Maybe the extreme traits are copmpared with together that will be easily observed, like plateau and plain, cold and tropic, hyproxia and normal. And they are some contrary traits.

What are the probable gene to be targeted?

So some people want to know this, they sequence many exomes or genome to decide if the genes are inclined to positive selection. I know only a little.

Traits related to the fitness of the animal. Disease resistance, reproduction traits are important in any livestock species, including poultry. For chickens and Ostriches I would say it would be important to look at avian influenza, and identifying birds that are resistant to avian influenza. That can be done through comparing genotypic information between birds that are part of a population testing positive for this disease, before culling out the whole population.

'That's right But if the species/breeds of livestock i e cattle, camel and yak what should be an experimental design o delineate the conclusive results that can be applied in future.

I can say, there are three traits asociated to adaptative and diseases resistance\susceptibilites the slick gene associated to lowering the corporal temperature and avoid the ticks attachment, and the BoLA-DRB3 and SLC11A1 genes to resist some diseases all of those genes are associated to creole cattle

In my opinion this is difficult to say with these two approaches

I want to have reference of these reports to consult

Thanks for the information in advance

you may find unique adaptive traits using signatures of selection, biased Fst, or landscape genetics, among many available mothods. Search papers of P. Ajmone-Marsan, L. Pariset and S. Joost respectively.

Can I get any literature on adaptive traits of livestock?