Physical-Statistical-Genetic selection vs molecular selection in poultry

It has been undoubtedly proved that these poultry pure line selection based on physical, statistical and genetics have done tremendous amount of improvement in economic and welfare traits in poultry industry since last 3 decades. In India, few breeding organization's have been already established using these techniques and are contributing almost 75% of the total indian broiler production. This has already stopped imports of Grandparents DOC in India since last 5 years. The improvement is continuing. On the other hand, since last 20 years or so we are only hearing across the globe the massive benefits of molecular genetics towards poultry improvement. But even though, big collaborations in the western countries have not yielded significant improved varieties of poultry and the broilers produced from these organisations where molecular genetics is being used from last 20 years are just at par with the broilers produced by dedicated research of fundamental genetics.