
Unfortunately the mode of inheritance re coat type and colour in the varieties of BSD is not
fully understood even by established geneticists - hence why the "melting pot" that was AV BSD came and went and during which time many enthusiasts felt deflated and left the breeding / exhibiting side of their favoured variety.
In the long haired varieties, black to black matings quite frequently contain reds and greys and much less commonly, but nevertheless possible, are blacks born from red to red matings :) The only certainties thus far established in the long haired varieties are that grey to grey will only produce grey.
In the past Malinois have been bred to both the Laekenois and Tervueren - specifically to increase the gene pool of the short and rough coated varieties. As far as I'm aware coat quality however was often mixed, i.e. although the short coat would dominate, it was not always as close fitting or short as it should be :) I have never seen a Laekenois x Malinois in the flesh, but would have thought that the gene pool for the rough coated variety would have benefited greatly from less furnishings as it is only in recent years that we have had Laekenois in this country which have not been profusely "fuzzy" (technical terminology :D )
Groenendael have never been permitted to be IV bred to either the short or rough haired varieties as these would produce blacks in the latter two and neither have that colour permitted as standard.
Selected inter variety matings (in the long haired at any rate) are still done abroad so, coupled with recessive genes in these varieties, we will IMO always have a genuine need for (the ever under threat) cross-registration of progeny to the variety they resemble rather than registered solely in accordance with the parental variety.
My first Tervueren was born of black parents - in fact if I remember correctly there were more Tervueren offspring than Groenendael in that litter. Two others I've owned since have had Malinois in the first 5 generations of their pedigrees.
A few litters of Tervueren x Tervueren both here and over seas have produced one black puppy among their progeny and I know of at least one entire black litter in the UK from two red parents ;)
As Marianne has pointed out, certain "working" lines of Malinois have peculiar colour / markings - blacks and brindles in the main :rolleyes: however these are almost certainly the result of the introduction of other breeds (often they are much bigger and heavier than standard too).
Whoops - turning into War & Peace

:o :P
regards, Teri