All Topics  
Introgression

 

 
   Email Print
   Bookmark   Link
 

 

Introgression
 
 
  Topics Introgression Topic Home

Introgression, in genetics
Genetics

Genetics , a discipline of biology, is the science of heredity and Genetic variation in living organisms. The fact that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding....
 (particularly plant genetics), is the movement of a gene
Gene

A gene is the basic unit of heredity in a living organism. All living things depend on genes. Genes hold the information to build and maintain their cell and pass genetic trait to offspring....
 (gene flow
Gene flow

In population genetics, gene flow is the transfer of alleles of genes from one population to another.Migration into or out of a population may be responsible for a marked change in allele frequencies ....
) from one species into the gene pool of another by backcrossing an interspecific hybrid with one of its parents. Introgression is a long-term process; it may take many hybrid generations before the backcrossing occurs. An example of introgression is that of a transgene
Transgene

A transgene is a gene or Genetics material that has been transferred naturally or by any of a number of genetic engineering techniques from one organism to another....
 from a transgenic plant
Transgenic plant

Transgenic plants possess a gene or genes that have been transferred from a different species. Although DNA of another species can be integrated in a plant genome by natural processes, the term "transgenic plants" refers to plants created in a laboratory using recombinant DNA technology....
 to a wild relative as the result of a successful hybridization leading to intentional or unintentional "genetic pollution
Genetic pollution

Genetic pollution is undesirable gene flow into wild populations. The term is usually associated with the gene flow from a Genetic engineering organism to a non GE organism; however, conservation biology and conservationists are using it to describe gene flow from a Domestication, feral, Introduced species or invasive species to a Wildlife...
".






Discussion
Ask a question about 'Introgression'
Start a new discussion about 'Introgression'
Answer questions from other users
Full Discussion Forum



Encyclopedia


Introgression, in genetics
Genetics

Genetics , a discipline of biology, is the science of heredity and Genetic variation in living organisms. The fact that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding....
 (particularly plant genetics), is the movement of a gene
Gene

A gene is the basic unit of heredity in a living organism. All living things depend on genes. Genes hold the information to build and maintain their cell and pass genetic trait to offspring....
 (gene flow
Gene flow

In population genetics, gene flow is the transfer of alleles of genes from one population to another.Migration into or out of a population may be responsible for a marked change in allele frequencies ....
) from one species into the gene pool of another by backcrossing an interspecific hybrid with one of its parents. Introgression is a long-term process; it may take many hybrid generations before the backcrossing occurs. An example of introgression is that of a transgene
Transgene

A transgene is a gene or Genetics material that has been transferred naturally or by any of a number of genetic engineering techniques from one organism to another....
 from a transgenic plant
Transgenic plant

Transgenic plants possess a gene or genes that have been transferred from a different species. Although DNA of another species can be integrated in a plant genome by natural processes, the term "transgenic plants" refers to plants created in a laboratory using recombinant DNA technology....
 to a wild relative as the result of a successful hybridization leading to intentional or unintentional "genetic pollution
Genetic pollution

Genetic pollution is undesirable gene flow into wild populations. The term is usually associated with the gene flow from a Genetic engineering organism to a non GE organism; however, conservation biology and conservationists are using it to describe gene flow from a Domestication, feral, Introduced species or invasive species to a Wildlife...
". Another important example has been studied by Arnold & Bennett 1993: irises
Iris (plant)

Iris is a genus of between 200-300 species of flowering plants with showy flowers. It takes its name from the Greek word for a rainbow, referring to the wide variety of flower colors found among the many species....
 species from southern Louisiana
Louisiana

The State of Louisiana is a U.S. state located in the U.S. Southern States of the United States of America. Its capital is Baton Rouge and largest city is New Orleans....
.

There is evidence that the introgression is a ubiquitous phenomenon in plants, even in animals and perhaps it also exists among pre-human lineages (Holliday 2003).

An introgression line (abbreviation: IL) in plant
Plant

Plants are Life organisms belonging to the Kingdom Plantae. They include familiar organisms such as trees, herbs, bushes, grasses, vines, ferns, mosses, and green algae....
 molecular biology
Molecular biology

Molecular biology is the study of biology at a molecule level. The field overlaps with other areas of biology and chemistry, particularly genetics and biochemistry....
 is a line of a crop
Agriculture

Agriculture refers to the production of food and goods through farming and forestry. Agriculture was the key development that led to the rise of civilization, with the animal husbandry of domestication animals and plants creating food surpluses that enabled the development of more Population density and Social stratification societies....
 species that contains genetic material derived from a similar species, for example a "wild" relative. An example of a collection of ILs (called IL-Library) is the use of chromosome
Chromosome

A chromosome is an organized structure of DNA and protein that is found in Cell . A chromosome is a single piece of DNA that contains many genes, regulatory sequence and other genetic sequence....
 fragments from Solanum pennellii (a wild variety of tomato
Tomato

The Tomato is an herbaceous, usually sprawling plant in the Solanaceae or nightshade family, as are its close cousins Nicotiana, potatoes, aubergine , chilli peppers, and the poisonous Atropa belladonna....
) introgressed in Solanum lycopersicum (the cultivated tomato). The lines of an IL-Library covers usually the complete genome
Genome

In classical genetics, the genome of a diploid organism including eukarya refers to a full set of chromosomes or genes in a gamete; thereby, a regular somatic cell contains two full sets of genomes....
 of the donor. Introgression lines allow the study of quantitative trait loci, but also the creation of new varieties by introducing exotic traits.

See also


  • Gene flow
    Gene flow

    In population genetics, gene flow is the transfer of alleles of genes from one population to another.Migration into or out of a population may be responsible for a marked change in allele frequencies ....
  • Transgene
    Transgene

    A transgene is a gene or Genetics material that has been transferred naturally or by any of a number of genetic engineering techniques from one organism to another....
  • Hybridization
  • Genetic engineering
    Genetic engineering

    Engineering There are a number of ways through which genetic engineering is accomplished. Essentially, the process has five main steps# Isolation of the genes of interest...
  • Genetically modified organism
    Genetically modified organism

    File:GloFish.jpgA genetically modified organism or genetically engineered organism is an organism whose genetic material has been altered using genetic engineering techniques....
  • Transgenic plant
    Transgenic plant

    Transgenic plants possess a gene or genes that have been transferred from a different species. Although DNA of another species can be integrated in a plant genome by natural processes, the term "transgenic plants" refers to plants created in a laboratory using recombinant DNA technology....
  • Chimera (genetics)
    Chimera (genetics)

    Typically seen in zoology , a chimera is an animal that has two or more different populations of genetically distinct cell that originated in different zygotes; if the different cells emerged from the same zygote, it is called a mosaicism....
  • Gene pool
    Gene pool

    In population genetics, a gene pool is the complete set of unique alleles in a species or population....
  • Genetic pollution
    Genetic pollution

    Genetic pollution is undesirable gene flow into wild populations. The term is usually associated with the gene flow from a Genetic engineering organism to a non GE organism; however, conservation biology and conservationists are using it to describe gene flow from a Domestication, feral, Introduced species or invasive species to a Wildlife...
  • Genetic erosion
    Genetic erosion

    Genetic erosion is a process whereby an already limited gene pool of an endangered species of plant or animal diminishes even more when individuals from the surviving population die off without getting a chance to meet and breed with others in their endangered Small population size....