Good to hear your family like fish you selected. Here is the genetics you pm'd me for. My spawn logs on the forum seem to have some gaps, with experience I'm sure I will reach the stage of having everything needed.
Grand Parents; Multi Colour Giant Geno Male, ex Thialand and a Royal Blue Double Tail female (Best Female prize winner at 2007 Queensland Betta show).
Parents; (extract from spawn log) (Feb 20 2009, 02:20 AM ) Two mostly white bodied fish from the parentage above, large bubble nest, looked like hundreds of eggs outside of the cup in amongst the duckweed. By the time I removed the male I was concerned of where all the fry were, I had seen alot of fry on the bottom of the tank the night before.
Result is 7 fry around 1cm presently. See I didn't make notes of the date. (extracted from spawn log)
This is the spawn he came from, Photo 6th March 2009.
As they have matured the result has been 5 females, 1 male plakat plus the male you selected.
This will be the male parent
As we can see the grand mother was double tail, so a double tail female from one of the younger spawns will make a nice match. ( If you like double tails) a single tail from the same genetics will still produce double tail like the two black double tail males that are due to be jarred from tank 10.