Correlation analysis of growth and development rules and body weight and body size of Yemili chickens

doi:10.6048/j.issn.1001-4330.2023.05.028

Abstract

Abstract:

【Objective】 The purpose of this experiment is to study the growth and development rules of Yemili chickens and the correlation between body weight and body size indexes, so as to provide theoretical basis for scientific feeding and management of Yemili chickens.【Methods】 A total of 200 Yemili chickens (half male and half female) aged 0 days in the same batch with good health condition were selected, and their body weight and body size data of 0-20 weeks of age were measured and recorded.After the fitting analysis of the growth curve of the weight of males and hens by Logistic, Gompertz and Von Bertalanffy models, the correlation analysis of body weight and body size was carried out based on the results of week age at inflection point.【Results】 After 2 weeks of age, the body weight of cocks was significantly higher than that of hens (P < 0.01), and the growth peak of cocks and hens was reached at 8 weeks of age and 6 weeks of age, respectively.Logistic, Gompertz and Von Bertalanffy growth models all fitted the growth curve of Yemili chickens well, and the fitting degree was above 0.995, among which Gompertz model was the best one for the growth and development process of Yemili chicken body weight.In terms of body size, body oblique length, keel length, shin circumference, shin length, chest depth and back width of cocks at 2-20 weeks of age were significantly higher than those of hens (P< 0.01).The chest circumference of cocks aged 4-6 weeks was significantly higher than that of hens (P< 0.05), and that of cocks aged 8-20 weeks was significantly higher than that of hens (P< 0.01).The chest width of cocks at 6-20 weeks of age was significantly higher than that of hens (P< 0.01).In addition, correlation analysis showed that the body weight of 8-week-old cocks was positively correlated with body oblique length, chest depth, chest width and back width (P< 0.01).Body weight was positively correlated with keel length, chest circumference and tibial length (P< 0.05).The body weight of hens was positively correlated with keel length and breast width (P< 0.01).Body weight was positively correlated with body oblique length, chest circumference, tibial length, chest depth and back width (P< 0.05).【Conclusion】 In conclusion, under the conditions of this experiment, the growth curve of Yemili chickens is nearly "S" shape, and the best fitting model for body weight growth rule is the Gompertz model.Body oblique length, chest depth, chest width and back width could be used as indicators for the early weight selection of cocks, and keel length and chest width could be used as indicators for the early weight selection of hens.

Key words: Yemili chicken; growth and development law; growth curve; body ruler; correlation

摘要：

【目的】研究也迷离鸡的生长发育规律及体重、体尺指标间的相关性,为也迷离鸡的科学饲养管理提供理论依据。【方法】选取0日龄、同批次,且健康状况良好的也迷离鸡200只(公、母各半),测定并记录其0~20周龄的体重、体尺数据,通过Logistic、Gompertz和Von Bertalanffy模型对也迷离鸡公、母鸡的体重进行生长曲线拟合分析后,基于拐点周龄结果进行体重、体尺的相关性分析。【结果】2周龄以后公鸡体重极显著大于母鸡(P<0.01),公鸡和母鸡分别在8周龄和6周龄达到生长高峰期;Logistic、Gompertz和Von Bertalanffy生长模型均能很好的拟合也迷离鸡的生长曲线,拟合度均在0.995以上,其中Gompertz模型为也迷离鸡体重生长发育过程的最佳模型。在体尺指标方面,2~20周龄,公鸡的体斜长、龙骨长、胫围、胫长、胸深和背宽均极显著高于母鸡(P<0.01);4~6周龄公鸡的胸围显著高于母鸡(P<0.05),8~20周龄公鸡的胸围极显著高于母鸡(P<0.01);在6~20周龄公鸡的胸宽极显著高于母鸡(P<0.01)。8周龄公鸡的体重与体斜长、胸深、胸宽、背宽之间均呈极显著正相关(P<0.01),与龙骨长、胸围和胫长之间呈显著正相关(P<0.05);母鸡的体重与龙骨长、胸宽之间均呈极显著正相关(P<0.01),与体斜长、胸围、胫长、胸深和背宽之间具有显著正相关(P<0.05)。【结论】也迷离鸡的生长曲线呈近“S”型,体重生长规律的最佳拟合模型是Gompertz模型,体斜长、胸深、胸宽和背宽可作为公鸡早期体重选择指标,龙骨长和胸宽可作为母鸡早期体重选择指标。

关键词: 也迷离鸡, 生长发育规律, 生长曲线, 体尺, 相关性

CLC Number:

S831

LI Jiahui, ZHAO Xiaoyu, LI Haiying, ZHANG Lihua, ZHANG Jie, WEI Yan, ZHOU jun, ZHAO Quanzhuang, LI Zongfu. Correlation analysis of growth and development rules and body weight and body size of Yemili chickens[J]. Xinjiang Agricultural Sciences, 2023, 60(5): 1281-1291.

