<0.001
HERD	<0.001	<0.001	<0.001
YEAR	0.001	<0.001	-
B_TYPE	<0.001	<0.001	<0.001
AGE	<0.001	<0.001	<0.001
AGEDAM	<0.001	0.006	-
HERD * YEAR	<0.001	<0.001	<0.001
HERD * SEX	-	-	0.001
HERD * B_TYPE	<0.001	<0.001	<0.001
HERD * B_SEASON	<0.001	<0.001	<0.001
B_SEASON * YEAR	<0.001	-	0.003
YEAR * B_TYPE	<0.001	-	0.002
SEX * B_TYPE	0.012	-	0.015
HERD * YEAR * B_TYPE	<0.001	<0.001	<0.001
HERD * B_SEASON * YEAR	<0.001	0.003	<0.001
HERD * B_SEASON * B_TYPE	0.002	0.033	0.003
B_SEASON * YEAR * B_TYPE	-	-	0.015
HERD * B_SEASON * YEAR * SEX	-	-	0.031
HERD * B_SEASON * SEX * B_TYPE	0.031	0.016	-
B_SEASON * YEAR * SEX * B_TYPE	-	0.049	0.032
R^2reduced	0.489	0.456	0.443

P1, early weaning between 16 and 35 days; P2, late weaning between 36 and 55 days; P3, final weight between 56 and 80 days.

Table 3. Average weights and number of observations by birth type and sex at three developmental stages of Segureña breed lambs.

		P			Sex			P×Sex
							S		D		T
		S	D	T	M	F	M	F	M	F	M	F
P1	N	10042	9925	884	10464	10387	4909	5133	5089	4836	466	418
Average weight	9.50^a	8.04^b	7.89^c	9.12^a	8.68^b	9.82^d	9.19^a	8.55^e	8.22^c	8.00^c	7.77^c
P2	N	8415	8645	812	8925	8947	4152	4263	4375	4270	398	414
Average weight	14.51^a	13.18^b	12.37^c	14.21^a	13.33^b	15.06	13.97	13.53	12.81	12.71	12.05
P3	N	5754	7625	837	6910	7306	3018	2736	3856	3769	432	405
Average weight	20.12^a	18.56^b	17.12^c	19.89^a	18.36^b	19.30^a	21.03^c	17.85^b	19.28^d	16.48^d	17.81^e

P, birth type; S, single birth type; D, double birth type; T, triple or higher birth type; M, male; F, female; P1, early weaning between 16 and 35 days; P2, late weaning between 36 and 55 days; P3, final weight between 56 and 80 days; N, number of observations.

^a-eMeans with different letters within each factor or interaction are statistically different (P≤0.05).

Appendix Table 1. Basic statistical information of each factor that affects weight at the three developmental stages of Segureña breed lambs.

