Do any of you happen to know how the genetics of Verticillium resistance work? (For those interested in breeding varieties with said resistance from crosses of other varieties with it.)

Suppose you've got Roma VF to work with (which is OP--not an F1 hybrid), and you want to cross it with other stuff (like, say Summer of Love, or another big, soft, prolific tomato), while preserving its Verticillium-resistance.

Does it follow the dominant/recessive model? I suppose it's possible there are multiple kinds of genes responsible, depending on the variety.

@Shule I would contact your states school of agriculture. They love helping out the community.

It is conferred by the Ve gene locus which contains two genes - Ve1 and Ve2. Ve1 confers resistance.

I am trying to find some info with respect to homo/heterozygosity.

Seems to me that the Ve genes are dominant, e.g.

Verticillium resistance in most tomato cultivars is based on the introduction of the dominant Ve locus that was identified in the tomato accession Peru Wild in the 1930s (Schaible et al., 1951).

https://www.researchgate.net/publicati ... Tomato_Ve1

Sequences were determined for codominant RAPD markers closely linked to the Ve locus, a dominant verticillium wilt resistance gene in tomato.

https://www.cabdirect.org/cabdirect/ab ... 9521100756