wondering if the coloration affects the behaviour in any manner. I'm thinking about getting one if they are even-tempered and calm.

That is super interesting.The panda shepherd was the result of a pure bred shepherd being born with part of one of its genes missing. Genetic tests have pinpointed the exact location of the deletion. Unfortunately, the missing part of the gene also controls other important body functions, so if you breed a panda to another panda, you will not get any pups. The gene combination panda x panda is lethal.
nmn, the problem with bringing up Mom's genetics is that the panda gene is DOMINANT. If Mom carried the gene, SHE would have had panda markings. I studied genetics in university, and taught it in High School biology. It is very obvious to me that the Panda gene originated with Franka, as a result of a deletion in the KIT gene. As you state, it has also been proved that her parents were the dogs recorded by the breeder on her pedigree.There was no testing to prove the breed genetics on Mom, and as we already know, by three generations, if something was mixed in, it will show as a purebred.
Lots of dogs have white on chest and toes - even more common in slowlines than working lines......it is fairly common....I imported a bitch with a bit of white on one toe, and a teeny tiny white chest spot....3-5 generations down, white toes and chest sports are still showing up.....dog wasKKL1 in Europe, so not a problem.....she was a super nice dog, from a great family in all ways, including a littermate and son being alternates for the WUSV with handlers who were not normally top competitors.......Interesting…. My B&T has white markings, she’s a Slovakian import with papers who I’ve never thought of as panda… she’s just a great Czech bitch 👍🏼
Lee, had a good laugh at this particular typo!even more common in slowlines