I
n the Laaz case, if I understand correctly, his first precocious tree was a chance seedling. It is not likely that such a case was due to more than a couple genes. Single gene is most likely. It is not dominant, if I am to believe everything in this discussion, which I do. So single recessive gene still seems most likely to me.
So why hasn't anybody taken it to the F2? Lack of time and space, I guess. And lack of enough people interested in doing citrus breeding. I'm not the only one here interested in doing citrus breeding. I think there are 10 or more, but mostly small scale. And only 4 trying on a large scale, that I know of, but there might be several quiet ones too.
And of course, citrus breeding runs into seedlings mostly being nucellar in most crosses. But those interested in breeding know about that, and how to get around it.
I'll be 70 in March, so I'm very interested in shortening generation time. I want to squeeze in 10 more generations of citrus breeding. More would be better.
My mother lacked 2 weeks of living 100 years, so I may get 10 generations yet. But no one knows if they will live til sundown. We take what we get and make the most of it.
I had a good friend, an iris breeder after he retired, who planted his last seeds at the age of 101. He never lived to see them bloom, but he had seen several generations of his iris seedlings bloom. No regrets.