Oooooooooh well done on citing this article and opening up and interesting debate!!!
I actually spent sooooooo much time writting a reply I timed out
hehehe
Anywho......I agree with Emma,Cob-web and Karma (et al)
The science behind this is absolute mince!!! 50-odd samples would be adequate if they were looking at a 'one-gene-one-trait' example with a high contribution but behaviour has thousands of genes involved each with a low contribution (less than 5%) and collectively with less than environment!
Plus this study is heavy on 'people bias', they dont actually measure anything except what they observe themselves and what might be seen as aggression to someone is playfull puppy behaviour to others! You would think a study into aggression would take advantage of stress hormones such as cortisol etc!?!!!!
Plus how well can the behaviour of a 7 week old puppy predict adult behaviour? A longitudinal study would have been more valid where they reassess the dogs in 5 years time and correlate coat colour to the number of aggressive episodes.....but all the puppies would have to be brought up exactly the same!!!
The golden/red issue is an interesting one however, after all red hair in humans is the only colour which can be predicted by a genetic test before birth as it is caused by a rare mutations rather than several common variations over several genes like other colours.....they also have a different smell etc but I have no idea if this transfers over to dogs....I suspect not. Plus our prison's aren't exactly packed with red-heads are they? Neither are our universities...I would say they are equally distributed throughout all walks of life
I would think that the bad rep goldens/reds get is down to the improper inbreeding and farming that went on after this colour became hugely popular (was this due to Lady and the Tramp?) decades ago, due to that practice a number of golden puppies with neurological and behavioural issues where born unfairly tainting the reputation of the goldens which had been carefully bread for good temperaments!
Behaviour is such a complex issue, biologically everything from metabolism to even muscle strength can affect it, studies into human behaviour is done on fruit flies in an effort for simplify it, so I think these people were jumping the gun a bit!
Sorry Ive rambled again, I just think that bad science/bad reporting is so detrimental, yes I do think there WAS a small problem with Goldens/reds but I think that this was due to bad breeding practices and not because the golden colour is in the same genetic haplotype as a 'gene for' aggression, simply because I don't think an aggression gene exists. I also believe that proper breeding in recent years has rectified the situation.....I certainly wouldnt be put off a golden cocker, they are lovely