Development of isonuclear male strile lines with four different cytoplasmic backgrounds in rice

摘要

For the first time in rice, four cytoplasmic genetic male sterile (CMS) lines with different cytoplasmic backgrounds, namely, Wild abortive Oryza perennis (through conversion), Kalinga I, and Lalruma (through indica/indica hybridization) were developed by repeated backcrossing with a common isonuclear maintainer, cultivar (cv.) Krishan. These four new CMS lines with a common nuclear background were confirmed to be cytoplasmically different from one another.