Economic hybrids use the heterosis between varieties to increase the production level and adaptability of mutton sheep.
Bayannaoer Merino sheep
Different breeds of male and female sheep are crossed. The hybrid generation has the advantages of strong viability, rapid growth and development, high feed utilization, and uniform product specifications. Therefore, in the production of commercial sheep, economic hybrids are generally used. In terms of meat production, using economic hybrids can increase production efficiency by 30%-50% and up to 75%.
Economic hybrids commonly used binary cross and backcross
Binary crossbreeding: The hybrid between two cultivars is a binary hybrid, and all offspring are used for commercial production. 100% of hybrid offspring will show heterosis. This kind of hybridization is simple and feasible, and it is suitable for a wide area where the technical level is backward and the herd feeding and management are extensive.
Backcross: The descendant of the binary cross is also called the hybrid generation. The representative symbol is F1. The F1 ewes are backcrossed to mate with any of the original rams; F1 rams can also be bred to the parent ewes. In order to use the heterosis of ewe fertility, purebred rams are often used for mating with hybrid ewes in actual production, but only 50% of the backcross offspring have acquired heterosis.
Bayannaoer Merino sheep
Different breeds of male and female sheep are crossed. The hybrid generation has the advantages of strong viability, rapid growth and development, high feed utilization, and uniform product specifications. Therefore, in the production of commercial sheep, economic hybrids are generally used. In terms of meat production, using economic hybrids can increase production efficiency by 30%-50% and up to 75%.
Economic hybrids commonly used binary cross and backcross
Binary crossbreeding: The hybrid between two cultivars is a binary hybrid, and all offspring are used for commercial production. 100% of hybrid offspring will show heterosis. This kind of hybridization is simple and feasible, and it is suitable for a wide area where the technical level is backward and the herd feeding and management are extensive.
Backcross: The descendant of the binary cross is also called the hybrid generation. The representative symbol is F1. The F1 ewes are backcrossed to mate with any of the original rams; F1 rams can also be bred to the parent ewes. In order to use the heterosis of ewe fertility, purebred rams are often used for mating with hybrid ewes in actual production, but only 50% of the backcross offspring have acquired heterosis.
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