How do you express the meaning of worlds like race, breed, cultivars or variety ?

Explanation

The meaning of the given words are as given below
Race It is a classification system used to categories humans into large and distinct population of groups by anatomical, cultural, lingusitic, geographical, historical and for relegious relationship.
Breed It is a specific group of domestic animals or plants having homogeneous appearance, homogenous behaviour and other characteristics that distinguish it from other animals or plants of the same species and that were arrived at through selective breeding.
Cultivar Is is a plant or grouping of plants selected for desirable characteristics that can be maintained by propogation. 'Cultivar' stands for 'cultivated variety'.
Variety A variety arises naturally in the plant kingdom and plant grown from its seeds will typically come out true to type.