Zur Hundegenetik gibt es einiges an Literatur und ja, ich bleibe dabei, dass Heterosiseffekte beim kreuzen reiner lLinien zu erwarten sind.
Ich zitiere nur mal aus dem ersten der unten genannten paper:
We chose 10 representative breeds and analyzed their pedigrees since electronic records were established around 1970, corresponding to about eight generations before present. We find extremely inbred dogs in each breed except the greyhound and estimate an inbreeding effective population size between 40 and 80 for all but 2 breeds. For all but 3 breeds, >90% of unique genetic variants are lost over six generations, indicating a dramatic effect of breeding patterns on genetic diversity.
Hier nur in Kürze (keine Zeit) ein paar Tipps für Interessierte:
CALBOLI, F.C.F., SAMPSON, J., FRETWELL, N. and BALDING, D.J., 2008. Population structure and inbreeding from pedigree analysis of purebred dogs. Genetics, 179(1), pp. 593-601.
COLLINS, L.M., ASHER, L., SUMMERS, J. and MCGREEVY, P., 2011. Getting priorities straight: Risk assessment and decision-making in the improvement of inherited disorders in pedigree dogs. Veterinary Journal, 189(2), pp. 147-154.
BELL, J.S., 2011. Researcher responsibilities and genetic counseling for pure-bred dog populations. Veterinary Journal, 189(2), pp. 234-235.
NICHOLAS, F.W. and WADE, C.M., 2011. Canine genetics: A very Special Issue. Veterinary Journal, 189(2), pp. 123-125.
WADE, C.M., 2011. Inbreeding and genetic diversity in dogs: Results from DNA analysis. Veterinary Journal, 189(2), pp. 183-188.
JAMES, J.W., 2011. Is gene loss in pedigree dogs surprisingly rapid? Veterinary Journal, 189(2), pp. 211-213.
Viele Grüße
Ingo