Estimation of genetic parameters of body size and body weight at different growth stages of Luzhong mutton sheep

doi:10.3969/j.issn.1004-1524.20230138

Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (1): 48-57.DOI: 10.3969/j.issn.1004-1524.20230138

• Animal Science • Previous Articles Next Articles

Estimation of genetic parameters of body size and body weight at different growth stages of Luzhong mutton sheep

YANG Cunming¹^,²(), LIU Jing¹^,², ZHANG Menghua¹, ZHANG Xiaoxue¹, LIU Guifen², HE Junmin³, MAO Jingyi¹, LI Xue¹, TANG Li¹, ZHANG Wenjing¹, PAN Linxiang⁴, TIAN Kechuan²^,^*(), HUANG Xixia¹^,^*()

1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China
2. Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan 250100, China
3. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
4. Laiwu Yingtai Organic Agricultural Technology Development Co., Ltd., Jinan 271100, China

Received:2023-02-09 Online:2024-01-25 Published:2024-02-18

Abstract

Abstract:

The objective of this study is to estimate the genetic parameters of body size and body weight of Luzhong mutton sheep at different growth stages, and to analyze the genetic rules between various traits, in order to provide a theoretical basis for the breeding planning of Luzhong mutton sheep. A total of 15 040 Luzhong mutton sheep body size and body weight data were collected from 2015 to 2019, and the body weight, body height, body length, chest circumference, chest width, chest depth, and cannon circumference traits of firstborn, 3 months, 6 months, one year and adult stage were taken as the research objects, and AI-REML combined with EM algorithm in DMU software was used to cooperate with animal models, taking birth year, birth season and sex as fixed effects, and additive effect and maternal effect as random effects, to estimate the heritability and genetic correlation of each trait. The heritability of Luzhong meat sheep weight from fristborn to adult was 0.18-0.51, the heritability of body height was 0.15-0.60, the heritability of body length was 0.09-0.42, the heritability of chest circumference was 0.11-0.43, the heritability of chest width was 0.05-0.39, the heritability of chest depth was 0.06-0.21, the heritability of cannon circumference was 0.11-0.59, and the maternal heritability of the firstborn to 6 months was 0.15-0.26, the genetic correlation coefficient between traits at different stages was -0.52-0.98, and the phenotypic correlation was -0.05-0.95. The genetic correlation coefficient of body weight between different growth stages was -0.10-0.87, and the phenotype correlation was 0.01-0.91. The maternal genetic effect had a high influence on the early growth traits of Luzhong meat sheep, and with the gradual weakening of the maternal genetic effect of growth, the heritability of body size and body weight of one year old was the highest in this study, and there was a genetic correlation between body size and body weight at different growth stages. The genetic correlation coefficient between 6 months old and one year old was the highest among the growth stages.

Key words: Luzhong mutton sheep, different growth stages, body size, body weight, maternal genetic effects, genetic parameters

CLC Number:

S826

YANG Cunming, LIU Jing, ZHANG Menghua, ZHANG Xiaoxue, LIU Guifen, HE Junmin, MAO Jingyi, LI Xue, TANG Li, ZHANG Wenjing, PAN Linxiang, TIAN Kechuan, HUANG Xixia. Estimation of genetic parameters of body size and body weight at different growth stages of Luzhong mutton sheep[J]. Acta Agriculturae Zhejiangensis, 2024, 36(1): 48-57.

Figures/Tables 5

Table 1 Descriptive statistics of body size and body weight at different growth stages of Luzhong mutton sheep

