Journal
RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
Volume 55, Issue 5, Pages 694-698Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1021443708050142
Keywords
Oryza sativa; photoperiod sensitivity male sterility; fertility; photoperiod; temperature; pollen
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Funding
- Hunan Science Foundation [06JJ50033]
- science key programs of Hunan education department [06A034]
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The aim of this work was to develop a photoperiod-sensitive male sterile rice with stable sterility. We developed Changguang S, an indica rice strain, by using a short critical day length. Differences in the fertility responses of Changguang S strain pollen to temperature and photoperiod under natural and controlled conditions were studied. The results showed that Changguang S strain exhibited stable sterility under long-day and low-temperature conditions (22 degrees C, 15 days). The stability of sterility was significantly higher than that of other such rice strains, Nongken 58S and 7001S. The critical photoperiod for inducing male sterility in Changguang S was 13 h or shorter, and its duration was significantly shorter than that required for rice strains Nongken 58S and 7001S. It is suggested that Changguang S is a typical photoperiod-sensitive male sterile rice strain with a shorter critical day length and a lower critical temperature. It is promising to apply this strain to two-line hybrid rice production.
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