Breeding method of a Chinese meat-use multiple-birth Merino sheep strain

Abstract

The invention discloses a method for cultivating a novel Chinese polyembryony mutton Merino strain. The method for cultivating the novel Chinese polyembryony mutton Merino strain includes performing hybridization on Chinese fine-wool ewes and Booroola Merino rams to obtain a Chinese X Booroola hybridization generation F1; selecting excellent rams and ewes in the Chinese X Booroola hybridization generation F1 to perform fixed cross breeding on the excellent rams and ewes to obtain a Chinese X Booroola cross breeding generation F1; performing hybridization on Chinese fine-wool ewes and South African mutton Merino rams to obtain a Chinese X Sound African hybridization generation F1; selecting excellent ewes in the Chinese X Sound African hybridization generation F1 and performing hybridization on the selected excellent ewes in the Chinese X Sound African hybridization generation F1 and South African mutton Merino rams to obtain a Chinese X Sound African hybridization generation F2; respectively performing hybridization on excellent rams and ewes in the Chinese X Booroola cross breeding generation F1 and excellent rams and ewes in the Chinese X South African cross breeding generation F2 to obtain a Chinese X South African X Booroola hybridization generation F1; selecting excellent rams and ewes, which carry a B+ genotype, in the Chinese X South African X Booroola hybridization generation F1 to perform fixed cross breeding on the Chinese X South African X Booroola hybridization generation F1 to obtain a Chinese X South African X Booroola cross breeding generation F1 so as to finally obtain the novel Chinese polyembryony mutton Merino strain.

Description

technical field [0001] The present invention relates to a kind of animal breeding technique, specifically the present invention relates to the breeding method of Chinese meat multi-fetal Merino sheep strain. Background technique [0002] Merino sheep for multi-parity meat is the only breed of fine-wool sheep with high fecundity that can provide high-quality wool and mutton at the same time. It is committed to the localization of Merino sheep for multi-parity meat. It can not only stabilize the production of high-quality fine wool, save foreign exchange, and effectively protect my country's The supply of raw materials for wool spinning processing enterprises can also promote the production of mutton, which will help alleviate the high price and tight supply of mutton, and fully meet the development needs of domestic fine-wool sheep. The approximately 30 million fine-wool sheep currently owned by our country are basically based on the 10 fine-wool sheep breeds cultivated by ou...

AI Technical Summary

Problems solved by technology

However, so far, there is still no new breed of Merino sheep with independent intellectual property rights that can be completely localized and can replace foreign Merino sheep for multiple births.

[0003]South African Meat Merino is a meaty and wooly breed with good quality wool (wool fiber diameter 19.1~21.0 μm, hair length 8.0cm, adult female Sheep shearing amount 4-4.5 kg, adult ewe weight 75-80 kg) and high feed conversion ratio (3.91:1) production capacity, which meet the current requirements for the quality of merino wool and mutton for meat in my country, but the reproduction rate is relatively low. Low (150%), and the genetic mechanism of multiple births is still unclear, so it is difficult to use conventional breeding techniques to select and fix

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