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The purpose of this study was to analyze the differences of production performance， meat quality traits and serum biochemical indicators between Yushan black pigs and its two-way cross pigs， and provide the reference for the hybrid utilization of Yushan black pig. In this study， the healthy Yushan black pigs and its two-way cross pigs were used and divided into 4 groups which included YY， DY， BY and SY with 3 replicates with 5 individuals per replicate. All of the experimental pigs were uniformly castrated and fattened with same body weight， the feed nutritional level and feeding management were consistent. When the pigs were raised until 250 days， each group selected 8 individuals （half castrated male and half castrated female） for slaughter， and serum was collected to detect biochemical indicators. The results showed that： 1） The average daily gain （ADG） of DY at the early fattening period was highest， the ADG of BY at the late fattening period was highest， the ADG of BY at the entire fattening period was the highest， and ADG of the 3 hybrid groups at the entire fattening period was significantly higher than that of YY group （P<0.01）. 2） The feed conversion ratio （FCR） of YY at the early fattening period was significantly higher than that of DY （P<0.01） and BY （P<0.05）， and the FCR of YY at the late fattening period was significantly higher than that of BY （P<0.01）， the FCR of YY at the entire fattening period was the highest and BY was the lowest. 3） The ADG of BY at the late fattening period was higher than that at the early fattening period （P<0.05）， while the ADG of other 3 groups were not different between the early fattening period and late fattening period （P>0.05）. 4） The FCR of the 4 groups at the late fattening period were significantly higher than that at the early fattening period （P<0.05）. 5） The slaughter performance of the 3 hybrid groups were significantly improved compared to the YY group. 6） The correlation analysis results found that， there was a significant positive correlation （P<0.05） between most slaughter traits and between slaughter traits and fattening traits， but there was a significant negative correlation （P<0.05） between ADG at early fattening period and fat percentage （P<0.05）. 7） The intramuscular fat content of YY was significantly higher than that of BY and SY （P<0.01）， the marbling score of DY was significantly higher than that of BY （P<0.05）， the drip loss of SY was significantly higher than that of YY and DY （P<0.01）， the shear force of BY was significantly higher than that of YY （P<0.01）， and the cooked meat percentage of BY was significantly higher than that of SY （P<0.01）. 8） There was no significant difference （P>0.05） in the level of serum immune indicators， CAT， T-AOC and blood lipid indicators between YY group and 3 hybrid groups. However， the serum GSH-Px level of YY group was significantly lower than that in SY group （P<0.01）， the serum MDA level was significantly higher than that in DY group （P<0.01）， the serum SOD level was significantly higher than that in SY group （P<0.05）， and the GLU level was significantly lower than that in BY （P<0.05） and SY （P<0.01） groups. In summary， the important production indicators such as growth and development traits， FCR and slaughter performance were significantly improved but the meat quality traits were decreased in these 3 hybrid groups compared to Yushan black pigs， while the immune and antioxidant ability were not significantly changed. The study results showed that， the DY and BY two-way cross combination were more suitable for the hybrid utilization of Yushan black pig.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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