. 2023 Jan 10;9:1026528. doi: 10.3389/fvets.2022.1026528

Table 2.

Least-squares means ± S.D. for the studied traits.

Component	BWT, kg		WWT, kg		ADG, g		KR
Component	n	$\bar{x}$	n	$\bar{x}$	n	$\bar{x}$	n	$\bar{x} \pm S$
Model created		^**		^**		^**		^**
Sex		^**		^**		^**		^**
Male	18,684	2.70 ± 0.42	9,862	22.47 ± 4.0	9,862	166.59 ± 32.66	9,862	16.10 ± 1.76
Female	18,803	2.65 ± 0.40	16,319	18.90 ± 3.29	16,319	136.05 ± 28.10	16,319	14.97 ± 1.94
Birth type		^**		^**		^**		^**
Single	14,238	2.76 ± 0.43	11,574	21.66 ± 3.97	11,574	162.4 ± 32.51	11,574	16.18 ± 2.09
Twin	23,249	2.62 ± 0.38	14,607	19.11 ± 3.59	14,607	135.71 ± 29.01	14,607	14.78 ± 1.58
Herd		^**		^**		^**		^**
1	6,215	2.66 ± 0.41^bc	4,392	19.58 ± 4.14^e	4,392	143.12 ± 34.17^e	4,392	15.31 ± 2.02^c
2	6,292	2.68 ± 0.41^bc	4,260	19.99 ± 3.81^d	4,260	144.68 ± 32.14^d	4,260	15.24 ± 1.87^d
3	6,423	2.68 ± 0.42^b	4,554	20.67 ± 3.96^b	4,554	150.95 ± 33.02^b	4,554	15.52 ± 1.94^a
4	6,193	2.70 ± 0.41^a	4,469	20.83 ± 3.97^a	4,469	152.45 ± 33.67^a	4,469	15.56 ± 1.88^a
5	6,379	2.67 ± 0.41^bc	4,445	20.34 ± 3.83^c	4,445	148.70 ± 32.95^c	4,445	15.46 ± 1.95^b
6	5,985	2.66 ± 0.39^c	4,061	19.99 ± 3.97^d	4,061	144.89 ± 33.06^d	4,061	15.27 ± 2.05^cd
Year		^**		^**		^**		^**
Max	1,759	2.78 ± 0.40(2007)	1,151	22.97 ± 4.00(2,012)	1,151	171.94 ± 33.39(2012)	1,151	17.07 ± 2.44(2010)
Min	2,024	2.56 ± 0.37(2011)	1,324	15.41 ± 2.60(2,000)	1,324	108.74 ± 23.16(2,000)	1,324	13.92 ± 1.84(2000)
Month		^**		^**		^**		^**
1	87	2.67 ± 0.40^a	55	21.40 ± 3.78^a	55	99.10 ± 21.40^d	55	9.88 ± 1.00^e
2	168	2.69 ± 0.41^a	113	20.89 ± 4.33^ab	113	119.17 ± 30.11^c	113	12.05 ± 1.37^d
3	29,179	2.68 ± 0.42^a	20,920	20.76 ± 3.89^b	20,920	146.80 ± 32.41^b	20,920	14.98 ± 1.41^c
4	7,174	2.67 ± 0.38^a	4538	18.51 ± 3.38^c	4,538	151.34 ± 35.41^a	4,538	16.83 ± 2.17^b
5	879	2.66 ± 0.36^a	555	14.68 ± 3.22^d	555	155.15 ± 42.78^a	555	20.55 ± 3.35^a
Dam age		^**		^**		^**		^**
2	6,741	2.65 ± 0.41^c	4,413	19.73 ± 3.86^d	4,413	147.17 ± 32.54^bc	4,413	15.68 ± 2.04^a
3	7,408	2.67 ± 0.41^ab	5,181	20.16 ± 4.07^c	5,181	147.12 ± 33.99^bc	5,181	15.40 ± 1.96^b
4	7,244	2.69 ± 0.41^ab	5,170	20.37 ± 4.04^b	5,170	147.90 ± 34.15^ab	5,170	15.36 ± 1.98^bc
5	6,633	2.68 ± 0.40^ab	4,796	20.53 ± 3.86^a	4,796	148.37 ± 32.67^a	4,796	15.31 ± 1.89^cd
6	5,705	2.69 ± 0.41^a	4,104	20.25 ± 3.98^c	4,104	146.60 ± 33.58^c	4,104	15.30 ± 1.98^d
7 or more	3,756	2.67 ± 0.41^b	2,517	20.49 ± 3.94^a	2,517	148.34 ± 32.75^a	2,517	15.33 ± 1.75^cd
Sex^*type		ns		^**		^**		ns
Herd^year^month		^**		^**		^**		^**

BWT, birth weight; ADG, average daily gain from birth to weaning; WWT, weaning weight; KR, Kleiber ratio (ADG/WWT ^0.75) from birth to weaning; ns: non-significant (p > 0.05). The means with different letters in each sub-class within a column differ significantly from another. ^*p < 0.05 and

^**

p < 0.01.