Line Breeding

[tinytiger 840]

Interesting thread this. Nature inbreeds all the time: look at the Galapagos Islands: cut off from any possibility of breeding to non related animals/birds. The defective ones don't survive to breed, so you end up with a super clean gene pool with no faults. It is the human element that causes problems, as Dan says, when the need to cull hard is not carried out religiously and thoroughly.

Did you see the state of the dogs that ended up there(released to kill feral goats a few hundred years ago)-think they were all poisoned eventually.

[tinytiger 840]

line breeding vs inbreeding (pigs but the principle is the same)http://www.compusire.com/linebreedinbreed.html

im very dubious of programs like compusires,true-nicks etc,,trying to dazzle people with bullshit science and take their money.computer cant tell which side of the pedigree foal,pup,chick is after throwing to.

 

( The crystallizing effects of these ancestors, however, can be ameliorated by generational distance, which increases the likelihood that the contributions of these ancestors will become vulnerable to variation resulting from the successive crosses through which they descend. Consequently, the quality of runners inbred to such ancestors tends to improve as those ancestors become more generationally distant and the debilitating effects become more innocuous." )hmmmm-basically when the shitebag stallions become very distant in a pedigree-performance improves...heres a simpler recipe for success-breed a winning mare to gallileo

Edited November 3, 2013 by tinytiger

[tinytiger 840]

 

 

The biggest problem with breeding this close is that any genetic faults that the dog/bitch are carrying (recessive genes)once doubled up due to inbreeding can/will come to the surface,if you go down this route be prepared to cull hard.....I have done a father /daughter mating with no apparent problems,still see some of the pups(5 yrs old now)all seems well,but to be totally honest I wouldn't breed this close again

Spot on ! but if you are "Line breeding" or "in breeding" any genetic faults that come to the surface are not a problem as that is the point to -:

 

1) bring the good traits to the surface and retain them, or 2) bring the bad traits to the surface and eliminate them,

 

and as you rightly say be prepared to cull hard.

 

Here's a copy of a renowned breeders pedigree plan ... select your stud sire male (A) ..the one your trying to replicate or at least retain as many of his good traits as possible now obtain the best 2 proven producer females B and C Right here we go -:

mate A to B and keep a daughter (D) then also mate A to D and keep a son (E) now (still following) mate A to C and keep a daughter (F) and then also mate A to F and keep a daughter (G) now finally mate E to G producing H the owner of the pedigree, i will try and lay it out in normal pedigree format

A

E A

D

B

H

A

 

G A

F

C

 

hope it makes sense the male always on top of a pairing ... so this complete pedigree "line bred" to A. and if you do the maths H is 75% of A so should have inherited a good percentage of the desired traits ! interesting subject .

 

was it a renowned breeder of pigeons by any chance?-interesting -thanks for posting it....(Both parents of "H" are double bred off "A" but from different damlines-am i reading you right?)

Edited November 3, 2013 by tinytiger

[darencross 72]

What about half brother to half sister then half sister to half brother then use a uncle or auntie to the pups just a question lads

[South hams hunter 8,922]

The biggest problem with anything like this is and as was said who would actually cull and cull hard? To many people breed these litters and dont cull the waste and its not just at 2 days its at 2 years aswell. The pups are born and appear healthy but dont make the grade, these should be culled but very rarely are.

[jeemes 4,484]

The biggest problem with anything like this is and as was said who would actually cull and cull hard? To many people breed these litters and dont cull the waste and its not just at 2 days its at 2 years aswell. The pups are born and appear healthy but dont make the grade, these should be culled but very rarely are.

they are in my kennel,but you are right.They usually get sold on but the important thing is they dont get bred from.