introgression
C2/ProficientScientific (Biology/Genetics), Technical, Formal Academic
Definition
Meaning
The process by which genetic material from one species or population is transferred to another through repeated backcrossing of hybrids.
In broader usage, the gradual introduction, infiltration, or incorporation of alien elements, characteristics, or ideas into a different system, structure, or population.
Linguistics
Semantic Notes
Predominantly a technical term in genetics and evolutionary biology. In extended metaphorical use, it implies a slow, often imperceptible, process of incorporation that changes the recipient system.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage; the term is primarily used in international scientific discourse.
Connotations
Neutral, precise, and descriptive in scientific contexts. In extended use, can carry connotations of stealthy or undesired infiltration.
Frequency
Very low frequency in general language. Exclusively high in genetics, evolutionary biology, and related academic fields.
Vocabulary
Collocations
Grammar
Valency Patterns
Introgression of [genetic material/traits] from X into YIntrogression between [species/populations]Introgression via/through [hybridisation/backcrossing]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None specific; technical term.”
Usage
Context Usage
Business
Rare. Could metaphorically describe the stealthy adoption of a competitor's practices.
Academic
Primary context. Central term in population genetics and evolutionary studies.
Everyday
Virtually never used.
Technical
Precise term in genetics, botany, conservation biology, and agriculture.
Examples
By Part of Speech
verb
British English
- The researchers sought to introgress drought-resistant traits into the commercial crop variety.
American English
- Biologists are trying to introgress a beneficial gene from the wild population.
adverb
British English
- The trait spread introgressively throughout the neighbouring population.
American English
- Genes moved introgressively across the species boundary.
adjective
British English
- The introgressed genomic regions showed clear signatures of selection.
American English
- They mapped the introgressed alleles across the hybrid zone.
Examples
By CEFR Level
- N/A - This word is not taught at A2 level.
- N/A - This word is not typically encountered at B1 level.
- Scientists study how genes move between species, a process called introgression. (Simplified)
- Adaptive introgression has played a crucial role in allowing species to acquire novel traits, such as disease resistance, from their close relatives.
Learning
Memory Aids
Mnemonic
Think: INTRO (introduce) + GRESSION (as in progression) = the introduction and gradual progression of foreign genes into a population.
Conceptual Metaphor
Knowledge is Genetics. The borrowing of ideas or traits from one field or culture into another is like genetic introgression.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'интрогрессия' (direct loanword, same meaning) or 'внедрение' (which is more general 'implementation'). The term is highly specific.
Common Mistakes
- Using it as a synonym for simple 'introduction' or 'invasion'.
- Mispronouncing the stress: it's in-TRO-gression, not IN-tro-gression.
Practice
Quiz
In which field is the term 'introgression' most precisely and commonly used?
FAQ
Frequently Asked Questions
No. Hybridisation is the initial cross between species. Introgression is the specific result: the permanent incorporation of genes from one species into another through repeated backcrossing of hybrids.
Yes, but it's a deliberate metaphor. You might speak of 'cultural introgression' to describe the subtle, gene-like transfer of ideas, but this is highly specialised and rare.
Modern humans (Homo sapiens) carry small amounts of Neanderthal and Denisovan DNA due to ancient introgression events.
No. It can be beneficial (adaptive introgression), neutral, or detrimental. It introduces genetic variation which selection then acts upon.
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