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Η yasmin1gr αυτή τη στιγμή δεν είναι συνδεδεμένη. Είναι μας γράφει από Θεσσαλονίκη (Θεσσαλονίκη). Έχει γράψει 6.478 μηνύματα.
08-05-07
02:40
Μερικα λινκς για το αν οι ράτσες εγιναν και πως
https://www.messybeast.com/retro-genetics.htm
https://pawpeds.com/pawacademy/genetics/
The feline genome was mapped at the start of the 21st century. Genetic modification (GM) has been performed in laboratory rodents and there are hopes at producing non-allergenic GM cats. Genes from other species could be added to feline embryos, for example the gene for luminescence from a jellyfish. Cats have been cloned and, in theory, a neutered or infertile cat that goes on to become an outstanding prize-winner can now pass on its genes via cloning. Several mechanisms that can cause the elusive tortie male have been identified.
On the other hand, genetics has led to a schism between "genotype" breeders (the cats must be purebred for certain genes) and "phenotype" breeders (the cat must look the part even if it carries genes from an outcross). Better knowledge of genetics and strong selective breeding has led to "hyper-types" or "ultra-types" whose traits have been taken to such extremes that some no longer really look like cats. In response, some breeders have "traditional style" or "old style" versions of the breed in parallel to the showbench ultratype.
Legislators became involved in cat breeding in 1995 when they drafted the "European Convention for the Protection of Pet Animals". While ultra-typing continues unabated in America, there is European legislation against American-style "hypertypes". If enforced as law in the member states of the Council of Europe, ultra-typed Persians/Exotics (brachycephaly and brachygnathia), Manxes (spinal column defects), Bobtails (fused tail vertebrae), Scottish Folds (folded ears and skeletal defects), Sphynxes (hairlessness), Rexes (defective tactile hairs), Munchkins (a form of dwarfism) and their derivatives would all be banned as "abnormal" or "genetically defective". If the breeders do not amend their own breeding practices or where the characteristic could not be eliminated, the law would cause affected breeds to be "phased out". Blue-eyed white cats in any breed would also be affected due to issues of deafness and only bluee-eyed cats with certified good hearing could be bred. Polydactyl cats would also be banned under the misconception that the gene was semi-lethal (possibly confusing it with radial hypoplasia which can also cause a form of polydactyly).
Good knowledge of scientific breeding - genetics - would allow some of these traits to be eliminated and the ultra-type trend could certainly be reversed. Having come from a state of no genetic knowledge to one of good genetic knowledge, the future of scientific cat breeding may have as much to do with lawmakers and laboratory scientists as with selective breeding by cat fanciers.
Γάτες που δέν υπαρχουν πια σαν ρατσες
https://www.messybeast.com/retro-lost.htm
https://www.messybeast.com/retro-genetics.htm
https://pawpeds.com/pawacademy/genetics/
The feline genome was mapped at the start of the 21st century. Genetic modification (GM) has been performed in laboratory rodents and there are hopes at producing non-allergenic GM cats. Genes from other species could be added to feline embryos, for example the gene for luminescence from a jellyfish. Cats have been cloned and, in theory, a neutered or infertile cat that goes on to become an outstanding prize-winner can now pass on its genes via cloning. Several mechanisms that can cause the elusive tortie male have been identified.
On the other hand, genetics has led to a schism between "genotype" breeders (the cats must be purebred for certain genes) and "phenotype" breeders (the cat must look the part even if it carries genes from an outcross). Better knowledge of genetics and strong selective breeding has led to "hyper-types" or "ultra-types" whose traits have been taken to such extremes that some no longer really look like cats. In response, some breeders have "traditional style" or "old style" versions of the breed in parallel to the showbench ultratype.
Legislators became involved in cat breeding in 1995 when they drafted the "European Convention for the Protection of Pet Animals". While ultra-typing continues unabated in America, there is European legislation against American-style "hypertypes". If enforced as law in the member states of the Council of Europe, ultra-typed Persians/Exotics (brachycephaly and brachygnathia), Manxes (spinal column defects), Bobtails (fused tail vertebrae), Scottish Folds (folded ears and skeletal defects), Sphynxes (hairlessness), Rexes (defective tactile hairs), Munchkins (a form of dwarfism) and their derivatives would all be banned as "abnormal" or "genetically defective". If the breeders do not amend their own breeding practices or where the characteristic could not be eliminated, the law would cause affected breeds to be "phased out". Blue-eyed white cats in any breed would also be affected due to issues of deafness and only bluee-eyed cats with certified good hearing could be bred. Polydactyl cats would also be banned under the misconception that the gene was semi-lethal (possibly confusing it with radial hypoplasia which can also cause a form of polydactyly).
Good knowledge of scientific breeding - genetics - would allow some of these traits to be eliminated and the ultra-type trend could certainly be reversed. Having come from a state of no genetic knowledge to one of good genetic knowledge, the future of scientific cat breeding may have as much to do with lawmakers and laboratory scientists as with selective breeding by cat fanciers.
Γάτες που δέν υπαρχουν πια σαν ρατσες
https://www.messybeast.com/retro-lost.htm
Σημείωση: Το μήνυμα αυτό γράφτηκε 18 χρόνια πριν. Ο συντάκτης του πιθανόν να έχει αλλάξει απόψεις έκτοτε.
