The overall strategy for breeding pigs in China is to make full use of the existing excellent breeding resources, establish a regional joint breeding system in areas where breeding pig production and research are advantageous, and actively apply the research of modern pig breeding techniques that organically combines molecular breeding and genetic evaluation. Establishment of a company-based breeding system to achieve rapid and sustainable genetic improvement of the quality of breeding pigs. The overall strategy is to establish a breeding system capable of continuous improvement of lean-type breeders for a long period of time, and to realize the overall objective of “based on breeder breeding, self-sufficiency of core group sows, systematic introduction of small numbers, and keeping of international pig breeding levels at the same time”.

Focusing on this goal, taking digestion, absorption, innovation and promotion as the main body, and supplementing the introduction of new germplasm resources, we have actively established a national breeder pig genetic evaluation system and a lean-breeding pig breeding system that have the potential for self-development, while focusing on the following 5 Research in all aspects.

Establish regional and national joint breeding systems

Using regional joint breeding methods, in certain major pig production areas such as Beijing, South China, Central China, and Southwest China, select qualified technical support units and organize relevant pig-breeding enterprises to jointly establish a joint breeding system to accelerate regionalization. The Central Boar Station is the link between the breeding pig genetic connection network and the breeding of our own specialized high-quality lean hog breeding line. We use local resources to breed new strains with high fecundity and excellent meat quality. On this basis, a national-level joint breeding system will gradually be formed.

Establishing a genetic evaluation system for high-quality lean pigs

The use of modern information technology to establish a standardized breeder information database and the development of an online breeder pig genetic evaluation system based on the "Browser/Web Server/Database System" three-tier network architecture to promote the establishment of genetic linkages in large, medium and small breeder farms. Cross-field genetic linkages improve the accuracy of intra- and inter-field genetic assessments, and conduct regional cross-field genetic evaluation, genetic parameter assessment, and economic weighting coefficients.

Cultivating China's lean-type pigs and new strains

On the basis of the establishment of a national-level regional joint breeding system, the cultivation of new strains of cross-fields and the breeding of matching systems will be carried out to achieve the purpose of rational use of resources and complementary advantages. To achieve large-scale cross-breeding pigs combining ability determination, screening suitable for large-scale feeding, adapting to different production conditions, efficient hybrid combinations, regional optimized combination of supporting systems.

Establishing a sustainable and efficient breeding system for high-quality lean-type pigs

Established a breeding system for breeding pigs with the following principles: “Importing breeding stock core groups→breeding core groups→breeding swarm expansion→breeding pig production→commercial hog production” to explore the company based on the large swine breeding companies in the existing breeding pig production system The breeding breeding system, through the new model of "Technology Center + Breeding Company + Breeding Company + Pig Breeding Specialist + Pig-raising Family", coordinates the interests of producers of different functional groups and carries out long-term breeding and improvement of breeding pigs.

Large-scale application of new breeding technologies

The development of modern biotechnology has provided a whole new approach for breeding pigs. Molecular breeding technology based on large-scale genetic testing has been widely used. The number of major genes and genetic markers used in commercial applications has reached several tens of thousands. The accuracy and efficiency of traditional selection methods also provide more effective means for early selection and indirect selection. Molecular biology technology has also shown good prospects for the prediction and utilization of heterosis. The effective and large-scale application of new breeding technologies within the combined breeding system will completely change the passive backwardness of pig breeding in China.

The pressure of international competition brought about by the global economic integration is increasing, and the future competition will be a comprehensive competition between high-tech and economic strength. The pig breeding improvement technology has entered a new stage. It is necessary to comprehensively use individual and relative phenotypic and genotypic information for individual genetic assessment on the basis of large-scale identification of individual genotypes; use of some fine individuals to achieve cross-field through artificial insemination Inter-field genetic linkages were established to achieve regional joint breeding of resources. There are two main forms: a large-scale breeder pig enterprise with conditions as a leading breeder breeding company, and a compact consortium formed by the small and medium-sized pig farmers covered from breeding, pig production, slaughtering and processing to sales; Small-scale pig farmers and enterprises urgently need intermediary service agencies with breeding technology as the core to provide all-round and timely services such as performance measurement, breeding pig assessment and selection, excellent boar semen, and production management, thereby forming a technology-based link. The loosely structured breeding complex.

Oxadiazon

1. Apperance: light yellow powder (TC)

2. Melting point: 87°C

3. Vapour pressure: <0.1mPa (20°C)

4. Solubility:In water 1mg/l  (20℃). In ethanol, methanol 100.in acetone, chloroform 1000 (all in g/l 20℃).

5. Stability: Stable on the normal temperature.

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