A breeding method for improving the reproductive performance of Diqing Tibetan pigs

Abstract

The invention discloses a breeding method for improving the reproductive performance of Diqing Tibetan pigs, comprising the following steps: mating wild boar boars with Diqing Tibetan pig sows, and screening wild Tibetan boars; mating Duroc boars with Saba pig sows , to screen Dusa sows; the selected wild Tibetan boars are raised to 5-6 months old, and the selected Dusa sows are raised to 6-7 months old and used after one estrus period; the second Dusa sows The wild Tibetan boars were used for the first mating 12 hours after the first estrus, and the piglets were re-breeded at an interval of 12 hours; the piglets were supplemented at the age of 7 days to 10 days after birth, and the piglets were weaned at the age of 53 days to 60 days. The present invention innovates the way of utilizing Diqing Tibetan pigs: first use wild boars and Diqing Tibetan pigs, Duroc pigs and Saba pigs to hybridize respectively, and then perform hybridization between the two hybrids. The hybrid pigs of the present invention have better reproductive performance and growth , carcass and meat quality have produced heterosis, and the effect is more obvious.

Description

technical field [0001] The invention belongs to the technical field of agriculture, animal husbandry and breeding, and in particular relates to a breeding method for improving the reproductive performance of Diqing Tibetan pigs. Background technique [0002] Diqing Tibetan pig is one of the types of Tibetan pigs. It has the advantages of being able to adapt to the cold and low oxygen climate on the plateau and has good meat quality. It is a grazing pig breed that can adapt to the cold and low oxygen climate on the plateau and extensive feeding management conditions. Slow growth, good meat quality, high crude protein content, unsaturated fatty acid content and essential fatty acid content in muscle, it is a kind of health meat that meets the needs of modern consumption. [0003] The current breeding method of Diqing Tibetan pigs is mainly free-ranging. They graze together with yaks all year round. After returning to the owner’s home at night, they will be supplemented with hi...

AI Technical Summary

Problems solved by technology

[0005] 1. The reproductive traits of pigs are low-heritability traits, and it takes a long time to improve through pure breeding. In addition, the existing programs are all produced by purebred breeding without selective breeding, so it is more difficult to improve reproductive performance;

[0006] 2. Use small boars for breeding. The boars have not reached physical maturity, the quality of semen is not high, and there is no purposeful selection and matching. Highly inbred methods such as mother-child mating, full-sibling mating or half-sibling mating are used in breeding. Free breeding during grazing in the wild can lead to inbreeding depression, and naturally the litter size and birth weight of piglets will not be high;

[0007] 3. Free-range feeding is adopted, and the nursing piglets are not treated with heat preservation, iron supplementation, feeding, and water replenishment. The feeding and management conditions cannot meet the physiological needs of piglets, and the growth rate of piglets is slow and the survival rate is low;

[0008] 4. The basic nutritional needs of sows and piglets are not met by feeding during the day and supplementary feeding at night, which may lead to low birth weight of piglets or even death during pregnancy, slow growth or even death during lactation, and poor weaning survival rate of piglets. Low

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