Sufficient Number Of Sample To Learn Bayesian Network

Question

[jack]

I want to construct Bayesian network for a 800 genes. I have only 30 cancer samples and 30 normal sample. whether my data is reasonable to learn Bayesian network?

[Petr Ponomarenko]

Could you please elaborate why for 800 genes, what info you have on these 30+30 samples and what question your Bayesian network has to answer. Why it has to be Bayesian network?