Ever wondered why some dahlias are a little unpredictable and can change color or even have different colors and patterns on the same plant at the same time? The answer lies in their DNA, specifically in genetic elements known as transposons, or ‘jumping genes.’
I’m endlessly fascinated by the patterns that come from transposons in dahlias. These jumping genes move within the plant’s DNA, creating blooms that are all a little different from the last. I always get a kick out of watching these flowers grow, knowing that each one carries its own unique mark.
Transposons are segments of DNA that can move from one part of the genome to another. When transposons insert themselves into or near genes responsible for pigment production, they can disrupt or alter these genes, resulting in varied and unpredictable colors and patterns in the blooms. Each flower's appearance is shaped by these genetic changes, making the breeding process continually interesting.
My guess is that breeding dahlias for competition or nursery production focuses more on uniformity and stability, so genetic instability has been avoided. But I don’t live in that part of the dahlia world. What inspires me is the weird and wonderful. Intentional breeding with dahlias that exhibit active transposons allows me to harness this genetic variability. By selecting plants with desirable traits influenced by transposons, I can try to breed new varieties that keep throwing out little surprises throughout the season.