李家辉, 赵晓钰, 李海英, 张俐华, 张杰, 魏彦, 周军, 赵全庄, 李宗福. 也迷离鸡生长发育规律及体重体尺的相关性分析[J]. 新疆农业科学, 2023, 60(5): 1281-1291.

Figures/Tables 13

Tab.1 Diet composition and nutrient level

项目 Items	0~3周龄 0-3 Week	3~7周龄 3-7 Week	7~20周龄 7-20 Week
日粮组成 Diet composition
玉米 Corn(%)	58.35	58.15	58.40
小麦粉 Wheat flour(%)	5.00	5.00	10.00
大豆粕 Soybean meal(%)	8.50	5.00	0.00
棉籽粕 Cottonseed meal(%)	10.20	9.60	8.90
辣椒粕 Pepper meal(%)	0.00	3.00	3.00
玉米胚芽粕 Corn germ meal(%)	8.00	8.00	8.00
玉米蛋白粉 Corn gluten meal(%)	5.00	5.00	5.00
棉籽油 Cottonseed oil(%)	0.50	2.00	2.60
细石粉 Fine stone powder(%)	1.45	1.25	1.10
预混料1 Premix1(%)	3.00	0.00	0.00
预混料2 Premix2(%)	0.00	3.00	3.00
合计 Total	100	100	100
营养水平 Nutritional level
粗蛋白 CP(%)	19.5	18.1	16.1
粗脂肪 EE(%)	2.74	4.20	4.84
粗纤维 CF(%)	3.04	3.01	3.04
钙 Ca(%)	0.92	0.86	0.72
总磷 TP(%)	0.60	0.57	0.52
有效磷 AP(%)	0.35	0.34	0.31
代谢能 ME(MJ/kg)	12.18	12.59	13.08
精氨酸 Arginine(%)	1.28	1.16	1.01
异亮氨酸 Isoleucine(%)	0.80	0.69	0.55
赖氨酸 Lysine(%)	1.23	1.13	0.87
蛋氨酸 Methionine(%)	0.53	0.51	0.40
蛋氨酸+胱氨酸 D-SAA(%)	0.86	0.82	0.69
苏氨酸 Threonine(%)	0.84	0.79	0.63
色氨酸 Tryptophan(%)	0.21	0.19	0.14
缬氨酸 Valine(%)	0.89	0.82	0.74

Tab.2 3 Common growth curve models

模型 Model	表达式 Expression	拐点体重 Inflection point weight	拐点周龄 Inflecting age
Logistic	Y=A/(1+Be^-^Kt)	A/2	(InB)/K
Gompertz	Y=Ae^-^Bexp^(-^Kt⁾	A/e	(InB)/K
Von Bertalanffy	Y=A(1-Be^-^Kt)³	8A/27	(In3B)/K

Tab.3 Weight comparison of roosters and hens of different weeks

周龄 Week	公鸡 Male chicken(g)	母鸡 Female chicken(g)
0	32.22±2.85
2	121.24±8.43^A	95.79±10.47^B
4	254.70±16.58^A	210.61±15.67^B
6	511.84±49.81^A	424.06±49.85^B
8	812.89±67.55^A	625.72±64.79^B
10	1 085.09±91.11^A	787.50±69.67^B
12	1 310.46±85.94^A	963.46±45.94^B
14	1 553.55±125.17^A	1 124.91±88.72^B
16	1 661.86±104.50^A	1 219.73±110.78^B
18	1 796.28±159.09^A	1 352.44±120.37^B
20	1 968.36±153.38^A	1 405.34±119.96^B

