HomeInternational Rice Research Notesvol. 23 no. 1 (1998)

Krishna CMS lines in the background of four different cytoplasmic sources in rice

S B. Pradhan | P J. Jachuck

Discipline: Agriculture, Genetics



Four cytoplasmic male sterile (CMS) lines of Krishna with sterile cytoplasm from four different sources (wild abortive [WA], O. perennis, Kalinga 1, and Lalruma from Mizoram) have been developed. The two CMS lines-Krishna A with WA and Krishna A with O. perennis as a source-were developed through conversion with CMS lines V20A (WA) and IR66707A (O. perennis), respectively, by subsequent backcrossing with common isonuclear maintainer Krishna A. But Krishna A with Kalinga 1 and Krishna A with Lalruma cytoplasmic sources were developed through indica/indica crosses. These four CMS lines are all dwarf in stature, are of medium duration, and have reduced white anthers that exhibit 80-90% unstained withered pollen grains.