الفهرس 
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Abstract
The present work was carried out in the Farm of French group at sadat City,
El Menofiya Government which cooperated with the French Gourmand (Duck
breeders) selection group. The experiment was conducted among 2012 for two
generation in order to study the effect of generations, lines, sexes, and feeding
system on some productive traits of Pekin ducks from two generations.
Tow Pekin duckling lines (Light line, PKL and medium line, PKM) wee
used for both males and females, then they were allawed to two feeding system
(ad-libtum and two meals daily) during the growing period (1 – 50 day of age)
under the condition of commerical farms in Egypt.
In general, the present results indicated that PKM line was more efficient
than PKL line under ad Libtum feeding system, but PKL line was more efficient
for meat production than PKM line under two meals feeding system. Also males
were more efficient for meat production than females under all studied feeding
systems. Breeders and producers must take these factors in consideration the
interaction effects between lines, feeding system and sex when they applied and
produced ducklings for meat production.