Principles of Plant Breeding (2+1)

Comparison of pedigree and Bulk method

Pedigree method	Bulk Method
Individuals plants are selected in F2 and Segregation generation and individual plant progenies are grown	F2 and the subsequent generation are maintained as bulk
Artificial selection, Artificial disease epidemics are an integral parts	Artificial selection, artificial disease epidemic are created to assist natural selection.
No role of Natural section	Natural selection determines the composition of population.
Pedigree record have to be maintained which is laborious and time consuming	No pedigree records are maintained
It takes 12 years to develop new variety	More than 12 years bulk population > 10 years for effective natural selection
Widely used method	Limited use
Needs close attention from F2 on words	It is simple convenient.
Segregating generation are space planted to permit individual plant selection	Bulk population are planted at commercial planting rate
Population size is small	Larger population are grown and the natural selection expected to the increase the chances recovery of transgressive segregants