性状 Trait	生长阶段 Growth stage	数目 Number	平均值 Mean	标准差 SD	变异系数 CV/%
体重Body weight/kg	初生Firstborn	6 791	4.02	0.85	21.14
	3月龄3-month-old	2 924	27.39	5.47	19.97
	6月龄6-month-old	2 429	41.23	5.59	13.56
	周岁One-year-old	1 541	66.39	11.30	17.02
	成年Adult	752	79.33	14.22	17.93
体高Body height/cm	初生Firstborn	6 979	33.54	2.75	8.20
	3月龄3-month-old	2 957	50.13	5.49	10.95
	6月龄6-month-old	2 522	59.33	5.74	9.67
	周岁One-year-old	1 549	66.87	4.73	7.07
	成年Adult	923	71.42	6.38	8.93
体长Body length/cm	初生Firstborn	6 972	30.02	2.94	9.79
	3月龄3-month-old	2 894	50.67	6.09	12.02
	6月龄6-month-old	2 531	61.98	7.45	12.02
	周岁One-year-old	1 544	68.18	8.29	12.16
	成年Adult	928	73.07	9.59	13.12
胸围Chest cirumference/cm	初生Firstborn	6 951	35.68	2.98	8.35
	3月龄3-month-old	2 910	62.60	5.00	7.99
	6月龄6-month-old	2 488	78.73	7.81	9.92
	周岁One-year-old	1 508	93.82	5.24	5.59
	成年Adult	871	100.62	7.65	7.60
胸宽Chest width/cm	初生Firstborn	6 565	9.35	1.16	12.41
	3月龄3-month-old	2 957	18.03	2.16	11.98
	6月龄6-month-old	2 475	22.56	2.08	9.22
	周岁One-year-old	1 538	25.68	1.93	7.52
	成年Adult	908	28.20	3.31	11.74
胸深Chest depth/cm	初生Firstborn	6 943	12.50	1.28	10.24
	3月龄3-month-old	2 923	23.62	1.93	8.17
	6月龄6-month-old	2 470	27.72	1.67	6.02
	周岁One-year-old	1 529	30.76	2.13	6.92
	成年Adult	918	33.85	3.99	11.79
管围Cannon cirumference/cm	初生Firstborn	6 630	5.75	0.54	9.39
	3月龄3-month-old	2 908	6.71	0.55	8.20
	6月龄6-month-old	2 464	7.81	0.75	9.60
	周岁One-year-old	1 539	8.88	0.62	6.98
	成年Adult	919	10.29	0.94	9.14

Table 2 Influencing factors of body size and body weight at different growth stages of Luzhong mutton sheep

性状 Trait	生长阶段 Growth stage	出生年份 Birth year	出生季节 Birth season	性别 Sex
体重Body weight	初生Firstborn	11.06^**	2.73^**	163.43^**
	3月龄3-month-old	5 749.94^**	653.22^**	1 935.10^**
	6月龄6-month-old	2 686.66^**	1 584.85^**	357.17^**
	周岁One-year-old	1 795.33^**	1 763.55^**	12 9961.54^**
	成年Adult	637.26^**	24.16	95 256.70^**
体高Body height	初生Firstborn	241.65^**	15.18	3 525.09^**
	3月龄3-month-old	260.77^**	423.29^**	8420.50^**
	6月龄6-month-old	834.22^**	915.98^**	4 422.99^**
	周岁One-year-old	627.66^**	547.05^**	3 783.93^**
	成年Adult	1 118.77^**	39.64	5 342.08^**
体长Body length	初生Firstborn	2 179.34^**	81.24^**	240.77^**
	3月龄3-month-old	480.36^**	254.39^**	3 3711.06^**
	6月龄6-month-old	1 004.75^**	45.21	48 499.25^**
	周岁One-year-old	40.65	540.99^**	66 036.12^**
	成年Adult	405.11^**	167.84^**	43 121.04^**
胸围Chest cirumference	初生Firstborn	109.02^**	27.77^*	2 508.33^**
	3月龄3-month-old	159.88^**	114.14^**	18 779.52^**
	6月龄6-month-old	2 938.28^**	1 838.71^**	27 386.37^**
	周岁One-year-old	461.51^**	276.54^**	24 675.69^**
	成年Adult	842.54^**	58.91	20 452.58^**
胸宽Chest width	初生Firstborn	27.61^**	9.83^**	522.59^**
	3月龄3-month-old	750.69^**	120.76^**	786.68^**
	6月龄6-month-old	172.56^**	46.40^**	304.58^**
	周岁One-year-old	137.39^**	63.56^**	2 011.36^**
	成年Adult	201.86^**	12.34	3 982.34^**
胸深Chest depth	初生Firstborn	81.81^**	16.45^**	558.59^**
	3月龄3-month-old	362.20^**	176.67^**	203.30^**
	6月龄6-month-old	129.45^**	13.33^**	427.35^**
	周岁One-year-old	7.99^**	1.25	4 035.62^**
	成年Adult	165.96^**	14.39	7 277.47^**
管围Cannon cirumference	初生Firstborn	92.84^**	0.80^*	42.35^**
	3月龄3-month-old	18.83^**	7.34^**	169.49^**
	6月龄6-month-old	5.32^**	3.95^**	577.17^**
	周岁One-year-old	0.73^**	0.38^*	391.05^**
	成年Adult	47.98^**	2.29^*	56.72^**

