I do not religiously commit myself to particulars. For me there is a lot to a bird.
I believe that the process should vary from breed to breed. For example, it does not make a lot of sense to put excessive pressure on rate of maturity in a breed like the Minorca. It takes time to develop the large frames, and you do not want to drift towards a lighter Leghorn type. What you want is a large framed bird that is a productive layer of extra large and jumbo sized eggs. Otherwise, you are working away from an advantage that the breed should have.
I also feel as if the birds have some say in what we would emphasize, and that can evolve over time. In other words, there might be a need to prioritize the largest need.
I have started a flock of Catalanas, and though I am still trying to get a "stable" flock established, I intend to put a particular emphasis on their production characteristics. They are already as much or more productive than most that I have tried. I believe that they have excellent potential. I want to see more uniform results, and push them a little farther.
They mature sexually, at a fast rate. However, it takes them some time to fill out enough to be useful for the table. With the Standard weight being 8lbs for cock birds, they should be a dual purpose bird. They had/have a reputation for good quality flesh in their country of origin. I am showing preference for birds that fill out earlier than their siblings. I have added another strain, and I am building one for a future outcross. My hope is that I will have enough variability to make reasonable progress.
At this point, I have some birds reach appropriate weights. The average overall is not satisfactory.
The pullets are reaching POL @ 20wks. I would be satisfied if they averaged 22 wks, because of the size and weight issues. Currently, I am not applying any pressure on this point. Instead, I am emphasizing type and weight. If needed, I can adjust in the future.
Egg size is very good, and so is egg quality. There is some variability in shell color. There is a range is accepted in their country of origin. From white, off white, to lightly tinted pink. I prefer the lightly tinted pink eggs, and guess that many would. Once the flock is established, I intend this to be a selection point. I have good egg size, so I will not be be setting eggs of average quality or size. I do not want to lose this strength.
When they molt and rate of molt is highly variable in this flock. I am struggling to get to this point, but I do not like an excessively early molt. I want the pullet year longer. Then I am eyeing who comes back to lay the soonest, feeling like this helps me tease a few more eggs from a hen during the off season. I also like a hen that comes into full lay earlier in late winter than her siblings.
For me, if the lay rate is good, it becomes a series of small victories. Teasing a few ore from them from POL, then before they molt, after they molt, and again in spring. An example could be on all of these points the difference between a 220 per annum layer, and 240 eggs.
I do not feel like I know who my hens are until they have come back into lay in the spring. A complete laying cycle.
I do not believe a male is an more influential than the female counterpart, other than sex linked color genes. Otherwise the contribution is even. I do believe a male has more influence in a flock so he is especially important. I cannot test all of the cockerels, but I can see pen averages. Over time, it may be a reason that I go another season with a cock bird, or replace him with a cockerel. It could also mean that a male could be used in an additional pen.
I agree on the inheritance of laying genetics. It is not a single gene, but a compilation of traits. Family inheritance (or influence) rules. It is ore about the birds behind the birds than the individual itself. Other than I cannot practically trap nest, the main reason I am most concerned with pen averages than individual numbers. If I identify a pullet that is hurting an average she is removed, unless she has a remarkable trait(s) that I need. Then she is likely to be used once.
I am unforgiving concerning type and capacity. I might not be (other than capacity), if I was not working with a pure breed. Then I would probably be influenced by personal preference.
Of course their is a lot more, but this post is excessively long already.