A new recombinant in the heteromorphy ‘ S ’ supergene in Primula

摘要: A novel heteromorphic phenotype, P*, in Primula × tommasinii differs from long-styled (‘pin’) morphs, half the pollen having a size distribution typical of pins and other short-styled ‘thrums’. All P* is compatible with pin mothers, on stigmas, but incompatible thrum mothers. However, as mother, shows same compatibility relationships do pins. The phenotype inherited single dominant factor. plants are heterozygous for recessive ‘pin’ chromosome, offspring selfs give ratios 2:1 P*: pin, rather than 3:1. have styles, stigmatic papillae style cells shorter pins, much longer thrums. We conclude that this results recombination within heteromorphy supergene between locus which controls one dominance size. On recombinant chromosome we suggest loci controlling female length (in part) (G/g), anther position (A/a), (Mpm/mpm) carry recessive, pin-linked alleles; whereas those (Pp/pp), male (Pm/pm), (Gm/gm) dominant, thrum-linked alleles. lethal l also linked to part chromosome. Thus, it appears at least seven control supergene. show first time independence incompatibility, under gametophytic control, character being controlled by recombinable locus. confirm earlier suggestions length, stigma papilla cell developmentally correlated, two additive effects, genes recombinable, gene