Table 2 Influencing factors of body size and body weight at different growth stages of Luzhong mutton sheep

性状 Trait	生长阶段 Growth stage	出生年份 Birth year	出生季节 Birth season	性别 Sex
体重Body weight	初生Firstborn	11.06^**	2.73^**	163.43^**
	3月龄3-month-old	5 749.94^**	653.22^**	1 935.10^**
	6月龄6-month-old	2 686.66^**	1 584.85^**	357.17^**
	周岁One-year-old	1 795.33^**	1 763.55^**	12 9961.54^**
	成年Adult	637.26^**	24.16	95 256.70^**
体高Body height	初生Firstborn	241.65^**	15.18	3 525.09^**
	3月龄3-month-old	260.77^**	423.29^**	8420.50^**
	6月龄6-month-old	834.22^**	915.98^**	4 422.99^**
	周岁One-year-old	627.66^**	547.05^**	3 783.93^**
	成年Adult	1 118.77^**	39.64	5 342.08^**
体长Body length	初生Firstborn	2 179.34^**	81.24^**	240.77^**
	3月龄3-month-old	480.36^**	254.39^**	3 3711.06^**
	6月龄6-month-old	1 004.75^**	45.21	48 499.25^**
	周岁One-year-old	40.65	540.99^**	66 036.12^**
	成年Adult	405.11^**	167.84^**	43 121.04^**
胸围Chest cirumference	初生Firstborn	109.02^**	27.77^*	2 508.33^**
	3月龄3-month-old	159.88^**	114.14^**	18 779.52^**
	6月龄6-month-old	2 938.28^**	1 838.71^**	27 386.37^**
	周岁One-year-old	461.51^**	276.54^**	24 675.69^**
	成年Adult	842.54^**	58.91	20 452.58^**
胸宽Chest width	初生Firstborn	27.61^**	9.83^**	522.59^**
	3月龄3-month-old	750.69^**	120.76^**	786.68^**
	6月龄6-month-old	172.56^**	46.40^**	304.58^**
	周岁One-year-old	137.39^**	63.56^**	2 011.36^**
	成年Adult	201.86^**	12.34	3 982.34^**
胸深Chest depth	初生Firstborn	81.81^**	16.45^**	558.59^**
	3月龄3-month-old	362.20^**	176.67^**	203.30^**
	6月龄6-month-old	129.45^**	13.33^**	427.35^**
	周岁One-year-old	7.99^**	1.25	4 035.62^**
	成年Adult	165.96^**	14.39	7 277.47^**
管围Cannon cirumference	初生Firstborn	92.84^**	0.80^*	42.35^**
	3月龄3-month-old	18.83^**	7.34^**	169.49^**
	6月龄6-month-old	5.32^**	3.95^**	577.17^**
	周岁One-year-old	0.73^**	0.38^*	391.05^**
	成年Adult	47.98^**	2.29^*	56.72^**

Table 3 Variance components and heritability estimates of growth traits of Luzhong mutton sheep

