Abstract:

The production traits and its corresponding selection traits in breeding objective for breeding scheme were determined by the method of using total breeding value as the quantitative breeding objectives. When the breeding objectives were determined in Sika Deer, besides the velvet traits were mainly considered, the reproduction and service life traits should be considered properly, and the secondary traits which directly affecting velvet deer farming profits could not be neglected too. The formulas for calculating the marginal profits of the traits in breeding objectives for velvet Sika Deer had been deduced by the difference method. Biological, genetic and breeding parameters and economic values of Sika Deer had been investigated, and the marginal profits for traits in determining the breeding objective of the population were also calculated. When these parameters or values were changed, the marginal profits for traits could be calculated again by the given formulas. The economic importance of velvet, reproduction and service life traits in Sika Deer breeding were nearly in the proportion of 8∶3∶1. In the objective traits, velvet traits in Changbaishan Sika Deer and reproduction traits in Xifeng Sika Deer should be taken seriously.

Key words: Sika Deer, breeding objective, marginal profit, breeding scheme