title: Cytological observation of two environmental genic male-sterile lines of rice.
abstract: We report here two environmental genic male-sterilities (EGMS) in rice. These two EGMS rice lines, thermo-sensitive genic male-sterility (TGMS) and photoperiod-sensitive genic male-sterility (PGMS), are controlled by temperature and photoperiod, respectively, in determining their male-sterility. Male-sterility of the TGMS and PGMS was found to be induced when they were grown at 32 degrees C/26 degrees C (day/night) with 14 h daylight, while they were fertile at 26 degrees C/20 degrees C (day/night) with 10 h daylight in a growth chamber. We also examined their anther structures under a light microscope. The light microscopic observation revealed that the EGMS lines showed a complete pollen abortion at the sterile growth condition while they produced normal fertile pollens at the fertile growth condition.
authors.affiliation: Department of Life Science, Graduate School of Biotechnology, Korea University, Seoul.
authors.forename: S J
authors.initials: SJ
authors.lastname: Ku
authors.forename: K H
authors.initials: KH
authors.lastname: Cho
authors.forename: Y J
authors.initials: YJ
authors.lastname: Choi
authors.forename: W K
authors.initials: WK
authors.lastname: Baek
authors.forename: S
authors.initials: S
authors.lastname: Kim
authors.forename: H S
authors.initials: HS
authors.lastname: Suh
authors.forename: Y Y
authors.initials: YY
authors.lastname: Chung
mesh_terms: D005298:Fertility / Q000235:genetics*; D006358:Hot Temperature; D012275:Oryza / Q000166:cytology / Q000235:genetics*; D017440:Photoperiod; D011058:Pollen / Q000166:cytology / Q000235:genetics