性状Trait	生长阶段Growth stage	$σ a 2$	$σ m 2$	$σ e 2$	$σ p 2$	h²±SE	$h m 2$ ±SE
体重Body weight	初生Firstborn	0.14	0.20	0.43	0.77	0.18±0.02	0.26±0.04
	3月龄3-month-old	8.54	4.37	8.03	20.94	0.37±0.02	0.19±0.04
	6月龄6-month-old	12.73	4.18	8.50	25.41	0.45±0.02	0.15±0.03
	周岁One-year-old	15.08	—	14.33	29.41	0.51±0.05	—
	成年Adult	20.86	—	44.09	64.95	0.32±0.09	—
体高Body height	初生Firstborn	1.12	1.18	5.03	7.33	0.15±0.02	0.16±0.03
	3月龄3-month-old	12.68	7.29	15.21	35.18	0.25±0.03	0.14±0.05
	6月龄6-month-old	16.39	6.17	14.82	37.38	0.32±0.03	0.12±0.05
	周岁One-year-old	10.48	—	6.93	17.41	0.60±0.04	—
	成年Adult	16.71	—	13.27	29.98	0.56±0.07	—
体长Body length	初生Firstborn	1.38	1.73	4.96	3.11	0.17±0.02	0.21±0.03
	3月龄3-month-old	2.78	1.27	17.76	21.81	0.10±0.04	0.04±0.06
	6月龄6-month-old	4.80	3.70	25.67	34.17	0.09±0.03	0.07±0.06
	周岁One-year-old	8.72	—	11.93	20.65	0.42±0.05	—
	成年Adult	11.66	—	26.78	38.44	0.30±0.08	—
胸围Chest cirumference	初生Firstborn	1.23	2.92	5.74	8.89	0.11±0.02	0.29±0.03
	3月龄3-month-old	3.00	1.54	13.97	18.51	0.13±0.03	0.07±0.06
	6月龄6-month-old	24.44	10.21	17.93	52.58	0.31±0.02	0.13±0.04
	周岁One-year-old	2.35	—	6.09	8.44	0.28±0.05	—
	成年Adult	13.39	—	17.99	31.38	0.43±0.08	—
胸宽Chest width	初生Firstborn	0.07	0.39	0.88	1.34	0.05±0.02	0.29±0.03
	3月龄3-month-old	0.78	0.95	2.12	3.85	0.19±0.04	0.24±0.06
	6月龄6-month-old	0.59	0.78	2.91	4.28	0.13±0.03	0.17±0.05
	周岁One-year-old	0.62	—	1.11	1.73	0.36±0.05	—
	成年Adult	2.22	—	3.49	5.71	0.39±0.07	—
胸深Chest depth	初生Firstborn	0.20	0.26	1.13	1.59	0.12±0.02	0.16±0.03
	3月龄3-month-old	0.68	0.45	2.06	3.19	0.21±0.04	0.14±0.06
	6月龄6-month-old	0.40	0.43	1.75	2.58	0.15±0.03	0.16±0.07
	周岁One-year-old	0.11	—	1.63	1.74	0.06±0.04	—
	成年Adult	1.48	—	5.94	7.42	0.20±0.08	—
管围Cannon cirumference	初生Firstborn	0.06	0.07	0.12	0.25	0.23±0.02	0.28±0.03
	3月龄3-month-old	0.02	0.01	0.15	0.18	0.11±0.04	0.02±0.06
	6月龄6-month-old	0.09	0.07	0.18	0.34	0.26±0.06	0.20±0.08
	周岁One-year-old	0.01	—	0.10	0.11	0.12±0.05	—
	成年Adult	0.31	—	0.22	0.53	0.59±0.05	—

Table 3 Variance components and heritability estimates of growth traits of Luzhong mutton sheep

