Pure line Selection

What is Pure line Selection – Definition?

Pure line selection is a method in which new variety is developed by selection of single best plant progeny among traditional varieties or land races.

What is Pureline – Definition?

Pure line is a self pollinated descendent of a self pollinated plant.

Desirable types already exist in population. Those are isolated through careful testing procedures. Another term used for this method of plant breeding is individual plant selection, as large numbers of plants are selected, but those are harvested individually, their individual progenies are grown and evaluated and then best progeny is released as a pureline variety.

Genetic basis for Pureline Selection

Pureline varieties are homozygous and homogeneous as they are genetically similar and true breeding. Such varieties possess narrow genetic base so they are more susceptible to diseases, and have poor adaptability. A pure line breeding method is normally used for self-pollinated crops, but has importance in breeding of inbred lines that are used to make hybrids in self or cross pollinated crops. ( Know Mass selection )

To understand the procedure for development of such varieties go through the page Procedure for Pureline Selection. This page includes main steps and detailed procedure for the development of pureline variety.

To know advantages, disadvantages and applications of pureline selection method of plant breeding visit Advantages – Applications of pureline selection. The page enlists all these.

Examples of Pureline

Crop Variety Features Selection from and at
Cowpea Suvita-2 Striga resistant line Selection from landrace in Burkina Faso
Wheat Kanred Better in winter hardiness, rust resistance, earliness in maturity Selected at Kansas from Crimean variety, an introduction from Russia
Oat Columbia Matures early, grain with high test weight. Selected at Missouri station from Fulghum variety

Read Pure Line theory of Johannsen.
For another selection type visit Mass Selection method