This is a recent, very general overview of rose breeding that hits all the topics in a cursory way but does have some useful citations for further reading. This link goes to the html version where there is then a link to the pdf.
Datta, Subodh Kumar Datta. (2018). Breeding of New Ornamental Varieties:Rose. Current science. 114. 10.18520/cs/v114/i06/1194-1206.