Ploidy of some roses

Trying to find the ploidy of the following roses:

Snowbird, Cl.

Secret Garden Musk Climber

Alberic Barbier

Gloire de Dijon

Can anyone help?

On the same subject, what is the best source for finding this information?

Snowbird, Cl.: almost certainly 28

Secret Garden Musk Climber: likely 14, but possibly a triploid. Pollen is fertile.

Alberic Barbier" almost certainly 14, possibly 21 but unlikely.

Gloire de Dijon: 28, but highly reluctant as either a seed or pollen parent. One of the most difficult tetraploids to work with, suggesting to me that its gene count of 28 may be erroneous.

Paul

Link: www.rdrop.com/~paul/genecount.html