Techniques and Methods:-
Inbreeding:-This is usually done by crossing two members of the same species to get the specific trait that is wanted. For example this is done in dogs and tigers.
Genetic engineering:- Genetic engineering is when humans inserted a new gene directly into their DNA of the organism. For example this is done in Tomatoes, soybean and rice.
self-fertilization:- it is mostly done in plants and also in some invertebrate animals by fertilizing by their own pollen or sperm rather than that of others. For example this is used in flowers and peas.
Mass selection:- this is used for plants and animals it is a large –scale breeding of individuals from the entire population. For example this is done in Cotton and fish species.