New mutant at the sp locus.

Rick, C.M.

Amongst some M/2 populations of EMS-treated VFNT Cherry (LA1221) grown in 1985, one segregated for determinant habit. The segregtion was 35 + : 6 sp. The same population also segregated for two distinct types of dwarfs, a stunted light green, and an ill-defined sterility; otherwise, the population was typical VFNT Ch. A cross between one of the fertile sp segregants and VF36 (sp) yielded a progeny of eight plants, all of which had typical sp phenotype. As far as I know, this is only the second mutation reported at this locus. No new symbol is proposed because the phenotypes appear identical. Attention is called to this new line because LA1221 has become popular as a line for experimental purposes calling for compact habit and prolific flower and fruit production. The sp version is exceedingly compact from the combination of determinate growth and short internodes. Despite its severely restricted growth, it flowers and fruits abundantly. Ample seeds of this line (LA2705) have been produced to supply interested investigators.