The rose in commerce as Francis Dubreuil is probably a Kordes Hybrid Tea Rose -- 'Barcelona'. In my So Cal garden, it was not a strong grower, but I'm told it is dynamite when budded on Fortuniana.

I would suggest afternoon shade for a TX heat situation, because the dark red color tends to toast easily. This is generally true for all dark red roses. My 'Barcelona' is vigorous on its own roots. Here it is a very good rose, but my summer temperature hangs right around 80F most of the time.

I found Francis Dubreuil to burn within 5 minutes of sunshine, here in Crete. It needed permanent shade here, which I did not have, so I gave it away.
It was a shame, because it is a lovely rose, with a good strong scent.
Daisy

Francis Dubreuil is a stronger grower on its own roots here, too; around 5 or 6 feet tall x 7 feet wide. It is a good repeat bloomer. It bloomed in April, has a second flush now, and will just keep doing that on through the fall. Mine gets afternoon shade, which definitely helps when the temps get into the 90s.

I have mine in afternoon shade, though when those temps start going over 100 everyday, the blooms still burn quickly. In any case, I love this rose. The fragrance is to die for, and I enjoy picking blooms early in the morning and carrying them around with me. I don't have major problems with disease or chilli thrips (huge plus) with this rose.

Thanks everyone! Sounds like it would be worth it for the fragrance and I do have a good spot with afternoon shade.