Are negative breeding traits in Andalusia horses correlated with coat color and Carthusian ancestry?

Andalusian horses can be white (gray), bay (reddish-brown with a black mane, tail and legs), or black in color. Historically white horses were most highly valued, but recently there has been an increased demand for black horses. Because of the long preference, white Carthusian Andalusians are of higher quality than non-white and non-Carthusian Andalusian horses. For my thesis, I examined whether negative breeding traits in Andalusian horses are correlated with coat color and Carthusian ancestry. This hypothesis was tested in two different manners based on my observations and on the observations of Spanish judges throughout the centuries. The first method used was a program called MELPI in which two hundred and fifty horses were randomly chosen and researched. The second method consisted of my attendance of two horse shows in Florida in which 50 horses were randomly selected. The results for both methods of evaluation supported my hypothesis that negative breeding traits in Andalusian horses are genetically correlated to the color gene