Thanks for your reply. What makes you doubt that Daniel was the father? Have you considered joining the Tucker Y-DNA project? Several of the Tucker researchers I've been working with online have had a male Tucker take the Y-DNA test, including my first cousin, and the results are helping to separate the many Tucker lines in Virginia. If you Google the Tucker DNA project, I'm part of the Hanover Virginia group, which was not known until our little group began testing. I wonder where you'd end up.
In an effort to try to determine your William and Gustavus's line, I even paid to get Gustavus AR's death certificate. It didn't provide any new info, but I can share the info it had once I get back home if you want it. (I'm out of the country.)
Keep me posted.