Getting back to the point I was trying to make about Papilio dardanus
Within a given population, something more than 90% of the females will mimic three model species (one mimicry per female). And it is not coincidental that the pattern of dominance among the mimic patterns parallels the relative abundance of the model species. I.e., Where model species A is most common of the three, and C is the least, the mimicry dominance is a>b>c.
However, in a different population, the model species may be D, B and C, where D is the most common, A the least.
The first point to note is that the dominance is not based on the individual dominance of all the various genes involved in the mimicry pattern. Dominance is a quality of the regulator.
Now, if a P. dardanus
female of the (c) mimicry pattern is mated with a male with the (c) genotype from the second species, the female offspring should duplicate mimicry of species C fairly well. But if a female (d) mimic or male with (d) genotype is mated to any member of the first population, the (d) pattern breaks down.
Something similar appears to be going on in roses. In the cases of both Rosa laevigata
and R. bracteata
, the distinctive characteristics of the species can be entirely lost in F1 hybrids or their progeny.
Penzance pollinated various HPs by R. laevigata
, but few of the progeny showed even vague hints of the paternity. Maybe he was sloppy in his technique. But Van Fleet got the same results using R. laevigata
as the seed parent.
http://bulbnrose.x10.mx/Roses/breeding/ ... e1896.html
http://bulbnrose.x10.mx/Roses/breeding/ ... e1908.html
'Mermaid' is an obvious hybrid of Rosa bracteata
, but its progeny may show little of the species.
History of the Rose - Page 90 (1954)
Roy E. Shepherd
This beautiful pillar rose, introduced in 1918, was created by W. Paul by crossing R. bracteata
with an unknown yellow Tea Rose. Mermaid is not dependably hardy in the North, but the freedom with which it produces its large, single, pale sulphur-yellow flowers and the attractive foliage make it a very desirable rose and worthy of any protection it may require in the colder parts of our country. With its many desirable attributes, including fertility, it seems strange that there are but few progeny of Mermaid worthy of mention, and these are much inferior to the parent. SEA FOAM (Paul, 1919) bears small, double, white flowers and partakes more of its Polyantha parent than it does of Mermaid. LEIPSIG (Kordes, 1939) is the result of crossing Eva with Mermaid, but the influence of the latter is again very slight. Apparently the characters of Mermaid are suppressed by those of the variety with which it is crossed, as Leipsig is a 3- to 4-foot shrub rose that bears semidouble, orange-scarlet blossoms in clusters and is recurrent in its bloom.
'Pearl Drift' is reported to be Mermaid x New Dawn, though there seems to be some dispute. It looks like something that might come from 'New Dawn' without outside help. But I have only seen pictures.