性状Trait	生长阶段Growth stage	$σ a 2$	$σ m 2$	$σ e 2$	$σ p 2$	h²±SE	$h m 2$ ±SE
体重Body weight	初生Firstborn	0.14	0.20	0.43	0.77	0.18±0.02	0.26±0.04
	3月龄3-month-old	8.54	4.37	8.03	20.94	0.37±0.02	0.19±0.04
	6月龄6-month-old	12.73	4.18	8.50	25.41	0.45±0.02	0.15±0.03
	周岁One-year-old	15.08	—	14.33	29.41	0.51±0.05	—
	成年Adult	20.86	—	44.09	64.95	0.32±0.09	—
体高Body height	初生Firstborn	1.12	1.18	5.03	7.33	0.15±0.02	0.16±0.03
	3月龄3-month-old	12.68	7.29	15.21	35.18	0.25±0.03	0.14±0.05
	6月龄6-month-old	16.39	6.17	14.82	37.38	0.32±0.03	0.12±0.05
	周岁One-year-old	10.48	—	6.93	17.41	0.60±0.04	—
	成年Adult	16.71	—	13.27	29.98	0.56±0.07	—
体长Body length	初生Firstborn	1.38	1.73	4.96	3.11	0.17±0.02	0.21±0.03
	3月龄3-month-old	2.78	1.27	17.76	21.81	0.10±0.04	0.04±0.06
	6月龄6-month-old	4.80	3.70	25.67	34.17	0.09±0.03	0.07±0.06
	周岁One-year-old	8.72	—	11.93	20.65	0.42±0.05	—
	成年Adult	11.66	—	26.78	38.44	0.30±0.08	—
胸围Chest cirumference	初生Firstborn	1.23	2.92	5.74	8.89	0.11±0.02	0.29±0.03
	3月龄3-month-old	3.00	1.54	13.97	18.51	0.13±0.03	0.07±0.06
	6月龄6-month-old	24.44	10.21	17.93	52.58	0.31±0.02	0.13±0.04
	周岁One-year-old	2.35	—	6.09	8.44	0.28±0.05	—
	成年Adult	13.39	—	17.99	31.38	0.43±0.08	—
胸宽Chest width	初生Firstborn	0.07	0.39	0.88	1.34	0.05±0.02	0.29±0.03
	3月龄3-month-old	0.78	0.95	2.12	3.85	0.19±0.04	0.24±0.06
	6月龄6-month-old	0.59	0.78	2.91	4.28	0.13±0.03	0.17±0.05
	周岁One-year-old	0.62	—	1.11	1.73	0.36±0.05	—
	成年Adult	2.22	—	3.49	5.71	0.39±0.07	—
胸深Chest depth	初生Firstborn	0.20	0.26	1.13	1.59	0.12±0.02	0.16±0.03
	3月龄3-month-old	0.68	0.45	2.06	3.19	0.21±0.04	0.14±0.06
	6月龄6-month-old	0.40	0.43	1.75	2.58	0.15±0.03	0.16±0.07
	周岁One-year-old	0.11	—	1.63	1.74	0.06±0.04	—
	成年Adult	1.48	—	5.94	7.42	0.20±0.08	—
管围Cannon cirumference	初生Firstborn	0.06	0.07	0.12	0.25	0.23±0.02	0.28±0.03
	3月龄3-month-old	0.02	0.01	0.15	0.18	0.11±0.04	0.02±0.06
	6月龄6-month-old	0.09	0.07	0.18	0.34	0.26±0.06	0.20±0.08
	周岁One-year-old	0.01	—	0.10	0.11	0.12±0.05	—
	成年Adult	0.31	—	0.22	0.53	0.59±0.05	—

Table 4 Genetic correlation coefficient and phenotypic correlation coefficient of growth traits of Luzhong mutton sheep

