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 Selection
1. Used in both cross and self pollinated species.
2. Genetic variation is present.
3. Mass selected variety has wide adaptation
4. Produce of variety is less uniform.
Pureline Selection
1. Used in
self pollinated species
2. Genetic
variation is absent.
3. Pure line
variety has narrow adaptation
4. Produce
of variety is highly uniform
Post a Comment
We Love to hear from U :) Leave us a Comment to improve this site
Thanks for Visiting.....