FAN, SHUGUO*, CHENGYE LIANG, AND HONGXIAN LIU. South China Institute of Botany, Academia Sinica, Guangzhou 510650, P. R. China. - In vitro mutation of rice (Oryza sativa L.) from GMS to CMS.
Pollen free type (PFT) genic male-sterile (GMS) line Nanguangzhan had
turned into wild abortive(WA) type-like cytoplasmic male sterile (CMS)
line. The restoring and maintaining relationship of NT1 and NT2 (the
two typical abortion type (TAT) variants derived from Nanguangzhan
somaclones) was similar to that of WA type, viz. the restorer lines
and maintainer lines of WA type were also fit for NT1 and NT2. NT1
had been backcrossed with its maintainer lines for ten generations and
kept sterile all the way. This might be the first report of this kind
of mutant derived from somaclones of rice which had turned into CMS
from GMS.
Key words: callus induction, cytoplasmic male sterility (CMS), genic male sterility (GMS), in vitro culture, Oryza sativa L., plant regeneration