I ran across this one for you genetics people.
Knowning as Rolling Matings, this system has been in use for many years and is one of the easiest as far as record keeping is concerned.
Basically, it involves breeding cocks to pullets and stags to hens.
For example, let's say you start with a trio, 2 hens and 1 cock bird (not related).
First year: breed the non-related cock to the 2 hens. Once the chicks are grown save the 2 best stags (you should always save twice as many as you need) and the best pullets.
Second year: breed the original hens to their sons and the pullets to their father. Once the chicks are grown save the best stags and best pullets.
Third year: Now is when the matings really begin to 'roll.' Your pullets from last year are now hens; so, they join the original two. Your stags are now cocks and join the original cock. Take your stag(s) that were hatched in year 2 and breed them to the hens; take your cocks and breed them to the pullets hatched in year 2.
And so on and so forth...................
Each year you should cull your hens and cocks to the best birds just like you do the pullets and stags. There are variations of this method, but you can figure those out yourselves. This system is easy and it works extremely well.