artificial selection


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Related to artificial selection: Directional selection

ar·ti·fi·cial se·lec·tion

interference by humans with natural selection by purposeful breeding of animals or plants of specific genotype or phenotype to produce a strain with desired characteristics; for example, breeding of dairy cattle for high milk production.

artificial selection

n.
Human intervention in animal or plant reproduction or survival to allow only individuals with desirable traits to reproduce.

ar·ti·fi·cial se·lec·tion

(ahr'ti-fish'ăl sĕ-lek'shŭn)
Interference with natural selection by purposeful breeding of animals or plants of specific genotype or phenotype to produce a strain with desired characteristics.

artificial selection

a SELECTION process in which man chooses particular organisms from which to breed, based upon their PHENOTYPE, so aiming to alter the average GENOTYPE and phenotype of the resulting progeny (a form of DIRECTIONAL SELECTION). This process is carried out by plant and animal breeders whose job is to enhance certain features of the organisms with which they work, e.g. greater resistance to root rot in tomatoes, or higher milk yield in cattle. Such selection depends upon the presence of GENETIC VARIABILITY in the chosen population. See also HERITABILITY.
References in periodicals archive ?
Therefore, we believe that nsSNPs had a diverse evolutionary history during the domestication and artificial selection processes, and advanced studies are required to achieve an accurate interpretation of the Landrace genome using nsSNP information after exploring Landrace positive selection based on whole-genome sequence data.
Qiu et al., "Natural variation and artificial selection in four genes determine grain shape in rice," The New Phytologist, vol.
Collect the best individual of various populations to form an elite population through immigration artificial selection operation (realize best individual with the optimal weights and thresholds of the network).
Our results suggested that (1) the interspecific isometric relationship between roots and shoots is constant even in a small data set of seedlings, (2) artificial selection in crop species has not changed this uniform relationship, and (3) the scaling exponent of MB vs.
While selective breeding or artificial selection has been remarkably successful at growing outsize tomatoes and pumpkins, and impressive cattle and pigs, its success with wild fish, even in small waters, has been limited.
Paradoxically, environmental selection may, in many instances, have been stronger than artificial selection. Early herds were vulnerable to disease, droughts and storms, disasters that would have forced pastoralists to replenish herds from wild populations better adapted to harsh local conditions.
As English adapts its way through a sea of localized users, this English would then be subjected to further adaptation and customization - all part of the artificial selection process.
Specifically, there was analyzed population structure and changes in a range of body development parameters with the aim of providing information to support artificial selection, conservation and possible population expansion of Gyr breed in northeast Brazil.
This is an artificial selection of territory that excludes some groups and relationships from her analysis, as she does acknowledge, but the author nonetheless captures intellectual change among peoples seldom studied for this purpose.
While it is true that domesticated animals and plants arise from artificial selection, the process by which certain genes are favored and gradually increase in frequency is, according to the authors, "the essence of evolutionary change." From a genetic point of view, there exists no important distinction between natural and artificial selection.
Several basic protocols for the healthy maintenance of these populations have been developed, including re-establishing the lineage through relaxed-rearing, artificial selection of more resistant lineages, hybridization of compatible lineages, and supplying the colony with wild individuals (Leppla 1989, Zucoloto 2000).
He supports this thesis by invoking various types of direct evidence, e.g., the power of natural and artificial selection to produce changes in diverse populations of organisms, and various types of indirect evidence, e.g., findings from paleontology, biogeography, embryology and other biological disciplines.