Fig.1 Cumulative growth curve of Yemili chickens

Fig.2 Absolute growth curve of Yemili chickens

Fig.3 Relative growth curve of Yemili chickens

Tab.4 Model parameter estimation of Yemili chicken body weight growth curve

性别 Gender	模型 Model	参数估计值 Parameter estimates			拟合度 Goodness of fit	拐点周龄 Inflecting age/w	拐点体重 Inflecting body weight(g)
		A	K	B
		公Male	Logistic	1 949.780				0.314	19.662	0.995	9.480	974.890
Gompertz	2 167.048		0.178	4.179	0.999	8.034	797.212
Von Bertalanffy	2 345.558		0.133	0.865	0.999	7.170	694.980
母Female	Logistic	1 430.861	0.300	16.495	0.995	9.344	715.431
	Gompertz	1 586.980	0.172	3.827	0.999	7.803	583.817
	Von Bertalanffy	1 717.118	0.128	0.811	0.999	6.946	508.776

Tab.5 The measured of Yemili chicken body weight was compared with the three curve-fitting estimates

性别 Gender	模型 Model	0	2	4	6	8	10	12	14	16	18	20
公 Male	实测值	32.22	121.24	254.70	511.84	812.89	1 085.09	1 310.46	1 553.55	1 661.86	1 796.28	1 968.36
	Logistic	94.55	169.97	295.95	489.63	752.39	1 054.34	1 341.68	1 570.03	1 726.88	1 824.13	1 880.65
	Gompertz	33.19	116.03	278.84	515.34	792.37	1 071.04	1 322.75	1 533.54	1 700.89	1 828.87	1 924.22
	Von Bertalanffy	5.77	89.80	279.13	533.85	809.76	1 075.97	1 315.45	1 521.32	1 692.89	1 832.78	1 945.07
母 Female	实测值	32.22	95.79	210.61	424.06	625.72	787.50	963.46	1 124.91	1 219.73	1 352.44	1 405.34
	Logistic	81.79	142.34	239.75	383.96	573.17	785.65	986.32	1 147.12	1 259.84	1 331.65	1 374.66
	Gompertz	34.56	105.27	231.88	405.88	603.62	799.75	976.30	1 124.59	1 243.18	1 334.74	1 403.71
	Von Bertalanffy	11.59	88.52	233.14	416.70	611.27	797.78	965.73	1 110.83	1 232.63	1 332.81	1 413.98

Fig.4 The measured values of roosters were compared with the fitting of three simulated growth curves

