Therefore, 'Pearl Sanford', which happens to be an excellent seed parent, has been crossed with two lines of roses that have very good black spot resistance. The first shown below is a cross of 'Pearl Sanford' X "Basye's Thornless" (aka "Basye's Legacy"). This is a brand new seedling from this year. It only has 8-10 petals, but has taller buds than most "Basye's Thornless" seedlings and it's petals unfurl nicely. It sets hips very readily and this coming year I will be testing it's germination rate.
The second seedling is a cross of 'Pearl Sanford' X 'Double Knock Out'. I didn't expect to get much from this cross, however, this seedling has very full blooms with fairly good form. It gets some powdery mildew when conditions are right, but does not get severe infections. It appears to not set hips, however, it produces at least some pollen.
I am hoping that by combining these two lines, I will be able to get an exhibition mini that combines good powdery mildew resistance with better horizontal black spot resistance. Since I will not be making crosses between these two until next Spring, the first seedlings will not sprout until 2015. This hobby has a way of developing patience!