Conversion of a rice CMS maintainer into a photo- or thermo-sensitive genetic male sterile line.

ABSTRACT: A maintainer line of 3-line hybrid rice commonly presents a certain genetic distance to a 2-line restorer line, but in many cases, 2-line restorer lines present defects upon recovery of the object cytoplasmic male sterile (CMS) line of the maintainer line, which impedes the utilization of their heterosis. Here, we report a strategy and an example of converting a maintainer into a photoperiod/temperature-sensitive genic male sterile (P/TGMS) line with an almost identical genetic background, thus maximizing the heterosis. Firstly, through treatment of maintainer line T98B with ⁶⁰C_O-γ irradiation, we identified the TGMS line T98S, which is sterile at higher temperatures and fertile at lower temperatures. Secondly, the T98S line was proven to be identical to T98B with reg

SUBMITTER: Tan Y 

PROVIDER: S-EPMC5906493 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature