Jon is correct. I know of many trees in the south part of Houston which grow in the shade of other trees, houses, etc. all day. Even still, they get enough light/heat to be healthy and very productive. The basics for the south (Kadota, Alma, Celeste, Brown Turkey, Mission, TX Everbearing, LSU varieties, etc.) will grow in whatever situation you put them in. The varieties which are more acclimated to other parts of the country and some of the more boutique varieties may prefer the partial shade area... especially if it reduces the amount of light hitting the tree during peak heat/light.