Interesting stuff. The more separate peoples stay together in one location, the more blended their genetic DNA becomes The Spanish were in the Americas a mere century longer than the English (fall of Mexico City, 1521— landing at Plymouth Rock, 1620) but their DNA is far more blended with Native and African DNA than descendants of their counterparts of primarily English ancestry . . . in a mere century, less than 1.7% of recorded human history.
I think that might be more a function of culture rather than the difference of 100 years. Both the French and the Spanish were much more willing to produce children with native populations and Africans than were the English. A big part of the cultural difference was that the English brought their women with them. The French and Spanish not so much.
My daughter in law is a descendent of the Fils de le Roi (Daughters of the King). They were single women, usually poor or orphaned who received a dowery from the King of France to emigrate to New France in order to provide wives to French settlers. While they were expected to marry, according to accounts, they got to pick their new husband (Just like today).
“Interesting stuff. The more separate peoples stay together in one location, the more blended their genetic DNA becomes The Spanish were in the Americas a mere century longer than the English (fall of Mexico City, 1521— landing at Plymouth Rock, 1620) but their DNA is far more blended with Native and African DNA than descendants of their counterparts of primarily English ancestry . . . in a mere century, less than 1.7% of recorded human history.”
One of my semi white UK/Scot/Wales/Western Europe DNA snowflake relatives described “ what you noted as: “The Spaniards were hornier and most often came over here without wives. So they $crewed a lot more natives and left more mixed blood offspring. Than their white counterparts.
Those horney guys versus the sexually uptight white protestant guys often with a wife and children left wide trails of DNA.
The white couple might have had 20 plus children, but the descendants often had the same white DNA and father and mother.
This same previously unknown DNA relative and I had heard for years of having Cherokee ancestors. Between the two of us we have close to 200 identified on paper Indian relatives and yet zero Indian DNA.
We both also have about 3% African DNA from the same African area.
Yet we can’t find a single African ancestor in just under 50,000 ancestors between the two of us.
The Spaniards and mixed bloods from the Caribbean as you noted had been actively breeding in America since the late 1490’s. As a result, possibly no true Native American Tribes existed in our SE part of what is now America
It isn't just time....religious aspects are also in action. The Spanish Roman Catholic perspective did not object to intermarriage with local populations nearly as strongly as the English Protestants, although such intermarriages certainly happened.