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An F2 cross bred to an F2 cross creates an F3 cross. Similarly, an F2 animal bred to an F1 animal creates an F2b backcross. F3 crosses and greater are called "multi-generational" crosses. [citation needed] In dog breeding, three generations of reliable documented breeding can be considered a "breed" rather than a crossbreed. [11]
Horses can breed with Przewalski's horse to produce fertile hybrids. Mule, a cross of female horse and a male donkey. Hinny, a cross between a female donkey and a male horse. Mules and hinnies are examples of reciprocal hybrids. Kunga, a cross between a donkey and a Syrian wild ass. Zebroids. Zeedonk or zonkey, a zebra/donkey cross. Zorse, a ...
Marie Jean Pierre Flourens attempted his own crossbreeding experiments nearly a century later, noting that first-generation matings between the two species tended to produce animals in which jackal characteristics were dominant, having straight ears, hanging tails, lack of barking, and wild temperaments. [2]
Many animal species have specific mating (or breeding) periods e.g. (seasonal breeding) so that offspring are born or hatch at an optimal time. In marine species with limited mobility and external fertilisation like corals , sea urchins and clams , the timing of the common spawning is the only externally visible form of sexual behaviour.
Animal breeding is a branch of animal science that addresses the evaluation (using best linear unbiased prediction and other methods) of the genetic value (estimated breeding value, EBV) of livestock. Selecting for breeding animals with superior EBV in growth rate, egg, meat, milk, or wool production, or with other desirable traits has ...
The breeding of wolf–dog crosses is controversial, with opponents purporting that it produces an animal unfit as a domestic pet. A number of wolfdog breeds are in development. The first generation crosses (one wolf parent, one dog parent) generally are backcrossed to domestic dogs to maintain a domestic temperament and consistent conformation.
Terminal crossbreeding is a breeding system used in animal production. It involves two (different) breeds of animal that have been crossbred.The female offspring of that cross is then mated with a male (the terminal male) of a third breed, producing the terminal crossbred animal.
A caraval is a cross between a male caracal (Caracal caracal) and a female serval (Leptailurus serval), while a male serval's and female caracal's offspring are called servicals. The first servicals were bred accidentally when the two animals were housed together at the Los Angeles Zoo. The offspring were tawny with pale spots.