Fertility response to photoperiod and temperature in indica photoperiod-sensitive male sterile rice |
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Authors: | M Z Liang L J Ou L X Deng S Luan L B Chen |
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Institution: | (1) College of Life Science, Hunan Normal University, Changsha, 410081, China |
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Abstract: | 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°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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Keywords: | Oryza sativa photoperiod sensitivity male sterility fertility photoperiod temperature pollen |
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