There is a question and answer: How about the reproductive performance of ternary sows?

Release time:

Mar 06,2024

Case 1: Comparison between Du Changda Sanyuan Sow and Growing Binary Sow^[1]

The difference in reproductive performance between grown-up ternary sows and grown-up binary sows is obvious at the time of one litter, which is mainly reflected in: the total litter size, live litter size, weaning litter weight and lactation volume of grown-up ternary sows are 1.5, 1.54, 10.64kg and 22.15kg less than those of grown-up binary sows respectively. This difference is mainly determined by breed genes. The difference in reproductive performance between the two breeds was not obvious when the second child was born, indicating that the production management erased the genetic differences between the two breeds. From the data point of view, the weaning litter weight and lactation volume of Du Changda Sanyuan sow were 5.22kg and 11.17kg less than those of the grown binary sow respectively.

Project	Grow up	Du grew up	P value
One-child comparison
Number of nests	30	36	/
Pregnancy, Days	113.6	113.94	NS
Total litter size, head	12.13	10.63	＜0.05
Number of live births, head	11.73	10.19	＜0.05
Primary litter weight, kg	19.71	18.22	NS
Average birth weight, kg	1.68	1.8	NS
Weight of corrected weaning litter at 26 days, kg	87.48	76.84	＜0.01
Corrected weaning weight at 26 days, kg	7.48	7.55	NS
21-day lactation, kg	164.21	142.06	＜0.01
26 days of correction survival rate,%	100	98.34	NS
Second-child comparison
Number of nests	20	31	/
Pregnancy, Days	113.6	114.19	＜0.05
Total litter size, head	11.87	11.13	NS
Number of live births, head	11.53	10.75	NS
Primary litter weight, kg	19.3	18.69	NS
Average birth weight, kg	1.68	1.74	NS
Weight of corrected weaning litter at 26 days, kg	85.55	80.33	NS
Corrected weaning weight at 26 days, kg	7.46	7.54	NS
21-day lactation, kg	160.52	149.35	NS
26 days of correction survival rate,%	99.79	99.07	NS

NS marked difference was not significant, P<0.05 marked difference was significant. Same below.

Case 2: Du grows up as a female parent, and it is better to breed with long white boars and large white boars.^[2]

From the numerical point of view, Du grew up as the female parent, Landrace pig, large white pig as a boar hybrid, reproductive performance is still slightly better than Duroc boar hybrid.

Project	Du long ternary sow, cross with different breeds of boars			P value
Project	American Duroc Boar	Dan Landrace Boar	Plus line big white boar	P value
Number of live births, head	10.12	10.25	10.21	NS
Birth weight, kg	1.41	1.42	1.45	NS
Weaning Number, Head	9.09	9.3	9.36	NS
Weaning weight, kg	6.57	6.95	7.12	NS
Average daily gain, g/head/day	224.35	240.43	246.42	＜0.05
Survival rate,%	89.82	90.71	91.64	NS

Case 3: Reproductive performance of large and long ternary sows^[3]

Although the bloodline is still long white and large white, the reproductive performance of large-length three-yuan sows is much worse than that of large-length two-yuan sows.

parity	binary sow (grown binary sow)				ternary sow (Large and long ternary sows produced by crossing large binary sows and large white boars)
parity	Number of nests (Nest)	total litter size (Head/Nest)	Number of healthy cubs (Head/Nest)	survival rate （%）	Number of nests (Nest)	total litter size (Head/Nest)	Number of healthy cubs (Head/Nest)	survival rate （%）
One birth	5774	13.07	12.23	93.57	3078	9.95	9.37	94.17
Second child	5661	13.81	13.3	96.31	3424	11.23	10.78	95.99
Three births	4685	13.1	13.09	99.92	3183	11.31	11.08	97.97
Four-child	3829	13.07	13.07	100	2737	11.1	11.1	100
five births	668	12.93	12.93	100	2126	11	11	100

References

[1] Yuan Xuebo, Ding Hao, Bai Xuefeng, etc. Comparative study on reproductive performance of binary sows and ternary sows [J]. Pig farming, 2022(03):40-43.DOI:10.13257/j.cn ki.21-1104/s.2022.03.018.).

[2] Yang Zhihua, Zhou Xiaoyi, Yao Guozhong, etc. Effects of different paternal breeds on reproductive performance of ternary sows and growth performance of piglets [J]. Zhejiang Animal Husbandry and Veterinary Medicine, 2023,48(02):7 6.

[3] Zhou Yang. Effect of breeding month and parity on reproductive performance of binary sows and ternary sows [D]. Jiangxi Agricultural University, 2022.DOI: 10.27177/d.cn ki.gjxnu. 2022.000614.

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