Tab.6 Comparison of body size indicators of roosters and hens at different ages

周龄 Week	性别 Gender	体重 Weight (kg)	体斜长 Body oblique (cm)	龙骨长 Keel length (cm)	胸围 Chest circumfere- nce(cm)	胫围 Keel length (cm)	胫长 Shin length (cm)	胸深 Chest depth (cm)	胸宽 Shin length (cm)	背宽 Back width (cm)
2	公	121.24±8.43^A	8.52±0.27^A	3.89±0.31	10.30±0.60	2.01±0.11^A	3.98±0.21^A	4.78±0.19^A	3.30±0.21	3.44±0.17^A
2	母	95.79±10.47^B	8.21±0.39^B	3.74±0.25	9.96±0.61	1.90±0.10^B	3.79±0.22^B	4.49±0.22^B	3.12±0.22	3.23±0.16^B
4	公	254.70±16.58^A	10.84±0.81^A	5.53±0.40^A	14.35±1.12^a	3.04±0.17^A	5.84±0.41^A	5.64±0.47^A	3.86±0.37	3.64±0.31^A
4	母	210.61±15.67^B	9.62±0.89^B	5.08±0.40^B	13.44±1.01^b	2.81±0.15^B	5.42±0.46^A	4.98±0.80^B	3.69±0.31	3.38±0.24^B
6	公	511.84±49.81^A	13.16±0.45^A	7.23±0.43^A	18.55±0.98^a	3.42±0.14^A	7.10±0.48^A	7.41±0.45^A	4.67±0.27^A	5.56±0.32^A
6	母	424.06±49.85^B	11.78±0.37^B	6.15±0.37^B	17.99±0.63^b	3.17±0.13^B	6.63±0.39^B	6.83±0.49^B	4.35±0.24^B	5.02±0.22^B
8	公	812.89±67.55^A	16.34±0.92^A	8.41±0.43^A	22.69±1.09^A	3.73±0.14^A	8.69±0.35^A	8.97±0.52^A	6.08±0.33^A	6.77±0.35^A
8	母	625.72±64.79^B	14.71±0.82^B	7.63±0.25^B	19.78±0.90^B	3.48±0.28^B	7.77±0.50^B	7.08±0.36^B	5.37±0.33^B	5.94±0.44^B
10	公	1085.09±91.11^A	16.80±0.90^A	9.22±0.46^A	25.96±1.84^A	3.98±0.20^A	9.69±0.35^A	9.84±0.37^A	6.81±0.47^A	7.23±0.42^A
10	母	787.50±69.67^B	15.76±1.14^B	8.52±0.54^B	24.05±0.89^B	3.50±0.12^B	8.61±0.32^B	9.02±0.44^B	5.91±0.35^B	6.15±0.51^B
12	公	1310.46±85.94^A	20.06±1.03^A	11.86±1.47^A	27.28±1.96^A	3.89±0.16^A	10.53±0.42^A	10.01±0.78^A	7.15±0.57^A	7.46±0.50^A
12	母	963.46±45.94^B	18.58±0.47^B	10.40±1.00^B	24.99±1.26^B	3.46±0.17^B	9.11±0.37^B	9.42±0.44^B	6.45±0.47^B	6.41±0.48^B
14	公	1553.55±125.17^A	22.21±0.78^A	12.66±0.97^A	29.35±1.32^A	4.18±0.15^A	10.88±0.53^A	11.32±0.34^A	7.54±0.27^A	7.67±0.50^A
14	母	1124.91±88.72^B	19.86±0.85^B	11.24±1.23^B	26.65±2.83^B	3.74±0.28^B	9.37±0.57^B	9.97±0.48^B	6.66±0.24^B	6.64±0.23^B
16	公	1661.86±104.50^A	23.02±0.99^A	12.82±0.94^A	29.51±1.05^A	4.35±0.25^A	10.97±0.66^A	11.32±0.42^A	7.75±0.54^A	8.06±0.46^A
16	母	1219.73±110.78^B	20.41±0.53^B	11.89±0.95^B	26.99±1.19^B	3.77±0.27^B	9.43±0.51^B	9.98±0.30^B	6.68±0.20^B	6.92±0.64^B
18	公	1796.28±159.09^A	24.63±1.14^A	12.87±0.54^A	31.34±1.46^A	4.50±0.19^A	11.69±0.68^A	12.44±0.84^A	8.55±0.68^A	9.13±0.64^A
18	母	1352.44±120.37^B	21.11±1.40^B	11.98±1.01^B	28.62±1.12^B	3.83±0.19^B	9.58±0.47^B	10.11±0.29^B	7.24±0.30^B	7.14±0.43^B
20	公	1968.36±153.38^A	24.74±1.14^A	12.91±0.83^A	31.59±1.51^A	4.69±0.17^A	11.71±0.61^A	12.45±0.80^A	8.56±0.80^A	9.14±0.42^A
20	母	1405.34±119.96^B	21.19±1.14^B	12.00±1.10^B	28.60±0.81^B	3.86±0.21^B	9.66±0.49^B	10.28±0.31^B	7.25±0.45^B	7.72±0.33^B

