Getting production duck,will I be able to breed them for many generations ?

[razvanM]

Getting production duck,will I be able to breed them for many generations ? I heard they will breed nicely for the first generation but after few generations the fertility will be very poor even if they are unrelated,is this true ? Because if so I will need to keep my breeders for many years.The will be one of the heavy breeds presented here http://www.thepoultrysite.com/focus/groupe-grimaud/2071/grimaud-freres-selection-peking-ducks