Figure 4.—

Genotypes of recombinants recovered in the ui6.1 region in F₂ progeny of bridging lines containing both the chromosome 1 and 6 factors. The compatibility or incompatibility of recombinants was determined by pollinations onto pistils of the allotriploid S. lycopersicum × S. lycopersicoides hybrid. Open bars, homozygous for the S. lycopersicum alleles; gray, heterozygous; and black, homozygous for the S. pennellii alleles. In the absence of the S. pennellii chromosome 1 factor, all plants elicit an incompatible reaction, regardless of their genotype at ui6.1. Recombinants that were heterozygous for the parental S. pennellii introgression were progeny tested to determine the phenotype of ui6.1.