Difference between Mass Selection and Pureline Selection (Mass Selection vs Pureline Selection)
Selection is the oldest breeding method. This is the basis for all crop improvement methods. Selection is of two types viz., natural selection and artificial selection. Artificial selection is of three types: mass selection, pureline selection and clonal selection.
Mass selection: This is the simplest and the oldest method of crop improvement practiced by farmers. It is practiced in crop pollinated crops.
Pureline selction: The term pureline was first introduced by W. L. Johannsen of Denmark 1903. A pureline may be defined as the progeny of a single individual obtained by selfing”.
Mass selection vs Pureline Selection Mass Selection1. Used in both cross and self pollinated species.2. Genetic variation is present.3. Mass selected variety has wide adaptation4. Produce of variety is less uniform. 
Pureline Selection1. Used in self pollinated species2. Genetic variation is absent.3. Pure line variety has narrow adaptation4. Produce of variety is highly uniform
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