Tab.6 Comparison of body size indicators of roosters and hens at different ages

周龄 Week	性别 Gender	体重 Weight (kg)	体斜长 Body oblique (cm)	龙骨长 Keel length (cm)	胸围 Chest circumfere- nce(cm)	胫围 Keel length (cm)	胫长 Shin length (cm)	胸深 Chest depth (cm)	胸宽 Shin length (cm)	背宽 Back width (cm)
2	公	121.24±8.43^A	8.52±0.27^A	3.89±0.31	10.30±0.60	2.01±0.11^A	3.98±0.21^A	4.78±0.19^A	3.30±0.21	3.44±0.17^A
2	母	95.79±10.47^B	8.21±0.39^B	3.74±0.25	9.96±0.61	1.90±0.10^B	3.79±0.22^B	4.49±0.22^B	3.12±0.22	3.23±0.16^B
4	公	254.70±16.58^A	10.84±0.81^A	5.53±0.40^A	14.35±1.12^a	3.04±0.17^A	5.84±0.41^A	5.64±0.47^A	3.86±0.37	3.64±0.31^A
4	母	210.61±15.67^B	9.62±0.89^B	5.08±0.40^B	13.44±1.01^b	2.81±0.15^B	5.42±0.46^A	4.98±0.80^B	3.69±0.31	3.38±0.24^B
6	公	511.84±49.81^A	13.16±0.45^A	7.23±0.43^A	18.55±0.98^a	3.42±0.14^A	7.10±0.48^A	7.41±0.45^A	4.67±0.27^A	5.56±0.32^A
6	母	424.06±49.85^B	11.78±0.37^B	6.15±0.37^B	17.99±0.63^b	3.17±0.13^B	6.63±0.39^B	6.83±0.49^B	4.35±0.24^B	5.02±0.22^B
8	公	812.89±67.55^A	16.34±0.92^A	8.41±0.43^A	22.69±1.09^A	3.73±0.14^A	8.69±0.35^A	8.97±0.52^A	6.08±0.33^A	6.77±0.35^A
8	母	625.72±64.79^B	14.71±0.82^B	7.63±0.25^B	19.78±0.90^B	3.48±0.28^B	7.77±0.50^B	7.08±0.36^B	5.37±0.33^B	5.94±0.44^B
10	公	1085.09±91.11^A	16.80±0.90^A	9.22±0.46^A	25.96±1.84^A	3.98±0.20^A	9.69±0.35^A	9.84±0.37^A	6.81±0.47^A	7.23±0.42^A
10	母	787.50±69.67^B	15.76±1.14^B	8.52±0.54^B	24.05±0.89^B	3.50±0.12^B	8.61±0.32^B	9.02±0.44^B	5.91±0.35^B	6.15±0.51^B
12	公	1310.46±85.94^A	20.06±1.03^A	11.86±1.47^A	27.28±1.96^A	3.89±0.16^A	10.53±0.42^A	10.01±0.78^A	7.15±0.57^A	7.46±0.50^A
12	母	963.46±45.94^B	18.58±0.47^B	10.40±1.00^B	24.99±1.26^B	3.46±0.17^B	9.11±0.37^B	9.42±0.44^B	6.45±0.47^B	6.41±0.48^B
14	公	1553.55±125.17^A	22.21±0.78^A	12.66±0.97^A	29.35±1.32^A	4.18±0.15^A	10.88±0.53^A	11.32±0.34^A	7.54±0.27^A	7.67±0.50^A
14	母	1124.91±88.72^B	19.86±0.85^B	11.24±1.23^B	26.65±2.83^B	3.74±0.28^B	9.37±0.57^B	9.97±0.48^B	6.66±0.24^B	6.64±0.23^B
16	公	1661.86±104.50^A	23.02±0.99^A	12.82±0.94^A	29.51±1.05^A	4.35±0.25^A	10.97±0.66^A	11.32±0.42^A	7.75±0.54^A	8.06±0.46^A
16	母	1219.73±110.78^B	20.41±0.53^B	11.89±0.95^B	26.99±1.19^B	3.77±0.27^B	9.43±0.51^B	9.98±0.30^B	6.68±0.20^B	6.92±0.64^B
18	公	1796.28±159.09^A	24.63±1.14^A	12.87±0.54^A	31.34±1.46^A	4.50±0.19^A	11.69±0.68^A	12.44±0.84^A	8.55±0.68^A	9.13±0.64^A
18	母	1352.44±120.37^B	21.11±1.40^B	11.98±1.01^B	28.62±1.12^B	3.83±0.19^B	9.58±0.47^B	10.11±0.29^B	7.24±0.30^B	7.14±0.43^B
20	公	1968.36±153.38^A	24.74±1.14^A	12.91±0.83^A	31.59±1.51^A	4.69±0.17^A	11.71±0.61^A	12.45±0.80^A	8.56±0.80^A	9.14±0.42^A
20	母	1405.34±119.96^B	21.19±1.14^B	12.00±1.10^B	28.60±0.81^B	3.86±0.21^B	9.66±0.49^B	10.28±0.31^B	7.25±0.45^B	7.72±0.33^B

Fig.5 The measured values of hens were compared with the fitting of three simulated growth curves

