CC-41 cr1 mt+

Locus: CR1, linkage group XII/XIII

Source: Product 5.6.3 from a cross of wild type to the original ac20 cr1 double mutant (CC-154 mt-, a strain now discontinued.)

Comment: This strain was used by Boynton et al., J. Cell Sci. 10, 267-305 (1972) in their study of mutants deficient in chloroplast ribosomes, and defines the cr1 mutation in terms of chloroplast ribosome content (accumulation of 54S subunits). This strain now shows a ribosome profile on sucrose gradients more like that of the ac20 cr1 double mutant. It grows slightly on minimal medium. Scoring is easier at cool temperatures, e.g. 15 degrees.