Hi Maxine and Ki Team !
Well Nude koi before we get down and dirty !lol could not resist that one ,falls off me chair ,head first into book case ! missing my small grow out tank ,with my f2's in !lol !
Ok well yes I did Spawn with a selection of males from the same brood so all brother and sisters ! ,so you get all possable crosses also the fact not all fish carry the right set fo gene's even if they look perfect !.
So to cover all angles and out come's yes use these nude leathers as they will produce some great looking fish as they are quailty looking and skin is Amazing so yes there is a risk of the leathal gene but you have striped fish (scaled carring gene) to help fix the line !, in there and Ki Asagi and also the fact you have these blue dorsals will also carry scaled genes as head to first ray dorsal will give you scaled gene's also . !.
so you have in my opinion the right mix ! so it's just really selection and segregation and putting pair's and trio's together and taking some from each spawning and comparing them if you can in a set of stew ponds made out of straw bales and a liner ,with air and seeding with manure 14 days before pland spawning and adding a culture of daphnia if needed ,and getting them up to a size to compare results of each set ! ,so on each a tag of pic's of brood fish and a result sheet all in a weather proof plastic sleve pined on each pond these can be shallow 18 -24inch inches ,and it's all on surface area so 10ftx 10ft and can be caged or if space is a problem just dig out small fry ponds 4ft x 2ft x 2ft deep and use as a sample ponds so say 250fry in each to see in the first 6-8 weeks how they fair and give you what you need to know as to what fish have the right gene's combo for your perfect fish .
That's how I do it but in Aquariums in a shed ! in heated tanks and this give's me quick results to see the best pairings and trio's .
So just some idear's here to help out !.
Fly the flag sing the song Ki is Going big ! '' IM FOREVER KI ''