“Transference of a genotype or a group
of genotype of crop plants from the
place of their cultivation in to a new
area where they were not being grown
Types of Plant Introduction
Based on adaptation
Primary Introduction - Variety is well adopted to the new
environment, released for commercial cultivation without any
alteration in the original genotype.
Secondary Introduction - Introduced variety may be subjected to
selection & hybridisation to isolate a superior variety.
Based on utilization
Direct Introduction –new variety takes no time for establishment
Indirect Introduction –new variety takes some time for
Exotic variety – foreign variety directly recommended for
commercial cultivation in new environment.
Plant Introduction Agencies
IBPGR/IPGRI (1974) –
Activities of NBPGR :-
Introduce & supplement of required germplasm from & to.
Exploration & collection of valuable germplasm.
Inspection & quarantine.
Testing, multiplication & maintenance of germplasm.
Publishing its exchange & collection list.
Setting up natural gene sanctuaries.
Sources of Plant Introduction
Centre of diversity
Procedure of Plant Introduction
Procurement of germplasm
Multiplication & Distribution
Procurement of germplasm
As Gift from individuals / institutuions
collection through exploration
Restriction on export & introduction of plant
Keeping materials in isolation to prevent the spread of
Fumigation or other treatments (if necessary).
According to destructive insects & pests act, 1914,
quarantine for different group of plant produce is carried
out by different agencies.
Quarantine & fumigation centres at Sea-ports(8),
Airports(7) & at entry point of land routes(7).
Accession number is given to a new introduced material
Information regarding name of species & variety, place of origin,
adaptation & its various features are also recorded.
Cataloguing of germplasm collections is published by gene bank.
The introduced materials are of 3 types & given a prefix-
EC – Exotic Collection
IC – Indigenous Collection
IW –Indigenous Wild
Purpose of Plant Introduction
Obtain an entirely new crop species (Maize, Potato, Tomato etc.)
To serve as new varieties (Sonora-64, Lerma rojo – wheat. TN 1, IR 8 -
To be utilized in crop improvement
To save the crop from disease & pest. (Coffee was introduced in
South America from Africa to prevent losses from leaf rust).
To be used in scientific studies.
To be used for aesthetic value.
Crops are cultivated extensively after their
introduction as new crop species.
Introductions have been directly released as variety.
Varieties selected from introduction
Introduction helps to develop varieties through
Merits of Plant Introduction
Entirely new crop plant is derived.
Quick & economical method of crop improvement.
Genetic base can be broadened by plant introduction.
Protection of crops from damage by introducing them in to
disease free areas.
Development of superior varieties through selection &
hybridization by using introductions.
Demerits of Plant Introduction
Introduction of weeds along with introduced
Introduction of diseases along with introduced
Introduction of insect pest along with introduced
Some plants introduced as ornamental species became
Some introduced plants are threat to the ecological