genetic variability

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Related to genetic variability: Genetic diversity, heritability

genetic variability

1. The range of minor alterations present in a genome, such as the number of diverse alleles of a specific gene that are found as a result of small mutations in the DNA of a species.

2. The expression of those diverse genes in living organisms and their impact on health or disease.

genetic variability

a range of phenotypes for a particular CHARACTER produced by alternative alleles of one or more genes, the range containing discrete groups (see QUALITATIVE INHERITANCE or a continuous spectrum of types (see POLYGENIC INHERITANCE). Genetic variability arises initially by MUTATION and is maintained by sexual reproduction involving CROSSING OVER in MEIOSIS. Such variation is the raw material for NATURAL SELECTION to act upon, ensuring that the best-adapted variants are most likely to reproduce.

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References in periodicals archive ?

Genetic variability induced by chemical and physical mutagenic agents in oat genotypes.

Induced polygenic variability for quantitative traits in chickpea var. Pusa-372/Variabilidade poligenica induzida para caracteristicas quantitativas em grao de bico var. Pusa-372

[34.] Lakshmana D and AK Guggari Genetic variability studies in foxtail millet.

Genetic variability and heritability of grain yield components and grain mineral concentration in India's Pearl millet (Pennisetum glaucum (L) R. Br.) accessions

To estimate the genetic variability in the populations the bandsharing frequency (BSF) was used, whose formula is: BS = 2Nxy/(Nx + Ny), where Nxy corresponds to the number of bands shared by the two populations (Nx and Ny to the bands that appears in the x and y populations, respectively) (10).

Analisis de dos poblaciones de caninos (Canis familiaris) de la raza Cimarron Uruguayo utilizando rapds como marcadores moleculares

Measuring and managing genetic variability in small populations.

Diversidad genetica de la raza Criollo Limonero utilizando marcadores de adn microsatelites

The clusters obtained with the genotypes from the C0, C1 and C2 cycles were used to evaluate the effects of recurrent selection on populations genetic variability by comparing the mean distances obtained by Jaccard's Index arithmetical complements.

Effect of recurrent selection on the genetic variability of the UNB-2U popcorn population using RAPD markers/ Efeito da selecao recorrente na populacao UNB-2U de milho pipoca por marcadores RAPD

Pamela Soltis ** of Washington State University, designed a protocol to examine the genetic variability of the species and the potential hybrid contamination of the ex situ populations.

Cultivating partnerships for the yellow larkspur

"Pureblooded" Florida panthers often suffer from heart and reproductive system defects, the result of decades of inbreeding, leading some scientists to maintain that the best way to preserve the subspecies is to hybridize them with Western cougars, enhancing the breed's genetic variability.

The call of the wild: the endangered panther struggles for survival in Florida's wilderness. (Out There)

It emphasizes the need for research on genetic variability, in immune system development and encourages a more flexible schedule for a reduction in the number of vaccines administered at one time.

Vaccinations: searching for the middle ground

Fitness the ability to tope with prevailing environmental conditions, and depends on the retention of sufficient genetic variability avoid inbreeding depression and genetic drift over the short- to mid-term (decades Adaptability is necessary for the long-term persistence of a population and involves the ability to evolve.

Application of population viability theory to moose in mainland Nova Scotia

The phenomenon suggests a genetic variability in the population.

Genetics and Aging

stylirostris, a more coastal species, showed a north-south clinelike pattern in its genetic variability parameters: [P.sub.95] from 15.63% to 31.25% and [H.sub.e] from 0.038 to 0.086.

Genetic structure of two commercial penaeids (Penaeus californiensis and P. stylirostris) from the Gulf of California, as revealed by allozyme variation

This genetic variability may account for our findings."

Lung from caucasian donor increases survival rate in blacks and whites, study finds