Breeding of Vegetable, Spice and Tuber crops (2+1)

Advantages & Disadvantages of Pureline Selection

• Easy and cheap method of crop improvement
• Rapid method, lines are usually genetically fixed and yield trials can be immediately conducted.
• Plants in such variety react in similar fashion to environmental conditions, means they are uniform in performance and at the same time in appearance too.
• Maximum possible improvement over the original variety can be achieved
• Useful in improving low heritability traits as selection is based on progeny performance

Disadvantages of Pureline Selection

• Demerits of pureline selection are given below:
• Purelines have poor adaptability due to narrow genetic base, just opposite to mass selected variety
• Superior genotypes can only be isolated from the mixed population. This selection is powerless to bring changes in hereditary factors i.e. to develop new genotype.
• Mostly popular or in fact limited to self pollinated spp. only
• Time and space consuming
• More expensive yield trials have to be conducted than in mass selection