F^a ctor	P1				P2					P3
	N	MW, kg	SD	CV	N	MW, kg	SD	CV	N	MW, kg	SD	CV
Sex		^***				^***				^***
M^a le	10,464	9.12^a	1.89	20.72	8925	14.21^a	2.79	19.62	6910	19.89^a	3.5	17.7
Female	10,387	8.68^b	1.7	19.55	8947	13.33^b	2.42	18.13	7306	18.36^b	2.9	16
Birth season		^**				^***				^***
Spring	3540	9.05^a	1.8	19.92	2614	13.94^a	2.63	18.86	2220	18.96^a	3.3	17.2
Summer	10,186	8.73^b	1.77	20.24	9140	13.51^b	2.61	19.33	6821	18.87^a	3.3	17.6
Autumn	2919	9.03^a	1.96	21.74	2342	13.77^c	2.71	19.67	2144	19.23^b	3.4	17.6
Winter	4206	9.10^a	1.77	19.43	3776	14.26^d	2.62	18.4	3031	19.64^c	3.3	16.6
Herd		^***				^***				^***
AF	231	8.54^cdef	1.9	22.3	-	-	-	-	-	-	-	-
AN	234	9.26^klmnopq	1.88	20.3	269	14.21^hijkl	2.51	17.67	-	-	-	-
AT	2301	8.42^cde	1.6	18.97	1802	13.33^cde	2.51	18.84	1957	18.51^bcd	3.3	17.6
B	393	10.43^r	1.98	18.97	433	15.29^m	2.7	17.64	332	20.54^ik	2.8	13.8
CO	318	8.98^fghijklmno	1.73	19.28	297	14.09^ghijk	2.31	16.38	-	-	-	-
DR	556	9.21^jklmnopq	1.68	18.2	506	13.68^defghi	2.25	16.46	375	18.33^abc	2.8	15.4
FP	446	9.29^lmnopq	1.72	18.56	368	14.83^lm	2.75	18.56	315	19.73^ghi	3.2	16
FR	-	-	-	-	402	13.71^defghi	2.76	20.11	364	20.56^k	3.4	16.7
FV	496	9.14^ijklmnopq	1.97	21.55	322	14.32^ijkl	2.81	19.64	-	-	-	-
GH	661	9.01^ghijklmno	1.79	19.82	527	13.33^cde	2.45	18.41	554	17.66^a	3	17
GI	360	8.68^defghi	1.7	19.57	290	13.00^abc	2.65	20.4	233	18.87^bcdef	3.4	17.8
GO	280	8.98^fghijklmno	1.66	18.5	260	13.39^cdef	2.43	18.13	319	18.89^bcdef	3.3	17.4
GT	1340	9.04^hijklmnopq	1.71	18.86	1037	13.78^efghij	2.42	17.56	810	20.66^k	3.2	15.6
HC	189	8.83^efghijkl	1.53	17.33	-	-	-	-	218	18.19^ab	3.5	19.2
HM	-	-	-	-	149	14.10^ghijk	2.74	19.41	-	-	-	-
HR	553	8.20^abc	1.73	21.16	527	12.57^ab	2.78	22.08	448	17.62^a	3.1	17.8
HS	864	7.76^a	1.55	20.01	824	12.41^a	2.51	20.23	766	17.53^a	3.0	17
JF	889	8.70^defghij	1.63	18.8	699	13.55^cdefg	2.51	18.54	805	19.00^cdefg	3.2	16.8
JJ	343	8.80^efghijk	1.51	17.15	304	13.77^efghij	2.45	17.8	-	-	-	-
JR	430	9.10j^klmnop	1.76	19.37	372	14.39^jkl	2.57	17.84	-	-	-	-
LH	237	9.64^q	1.67	17.34	351	14.27^ijkl	2.69	18.83	-	-	-	-
LM	1438	9.06^hijklmnop	1.76	19.4	1077	13.83^efghij	2.61	18.88	1154	19.25^defgh	3.3	17
MM	390	8.99^fghijklmno	1.7	18.94	346	14.13^ghijk	2.52	17.81	-	-	-	-
NA	745	10.18^r	1.92	18.86	426	16.16^n	2.75	17.03	-	-	-	-
NI	260	9.39^opq	1.6	17.04	250	13.84^efghij	2.4	17.32	-	-	-	-
NN	344	9.01^ghijklmno	1.66	18.47	360	13.74^defghij	2.31	16.84	-	-	-	-
PV	372	8.58^cdefgh	1.69	19.65	370	13.29^cde	2.44	18.37	-	-	-	-
R	269	8.84^efghijkl	1.75	19.77	267	14.06^ghijk	2.62	18.61	-	-	-	-
RJ	200	9.10^jklmnop	1.89	20.8	-	-	-	-	-	-	-	-
RM	375	10.08^r	1.78	17.67	-	-	-	-	198	18.93^bcdef	3.0	16
RR	585	8.57^cdefg	1.94	22.58	794	13.81^efghij	2.78	20.1	959	19.61^fgh	3.7	19
SB	281	8.68^defghi	1.84	21.2	235	13.52^cdefg	2.6	19.21	207	19.76^ghij	3.2	16.4
SC	414	8.83^efghijkl	1.95	22.09	336	13.48^cdefg	2.7	20	440	18.74^bcde	3.2	16.8
TO	-	-	-	-	180	13.10^bcd	2.43	18.56	283	19.04^cdefg	3.3	17.1
VC	845	8.45^cde	1.63	19.25	870	13.37^cdef	2.42	18.13	866	19.00^cdefg	2.9	15.3
VJ	1004	9.07^hijklmnop	1.66	18.34	809	14.02^fghij	2.6	18.55	800	19.19^defgh	3.1	16.3
VS	194	7.83^a b	1.61	20.59	-	-	-	-	-	-	-	-
XP	204	9.34^mnopq	2.03	21.79	-	-	-	-	-	-	-	-
Z	921	9.37^nopq	1.78	18.95	860	14.69^klm	2.53	17.19	719	20.51^ijk	3.1	15
ZA	167	9.56^pq	1.78	18.59	187	13.78^efghij	2.35	17.05	403	19.96^hijk	3.3	16.5
ZF	722	8.26^bcd	1.61	19.45	766	13.56^cdefgh	2.61	19.26	691	19.33^efgh	3.3	17.1
Year		^***				^***				ns
1	1331	8.74^b	1.77	20.28	963	12.93^a	2.43	18.78	625	19.44	3.2	16.5
2	1118	9.08^e	1.71	18.78	972	14.20^d	2.5	17.62	785	20.36	3.5	17
3	1871	9.03^de	1.74	19.25	664	14.89^e	2.76	18.52	216	19.38	3.2	16.7
4	1037	9.00^bcde	1.84	20.46	813	13.95^cd	2.61	18.67	589	19.33	3.3	16.8
5	1911	8.89^bcd	1.72	19.35	1699	13.58^b	2.59	19.09	1310	18.46	3.3	17.7
6	2485	9.39^f	1.86	19.83	2275	14.12^cd	2.64	18.72	1991	19.42	3.2	16.2
7	2316	9.00^cde	1.78	19.74	2279	14.16^d	2.59	18.27	2176	19.05	3.3	17.5
8	1870	8.81^bc	1.74	19.81	1739	13.84b^c	2.5	18.07	1391	19.30	3.0	15.7
9	1440	8.83^b	1.84	20.87	1620	13.99^cd	2.76	19.74	1246	19.20	3.4	17.8
10	1596	9.00^bcde	1.76	19.57	1467	13.60^b	2.49	18.29	1741	18.93	3.4	17.9
11	3876	8.49^a	1.84	21.73	3381	13.14^a	2.67	20.32	2146	18.57	3.4	18.3
Birth type		^***				^***				^***
Simple	10,042	9.50^a	1.86	19.55	8415	14.51^a	2.65	18.29	5754	20.12^a	3.32	16.50
Double	9925	8.04^b	1.58	18.88	8645	13.18^b	2.47	18.71	7625	18.56^b	3.14	16.91
Triple or higher	884	7.89^c	1.38	17.49	812	12.37^c	2.24	18.09	837	17.12^c	2.88	16.84

P1, early weaning between 16 and 35 days; P2, late weaning between 36 and 55 days; P3, final weight between 56 and 80 days; N, number of observations; MW, mean weight; SD, standard deviation; CV, coefficient of variation (%).

^a-rMeans with different letters within each column and within each factor are statistically different.

**P≤0.05;

***P≤0.001; ns, not significant.