性状 Trait	生长阶段 Growth stage	体重 Body weight	体高 Body height	体长 Body length	胸围 Chest cirumference	胸宽 Chest width	胸深 Chest depth	管围 Cannon cirumference
体重	初生Firstborn		0.76±0.03	0.71±0.03	0.87±0.02	0.62±0.03	0.77±0.03	0.72±0.02
Body weight	3月龄3-month-old		0.50±0.03	0.20±0.07	0.68±0.05	0.57±0.04	0.73±0.05	0.01±0.09
	6月龄6-month-old		0.74±0.03	0.33±0.07	0.89±0.02	0.74±0.08	0.63±0.06	0.54±0.04
	周岁One-year-old		0.38±0.06	0.39±0.07	0.93±0.03	0.77±0.05	0.77±0.13	0.60±0.10
	成年Adult		0.56±0.11	0.20±0.19	0.98±0.02	0.97±0.02	0.86±0.09	0.64±0.07
体高	初生Firstborn	0.68^**		0.46±0.05	0.62±0.03	0.54±0.04	0.72±0.03	0.53±0.04
Body height	3月龄3-month-old	0.47^**		-0.30±0.08	0.87±0.04	0.80±0.04	0.66±0.06	0.52±0.08
	6月龄6-month-old	0.65^**		0.13±0.09	0.84±0.03	0.78±0.07	0.75±0.06	0.63±0.06
	周岁One-year-old	0.52^**		-0.52±0.07	0.55±0.07	0.64±0.05	0.50±0.17	0.79±0.07
	成年Adult	0.51^**		-0.49±0.15	0.57±0.08	0.61±0.08	0.55±0.12	0.71±0.04
体长	初生Firstborn	0.46^**	0.29^**		0.78±0.03	0.34±0.02	0.56±0.04	0.56±0.03
Body length	3月龄3-month-old	0.14^**	0.03		0.36±0.10	0.16±0.09	0.05±0.10	0.20±0.12
	6月龄6-month-old	0.18^**	0.10^**		0.54±0.07	0.30±0.12	0.26±0.11	0.78±0.05
	周岁One-year-old	0.80^**	0.07^**		0.20±0.11	-0.23±0.11	-0.01±0.23	0.14±0.17
	成年Adult	0.80^**	0.22^**		0.20±0.18	0.31±0.16	0.20±0.22	0.01±0.14
胸围	初生Firstborn	0.78^**	0.65^**	0.60^**		0.68±0.03	0.73±0.03	0.69±0.03
Chest	3月龄3-month-old	0.50^**	0.67^**	0.56^**		0.83±0.04	0.81±0.06	0.44±0.10
cirumference	6月龄6-month-old	0.72^**	0.77^**	0.54^**		0.79±0.06	0.75±0.05	0.82±0.03
	周岁One-year-old	0.93^**	0.58^**	0.73^**		0.83±0.05	0.64±0.18	0.52±0.13
	成年Adult	0.94^**	0.71^**	0.73^**		0.98±0.02	0.88±0.06	0.64±0.06
胸宽	初生Firstborn	0.56^**	0.56^**	0.34^**	0.65^**		0.68±0.03	0.39±0.04
Chest width	3月龄3-month-old	0.56^**	0.62^**	0.23^**	0.61^**		0.93±0.03	0.43±0.09
	6月龄6-month-old	0.28^**	0.45^**	0.30^**	0.46^**		0.91±0.04	0.54±0.09
	周岁One-year-old	0.84^**	0.68^**	0.50^**	0.86^**		0.41±0.19	0.28±0.16
	成年Adult	0.92^**	0.70^**	0.74^**	0.95^**		0.93±0.04	0.76±0.05
胸深	初生Firstborn	0.67^**	0.69^**	0.35^**	0.72^**	0.62^**		0.57±0.04
Chest depth	3月龄3-month-old	0.60^**	0.50^**	0.16^**	0.49^**	0.76^**		0.37±0.10
	6月龄6-month-old	0.29^**	0.47^**	0.37^**	0.54^**	0.72^**		0.53±0.08
	周岁One-year-old	0.82^**	0.43^**	0.74^**	0.85^**	0.76^**		0.71±0.23
	成年Adult	0.90^**	0.67^**	0.80^**	0.92^**	0.94^**		0.51±0.11
管围	初生Firstborn	0.51^**	0.40^**	0.39^**	0.51^**	0.31^**	0.37^**
Cannon	3月龄3-month-old	-0.05^**	0.35^**	0.55^**	0.58^**	0.27^**	0.26^**
cirumference	6月龄6-month-old	0.39^**	0.48^**	0.78^**	0.75^**	0.35^**	0.45^**
	周岁One-year-old	0.84^**	0.52^**	0.78^**	0.88^**	0.72^**	0.87^**
	成年Adult	0.48^**	0.78^**	0.25^**	0.68^**	0.72^**	0.60^**

Table 4 Genetic correlation coefficient and phenotypic correlation coefficient of growth traits of Luzhong mutton sheep

