Quote:
|
Is there a list of which early varieties do and don't have this gene?
|
I do not think mapping across cultivars is very extensive. Seed companies
may know particular genes in their breeding lines, but individuals breeders
are only going to know if the presence of a gene or allele is obvious
in the plant or fruit. For heirlooms, where all development resulted from
simple chance and selection for macro traits like flavor, production,
appearance, "disease tolerance" without a focus on any particular
disease, and so on, no genetic mapping was ever done unless an
heirloom cultivar happened to become part of someone's research
project in plant genetics.