Pros & Cons of Breeding Methods

Pros and Cons of Breeding Methods

 

Inbreeding (mating of closely related individuals)

        Pro

  • Produces uniform or predictable offspring.
  • Hidden (recessive) genes show up and can be eliminated.
  • Individuals will “breed true” and are “pure”.
  • Doubles up the good genes
  • Eliminates unwanted traits.

         Con

  • Doubles up on faults and weakness
  • Progressive loss of vigor and immune response
  • Increased reproductive failures, fewer offspring
  • Emphasis on appearance means accidental loss of the good genes for other attributes
  • Genetically impoverished individuals

 

Line-Breeding (mating of less closely related individuals)

       Pro

  • Avoids inbreeding very closely related Roller pigeons, but the Rollers are still pure
  • Produces uniform or predictable offspring
  • Slows genetic impoverishment.

        Con

  • Requires excellent high value breeders
  • Does not halt genetic impoverishment, just slows it down

 

Outcrossing (mating unrelated individuals within the same breed)

        Pro

  • Brings in new qualities or reintroduces lost qualities
  • Increases vigor
  • Still pure Rollers

        Con

  • Less consistency and predictability of offspring
  • May have to breed out unwanted genes accidently introduced.
  • May be difficult to find individuals which are true outcrosses
  • May take years to get consistent offspring
  • Produces many variants not suitable for use in the breeding program.