GB/T 35569-2017Code of practice of progeny test for Chinese Holstein bulls (English PDF)

3.1 Descendants measured progenytest

According to the bull performance measurement records of the offspring, body identification score and reproductive, health, longevity and other functional traits data, using special

The statistical analysis method is used to estimate the breeding value of each trait and use it as a basis to calculate the selection index and evaluate the technical process of the value of the bull.

3.2 Plan matching planedmating

According to the breeding target, we select the bull and the cow with the best comprehensive genetic quality to plan the breeding, and obtain the excellent blood lineage and the genetic basis

The method of public calves.

3.3 Genomic selection genomic selection; GS

Genetic marker-assisted selection of important economic traits with genome-wide genetic marker information.

3.4 Senate bulls testingbul

Through the program matching and other ways to obtain, through the genomic selection potential calving value of public calves, growth and development to sexual maturity, with

Semen production capacity, and body appearance in line with the species standard, can participate in descent determination.

3.5 Try frozen sperm

Senate bulls frozen semen.

3.6 Descendants measured progenytestingfarm dairy farm

Bear the determination of the bull measured dairy cattle field.