Tab.7 Correlation analysis of body weight and body size of 8-week-old roosters

项目 Items	体重 Weight	体斜长 Body oblique	龙骨长 Keel length	胸围 Chest circumfer- ence	胫围 Keel length	胫长 Shin length	胸深 Chest depth	胸宽 Shin length	背宽 Back width
体重Weight	1	0.99 $4 * *$	0.974^*	0.988^*	0.895	0.984^*	0.99 $8 * *$	0.99 $6 * *$	0.99 $1 * *$
体斜长 Body oblique		1	0.987^*	0.99 $7 * *$	0.935	0.99 $6 * *$	0.99 $4 * *$	0.99 $1 * *$	0.971^*
龙骨长 Keel length			1	0.99 $7 * *$	0.967^*	0.99 $7 * *$	0.984^*	0.959^*	0.951^*
胸围 Chest circumfer- ence				1	0.954^*	0.99 $9 * *$	0.99 $2 * *$	0.978^*	0.965^*
胫围Keel length					1	0.960^*	0.910	0.880	0.843
胫长Shin length						1	0.988^*	0.976^*	0.957^*
胸深Chest depth							1	0.989^*	0.99 $0 * *$
胸宽Shin length								1	0.982^*
背宽Back width									1

Tab.7 Correlation analysis of body weight and body size of 8-week-old roosters

项目 Items	体重 Weight	体斜长 Body oblique	龙骨长 Keel length	胸围 Chest circumfer- ence	胫围 Keel length	胫长 Shin length	胸深 Chest depth	胸宽 Shin length	背宽 Back width
体重Weight	1	0.99 $4 * *$	0.974^*	0.988^*	0.895	0.984^*	0.99 $8 * *$	0.99 $6 * *$	0.99 $1 * *$
体斜长 Body oblique		1	0.987^*	0.99 $7 * *$	0.935	0.99 $6 * *$	0.99 $4 * *$	0.99 $1 * *$	0.971^*
龙骨长 Keel length			1	0.99 $7 * *$	0.967^*	0.99 $7 * *$	0.984^*	0.959^*	0.951^*
胸围 Chest circumfer- ence				1	0.954^*	0.99 $9 * *$	0.99 $2 * *$	0.978^*	0.965^*
胫围Keel length					1	0.960^*	0.910	0.880	0.843
胫长Shin length						1	0.988^*	0.976^*	0.957^*
胸深Chest depth							1	0.989^*	0.99 $0 * *$
胸宽Shin length								1	0.982^*
背宽Back width									1

Tab.8 Correlation analysis of body weight and body size of 8-week-old hens

项目 Items	体重 Weight	体斜长 Body oblique	龙骨长 Keel length	胸围 Chest circumfer- ence	胫围 Keel length	胫长 Shin length	胸深 Chest depth	胸宽 Shin length	背宽 Back width
体重 Weight	1	0.978^*	0.99 $0 * *$	0.975^*	0.870	0.978^*	0.966^*	0.99 $5 * *$	0.978^*
体斜长 Body oblique		1	0.99 $5 * *$	0.954^*	0.923	0.983^*	0.902	0.989^*	0.912
龙骨长 Keel length			1	0.977^*	0.925	0.99 $4 * *$	0.939	0.99 $2 * *$	0.943
胸围 Chest circumfer- ence				1	0.927	0.99 $0 * *$	0.978^*	0.956^*	0.960^*
胫围Keel length					1	0.953^*	0.828	0.870	0.791
胫长Shin length						1	0.946	0.973^*	0.935
胸深Chest depth							1	0.934	0.99 $2 * *$
胸宽Shin length								1	0.954^*
背宽Back width									1

Tab.8 Correlation analysis of body weight and body size of 8-week-old hens

项目 Items	体重 Weight	体斜长 Body oblique	龙骨长 Keel length	胸围 Chest circumfer- ence	胫围 Keel length	胫长 Shin length	胸深 Chest depth	胸宽 Shin length	背宽 Back width
体重 Weight	1	0.978^*	0.99 $0 * *$	0.975^*	0.870	0.978^*	0.966^*	0.99 $5 * *$	0.978^*
体斜长 Body oblique		1	0.99 $5 * *$	0.954^*	0.923	0.983^*	0.902	0.989^*	0.912
龙骨长 Keel length			1	0.977^*	0.925	0.99 $4 * *$	0.939	0.99 $2 * *$	0.943
胸围 Chest circumfer- ence				1	0.927	0.99 $0 * *$	0.978^*	0.956^*	0.960^*
胫围Keel length					1	0.953^*	0.828	0.870	0.791
胫长Shin length						1	0.946	0.973^*	0.935
胸深Chest depth							1	0.934	0.99 $2 * *$
胸宽Shin length								1	0.954^*
背宽Back width									1

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