By Al Walker, ARF Genealogist & Registrar
For
the breeder, the Y-Dominate has the most desirable traits –
temperament, structure, working qualities, etc. Since Z-Dominate has been
crossed into the breeding program, Z-Dominate must also enhance the
breeding qualities you are seeking. [For further breeding development, see
ARF’s “Clock-Wise Breeding Chart”.]
5-GENERATION
EXSAMPLE, CALCULATING OFFSPRING PERCENTAGES,
TRANSITIONING A
Y + Z ANIMAL TO
A
BASIC Y-DOMINATE ANIMAL
Notice: On
an ARF 5-Generation Extended Pedigree, all animals on the pedigree are Y-Dominate
animals, except for an out-cross of a Z-Dominate
animal. However, for the breeder to bring his Y+Z related animals
back into line with his Y-Dominate animals, the 1st generation
of offspring, Y+Z, must continue to move forward towards the next
generation, Y+Z constantly being bred back to a Y-Dominate
animal. Therefore, when the 5th generation of Y+Z offspring
is bred back to a Y-Dominate, it is their offspring that retain 98+% of
the Y-Dominate’s genes and 1+% of Z-Dominate’s genes; it is at
this point of transition that the Foundation re-classifies the 6th
generation as being Y-Dominate.
Y-Dominate
X
1st Generation of Offspring = 50% Y + 50% Z
Z-Dominate
1/2 1/2
Y-Dominate
X
2nd Generation of Offspring = 75% Y + 25% Z
50%
Y + 50% Z
3/4
1/4
Y-Dominate
X
3rd
Generation of Offspring = 87.5% Y + 12.5% Z
75%
Y + 25% Z
7/8
1/8
Y-Dominate
X
4th Generation of Offspring = 93.75% Y + 6.25% Z
87.5%
Y + 12.5% Z
15/16
1/16
Y-Dominate
X
5th Generation of Offspring = 96.875% Y + 3.125% Z
93.75%
Y + 6.25% Z
31/32
1/32
The
5th Generation of Y+Z Offspring, being bred back to a Y-Dominate
animal, produces animals with as much as 98+% of
the Y-Dominate, thereby realigning their offspring to Y-Dominate
animals once again.
Y-Dominate
X
6th Generation of Offspring = 98.3475% Y + 1.6525% Z
96.875%
Y + 3.125% Z
63/64
1/64
NOTICE TO ALL BREEDERS: When
animals are born, it is not unusual to find offspring carrying a recessive gene;
therefore, it is up to you, the breeder, to weed out those animals that do not
conform to their breed standard. [To weed out means to neuter, spay, or humanely
put down.]
ARF /
Common Law Copyright