Describe in detail pure line slection its advantages and disadvantages
Answers
Answer:
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
Explanation:
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