Cytological observation of two environmental genic male-sterile lines of rice.
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.
Ku
S J
SJ
Department of Life Science, Graduate School of Biotechnology, Korea University, Seoul.
Cho
K H
KH
Choi
Y J
YJ
Baek
W K
WK
Kim
S
S
Suh
H S
HS
Chung
Y Y
YY
D005298:Fertility / Q000235:genetics*; D006358:Hot Temperature; D012275:Oryza / Q000166:cytology / Q000235:genetics*; D017440:Photoperiod; D011058:Pollen / Q000166:cytology / Q000235:genetics