| naturaldane |
| Posted 3/25/2008 9:56:53 AM |
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Active: 08-13-2006
Posts: 3012
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Ok, theres way to much going on with issues with line breeding for me not to post the laws as they help explain the whole purpose.
BACK CROSSING;
another type of inbreeding which we equate, to the greatest extent, to the stud dog. In back crossing the breeder selects a stud with as few imperfections as possible and of magnificent type, who potently produces excellent progeny.
Basically what the breeder hopes to accomplish is to infuse the entire breeding line with the genetic qualities of the excellent stud. a good bitch who will correct any of the slight failings the male may have , is bred to him and from the ensuing litter the best FEMALE puppy that in appearance is MOST like the sire is selected , kept & and the proper time bred back to the sire . it is generally advised to keep 2 females in case something drastic occurs that eliminated one of the bitches. the second choice bitch then can be used - again after the bitch is whelped the best bitch puppy that mirrors the sires excellence is saved and bred back to her sire when she reaches maturity, this form of incest is continued again & again until a time arrives when the alpha male can no longer reproduce or until physical or psychological debilities become apparent (IF they do) that make it inexpedient to con tine the experiment.
If seems to have acquired much of his virtues from HIS dam, then the initial breeding should be to HER, if the stud dogs sire seems to have lent his most of his fine traits , then the first breeding should be , if possible,and if she fits the breeders needs - to the SISTER of the males SIRE. BY back crossing the genetic worth is consolidated and the germplasm fashioned to a wanted mold. This conformation that you have wright by back crossing will continue to prevail for several generations after the alpha male can no longer produce, if breeding continues within the confines of the line bred family.
cont
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| naturaldane |
| Posted 3/25/2008 10:34:52 AM |
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Active: 08-13-2006
Posts: 3012
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OUT CROSSING;
This breeding technique can be considered a counter measure to any kind of line breeding or inbreeding - out cross means that for at LEAST 5 or 6 generations there has been no common ancestry, that no individual app rears more than once in a pedigree.
The only control a breeder can have over a the prodengy of an out cross breeding is if one of the mated pair IS line bred OR inbred, the other partner should be dominant in any needed type or temperament compeations. out cross breeding's generally brings greater vigor and new and needed characteristics to a strain, and usually a lack of prepotency and uniformity in the progeny. It`will help cover up recesses that may be detrimental to the stockthestatement regarding prepotency and uniformity in the progeny doesn't not always follow.
animals of out cross breeding frequently ( not always) indicate a LOWER breeding worth because favorable genetic factors have not been clustered and inheritable material has been dispersed.
perhaps the most important improvement that an out cross breeding can bring to the kennel is its ability to return vitality virility and vigor BACK to a line that may have been weakened due to close breeding's .
Abnormalities congenital ills and abnormalities that have been brought to the surface by line breeding or inbreeding can be arrested corrected or terminated .
BACK MASSING
the aggregation of genetic factors of a specific dog, his name appearing numerous times in the extended generations of a pedigree. the first 3 generations of a pedigree are generally the most important, influencing the progeny to a greater extent than later generations. But when those initial generations indicate no close breeding, allowing various genetic factors to consolidate and affect the young, then the influence of the back massed animal will be felt.
back massing can bring merit as well as flaws to a bloodline, but we can only be cognizant of the cause if we search further back in the animals history.
** also used in breeding is
HETEROSIS ( utilized MOSTLY in agricutual fields and in experimental work with fowl & swine.
it is considered it could become a genetic tool to use in Dog breeding if it has a meritorious application.
* years ago my father told me an ASIAN PROVERB when he was teaching me about breeding ...
" the restless see today - the patient see eternity"
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| arachyd |
| Posted 3/26/2008 10:41:06 PM |
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Active: 05-09-2007
Posts: 178
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 good info! |
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