Correction: Purity f100
What should be done to achieve 100/100 purity:
When can you say that your cow is 100% pure?
How many years do you have to wait to reach 100 purity for each breed?
The answer to the above questions follows a rule called the 50% rule, which means that 50% of the genetics is inherited from the father and 50% from the mother.
To better clarify the answers to the above questions, it is enough to consider that we have a purebred Holstein cow and we want to get from this cow to a purebred Simmental cow.
In my first Holstein cow pregnancy, I use Simmental cow sperm (sperm must be 100/100 from Simmental cows)
Our Holstein cow gives birth to a calf with 50% blood purity after 9 months. It is determined.
first generation
F1=50% Holstein 50% Simmental
We consider that our first generation calf is female and was impregnated with Simmental sperm at the age of 15 months (note that 100% Simmental sperm should always be used), at the age of 24 months the second generation calf is born with 75% purity.
second generation
F2 = Simmental 75% Holstein 25
Considering that the F2 calf is a female, our third generation will be born after 24 months with a purity of 87.5%.
The third generation
F3 = 12.5% Simmental 87.5% Holstein
Considering that the calves born are female, we move forward one generation every 2 years.
The fourth generation
F4 = 75.93% Holstein 6.25 Simmental
The fifth generation
F5 = 96.875 Holstein 3.125 Simmental
The sixth generation
F6=98.4374 Holstein 1.5626 Simmental
The seventh generation
F7=99.2 Holstein 0.8 Simmental
The eighth generation
F8=99.6 Holstein 0.4 Simmental
Ninth generation
F9=99.8 Holstein 0.2 Simmental
tenth generation
F10=99.9 Holstein 0.1 Simmental
The eleventh generation
F11=99.95 Holstein 0.05 Simmental
The twelfth generation
F12=99.975 Holstein 0.025 Simmental
13th generation
F13=99.982 Holstein 0.012 Simmental
The fourteenth generation
F14 = 99.9 Holstein 0.01 Simmental
We reach 99.99 purity after 14 generations
Including every 2 years, a generation takes 24 years, which is the time of a lifetime.
summary
F1=50%
F2=75%
F3=5.87%
F4=75.93%
F5=96/875
F6=98/4374
F7=2.99
F8=6.99
F9=8/99
F10 = 9.99
F11=99/95
F12=99/97
F13=99/98
F14=99/99
Tip
1- Due to the cost and time spent to obtain high-purity cows, do not crossbreed these animals.
2- The cows of the fifth generation F5 and after that are considered cows with high blood purity and have standard characteristics and are placed at the level of 100 purity.
This post is written by Sarhaniha