I have a couple of roses that are, unfortunately, heavily diseased. They live in a yard that is filled with diseases that we do not fully own and cannot clean up. A couple of the roses are very special to me because they belonged to my grandmother, who has recently passed away. I grew up bringing her bouquets of them, and wishing I could make a perfume that smelled like it. They were gifted to her by my grandfather. I cannot find another rose like it. I was trying to look up some possible solutions, and I've tried to fight back the diseases, but it's like throwing a cup of water on a blazing fire. It seems that two of the potential problems aren't even curable. One rose in question seems to be mainly infected with mosaic virus and blackspot, but I am a novice, and I have spotted what looks like either powdery mildew or blight in our garden as well. The flowers on the rose that is opening now have stunted petal growth and burnt looking petals. It is a large flowered, double, purple/blue rose with a lovely smell. ("Blue Moon"?) It appears to have mosaic virus and blackspot, or potentially cercospora leaf spot, which has spread to the canes. She also had a pink "Cinderella" fairy rose, which was grafted as a standard but is now likely a rambler, and a large white one named for a saint that I cannot remember, but which also smells wonderful. They are likely similarly infected, as she was unable to care for them near the end of her life. Is there a chance I could extract a disease resistant seed from the roses? Would there be a particular method that could help me collect good seed? I don't know if a rose keeper could help me at least track down another rose like hers. Thank you!