性状 Trait	生长阶段 Growth stage	体重 Body weight	体高 Body height	体长 Body length	胸围 Chest cirumference	胸宽 Chest width	胸深 Chest depth	管围 Cannon cirumference
体重	初生Firstborn		0.76±0.03	0.71±0.03	0.87±0.02	0.62±0.03	0.77±0.03	0.72±0.02
Body weight	3月龄3-month-old		0.50±0.03	0.20±0.07	0.68±0.05	0.57±0.04	0.73±0.05	0.01±0.09
	6月龄6-month-old		0.74±0.03	0.33±0.07	0.89±0.02	0.74±0.08	0.63±0.06	0.54±0.04
	周岁One-year-old		0.38±0.06	0.39±0.07	0.93±0.03	0.77±0.05	0.77±0.13	0.60±0.10
	成年Adult		0.56±0.11	0.20±0.19	0.98±0.02	0.97±0.02	0.86±0.09	0.64±0.07
体高	初生Firstborn	0.68^**		0.46±0.05	0.62±0.03	0.54±0.04	0.72±0.03	0.53±0.04
Body height	3月龄3-month-old	0.47^**		-0.30±0.08	0.87±0.04	0.80±0.04	0.66±0.06	0.52±0.08
	6月龄6-month-old	0.65^**		0.13±0.09	0.84±0.03	0.78±0.07	0.75±0.06	0.63±0.06
	周岁One-year-old	0.52^**		-0.52±0.07	0.55±0.07	0.64±0.05	0.50±0.17	0.79±0.07
	成年Adult	0.51^**		-0.49±0.15	0.57±0.08	0.61±0.08	0.55±0.12	0.71±0.04
体长	初生Firstborn	0.46^**	0.29^**		0.78±0.03	0.34±0.02	0.56±0.04	0.56±0.03
Body length	3月龄3-month-old	0.14^**	0.03		0.36±0.10	0.16±0.09	0.05±0.10	0.20±0.12
	6月龄6-month-old	0.18^**	0.10^**		0.54±0.07	0.30±0.12	0.26±0.11	0.78±0.05
	周岁One-year-old	0.80^**	0.07^**		0.20±0.11	-0.23±0.11	-0.01±0.23	0.14±0.17
	成年Adult	0.80^**	0.22^**		0.20±0.18	0.31±0.16	0.20±0.22	0.01±0.14
胸围	初生Firstborn	0.78^**	0.65^**	0.60^**		0.68±0.03	0.73±0.03	0.69±0.03
Chest	3月龄3-month-old	0.50^**	0.67^**	0.56^**		0.83±0.04	0.81±0.06	0.44±0.10
cirumference	6月龄6-month-old	0.72^**	0.77^**	0.54^**		0.79±0.06	0.75±0.05	0.82±0.03
	周岁One-year-old	0.93^**	0.58^**	0.73^**		0.83±0.05	0.64±0.18	0.52±0.13
	成年Adult	0.94^**	0.71^**	0.73^**		0.98±0.02	0.88±0.06	0.64±0.06
胸宽	初生Firstborn	0.56^**	0.56^**	0.34^**	0.65^**		0.68±0.03	0.39±0.04
Chest width	3月龄3-month-old	0.56^**	0.62^**	0.23^**	0.61^**		0.93±0.03	0.43±0.09
	6月龄6-month-old	0.28^**	0.45^**	0.30^**	0.46^**		0.91±0.04	0.54±0.09
	周岁One-year-old	0.84^**	0.68^**	0.50^**	0.86^**		0.41±0.19	0.28±0.16
	成年Adult	0.92^**	0.70^**	0.74^**	0.95^**		0.93±0.04	0.76±0.05
胸深	初生Firstborn	0.67^**	0.69^**	0.35^**	0.72^**	0.62^**		0.57±0.04
Chest depth	3月龄3-month-old	0.60^**	0.50^**	0.16^**	0.49^**	0.76^**		0.37±0.10
	6月龄6-month-old	0.29^**	0.47^**	0.37^**	0.54^**	0.72^**		0.53±0.08
	周岁One-year-old	0.82^**	0.43^**	0.74^**	0.85^**	0.76^**		0.71±0.23
	成年Adult	0.90^**	0.67^**	0.80^**	0.92^**	0.94^**		0.51±0.11
管围	初生Firstborn	0.51^**	0.40^**	0.39^**	0.51^**	0.31^**	0.37^**
Cannon	3月龄3-month-old	-0.05^**	0.35^**	0.55^**	0.58^**	0.27^**	0.26^**
cirumference	6月龄6-month-old	0.39^**	0.48^**	0.78^**	0.75^**	0.35^**	0.45^**
	周岁One-year-old	0.84^**	0.52^**	0.78^**	0.88^**	0.72^**	0.87^**
	成年Adult	0.48^**	0.78^**	0.25^**	0.68^**	0.72^**	0.60^**

Table 5 Genetic correlation coefficient and phenotype correlation coefficient between body weight at different growth stages of Luzhong mutton sheep

项目 Item	初生体重 Firstborn weight	3月龄体重 3-month-old weight	6月龄体重 6-month-old weight	周岁体重 One-year-old weight	成年体重 Adult weight
初生体重Firstborn weight	1	0.46±0.05	0.31±0.06	0.30±0.10	-0.01±0.08
3月龄体重3-month-old weight	0.22^**	1	0.77±0.01	0.82±0.01	-0.10±0.05
6月龄体重6-month-old weight	0.20^**	0.83^**	1	0.87±0.01	0.76±0.02
周岁体重One-year-old weight	0.18^**	0.34^**	0.28^**	1	0.48±0.10
成年体重Adult weight	0.12^**	0.01	0.10^**	0.91^**	1

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Estimation of genetic parameters of body size and body weight at different growth stages of Luzhong mutton sheep

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