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Crossbreeding is the process of breeding offspring from different species, varieties, or regional populations to create new strains with beneficial traits. It is commonly used in agriculture to produce more abundant crops and livestock. Crossbreeding can also be used to produce stronger and larger pets, and to create plant hybrids that resist disease and increase yield. However, irresponsible crossbreeding can lead to weak offspring that dilutes the purebred population, and some crosses can produce harmful effects.
Crossbreeding is the process of producing offspring from parents that come from different species, varieties, or regional populations. Used to create new strains with traits beneficial to both parents, the offspring are often bred to have better vigor than either parent, along with a specific number of desired traits. While crossbreeding is primarily used in agriculture to produce more abundant crops and livestock, irresponsible crossbreeding can lead to weak offspring that dilutes the purebred population.
Most of the pets have been crossbred. While many may come from a mixed heritage which has resulted in animals whose parentage is unknown, farm cattle are carefully bred to ensure that the desired genetic traits are passed on in combination to the offspring. For example, cattle in particular have been bred for specific reasons such as increased milk production or increased beef production.
An immense variety of sheep species has been produced by crossbreeding, allowing individual farmers to achieve goals such as better coats for wool, larger sizes for meat, or better fertility. One of the oldest hybrid species in the world is that of the mule, offspring of a female horse and a donkey. Mules have been used as hard working animals for centuries and are said to be less willful and faster than a donkey and longer-lived and hardier than horses.
Just like animals, plants have also been subjected to interbreeding. Producing plant hybrids can help create a species that has greater resistance to disease and has an increased yield. Maize, in particular, has been the subject of a great deal of crossbreeding, with experts aiming for a species that is far better in terms of food production than any of its parent varieties. With the domestication process believed to have begun between 7,500 and 12,000 years ago, maize is today one of the most common and diverse crops used in modern agriculture with millions of tons produced each year.
Most crossbreeding is done for the benefit of the offspring and to satisfy human needs. Humans, for example, have produced larger and stronger livestock for food consumption; a multitude of species of hunting, guard and companion dogs; and millions of plant species that resist disease, populate gardens with beautiful flowers, and produce a wide variety of food sources. Some crosses in animals, however, have produced harmful effects as well as beneficial ones. Cattle used for milk production sometimes have high rates of cystitis due to constant and high milk production schedules. Racehorses can face death if they break a limb due to their modern physique, while dog species like Bulldogs and Pomeranians face breathing difficulties due to crossing for a shorter muzzle.
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