over time when farmers save seed and practice selective breeding. Although landraces are often discussed once they have become endemic to a particular geographical region, landraces have always been moved over long and short distances. Some landraces can adapt to various environments, while others only thrive within specific conditions. Self-fertilizing and vegetatively populated species adapt by changing the frequencies of phenotypes. Outbreeding crops absorb new genotypes through intentional and unintentional hybridization, or through mutation. Cultivars developed from landraces Members of a landrace variety, selected for uniformity with regards to a unique feature over a period of time, can be developed into a farmers' variety or cultivar. Squash Peas Examples of plant landraces Beans Carrots Okra Physalis Rice Squash Peppers Tomatoes Wheat Animals Animal landrace development Some standardized animal breeds originate from attempts to make landraces more consistent through selective breeding, and a landrace may become a more formal breed with the creation of a breed registry or publication of a breed standard. In such a case, one may think of the landrace as a "stage" in breed development. However, in other cases, formalizing a landrace may result in the genetic resource of a landrace being lost through crossbreeding. While many landrace animals are associated with farming, other domestic animals have been put to use as modes of transportation, as companion animals, for sporting purposes, and for other non-farming uses, so their geographic distribution may differ. For example, horse landraces are less common because human use of them for transport has meant that they have moved with people more commonly and constantly than most other domestic animals, reducing the incidence of populations locally genetically isolated for extensive periods of time. Examples of animal landraces Cats Many standardized breeds have rather recently (within a century or less) been derived from landraces. Examples, often called natural breeds, include Arabian Mau, Egyptian Mau, Korat, Kurilian Bobtail, Maine Coon, Manx, Norwegian Forest Cat, Siberian, and Siamese. In some cases, such as the Turkish Angora and Turkish Van breeds and their possible derivation from the Van cat landrace, the relationships are not entirely clear. Cattle Dogs Dog landraces and the selectively bred dog breeds that follow breed standards vary widely depending on their origins and purpose. Landraces are distinguished from dog breeds which have breed standards, breed clubs and registries. Landrace dogs have more variety in their appearance than do standardized dog breeds. An example of