Breeding method of high-yield and disease-resistant new line of Meishan pig
A high-yield, disease-resistant, and breeding method technology, which is applied in animal husbandry and other fields, can solve problems such as the conception rate of sows, the decrease in the survival rate of weaned piglets born alive, the inability to fully exert the high fecundity of Meishan pigs, and the decline in disease resistance, etc. problem, to achieve the effect of improving general disease resistance, improving immune response ability, and meat quality
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[0027] (1) Carry out F18 Escherichia coli (purchased from the China Veterinary Drug Administration) infection test on the core group of Meishan pigs by adding feed, according to the results of phenotypic identification, set up the basic group of Meishan pigs F18 Escherichia coli disease-resistant breeding;
[0028] 1) Bacterial culture Inoculate a single colony of F18 Escherichia coli into 3-5 mL of LB medium, culture it with shaking at 37°C overnight (about 18 hours), wash the bacteria with PBS repeatedly for 3 times the next day, and inoculate the Escherichia coli strain Dilute with PBS at a ratio of 1:20, and adjust the bacterial concentration to 4.6×10 8 CFU / L.
[0029] 2) Feed preparation According to the nutritional requirements of weaned piglets, feed pellets containing 21.7% crude protein. The feed does not contain any antibiotics and probiotics. The main purpose of preparing feed that does not contain antibiotics and probiotics is to avoid antibiotics in the feed. In...
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