Changxuan 3S, a thermo-sensitive genic male sterile （TGMS） rice line with eui gene, is derived from the TGMS rice line Pei＇ai 64S by irradiation with 350 Gy of ^60Co γ-ray. To elucidate the uppermost internode elo...Changxuan 3S, a thermo-sensitive genic male sterile （TGMS） rice line with eui gene, is derived from the TGMS rice line Pei＇ai 64S by irradiation with 350 Gy of ^60Co γ-ray. To elucidate the uppermost internode elongation of the TGMS line with eui gene, Changxuan 3S and its parent Pei＇ai 64S were used to study the effects of temperature on panicle exsertion. At 24℃, the uppermost internode of Changxuan 3S elongated the fastest from the 4^th day before flowering to 0 day （flowering）, being 2.1-fold as that of Pei＇ai 64S, whereas it elongated slowly during the 12^th day to the 4^th day before flowering and the 1^st to the 3^rd day after flowering. The uppermost internode of Changxuan 3S exserted from the flag leaf sheath at 22℃, 24℃ and 26℃, and the length of elongated uppermost internode increased with the decreasing temperatures. At 28℃, though the panicles of Changxuan 3S were still enclosed in the leaf sheath, the degree of panicle enclosure was significantly lower compared with Pei＇ai 64S. Cytological studies on Changxuan 3S showed that the uppermost internode elongation was attributed to the increase of cell number and cell elongation, and the latter was more significant. Moreover, the numbers of outermost and innermost parenchyma cells and the cell length of the uppermost internode reduced with the increasing temperatures.展开更多
In order to improve the panicle extrusion of photo- and thermo-sensitive sterile line ‘Pei＇ai 64S＇ by using elongated uppermost internode （eul） gene of the wide compatibility rice mutant ‘02428h＇, a new photo- ...In order to improve the panicle extrusion of photo- and thermo-sensitive sterile line ‘Pei＇ai 64S＇ by using elongated uppermost internode （eul） gene of the wide compatibility rice mutant ‘02428h＇, a new photo- and thermo-sensitive sterile line ‘P8hS＇ characterized with elongated uppermost internode was developed by transferring the eui gene into Pei＇ai 64S through three successive backcrossing, Compared with Pei＇ai 64S, the plant height of P8hS was 35.6 cm higher resulted from the elongation of the uppermost and the second internodes from the top. The panicle extrusion of Pei＇ai 64S was completely improved and positive effects were found on the main economic characters of P8hS and its hybrids by introducing euigene into Pei＇ai 64S.展开更多
文摘Changxuan 3S, a thermo-sensitive genic male sterile （TGMS） rice line with eui gene, is derived from the TGMS rice line Pei＇ai 64S by irradiation with 350 Gy of ^60Co γ-ray. To elucidate the uppermost internode elongation of the TGMS line with eui gene, Changxuan 3S and its parent Pei＇ai 64S were used to study the effects of temperature on panicle exsertion. At 24℃, the uppermost internode of Changxuan 3S elongated the fastest from the 4^th day before flowering to 0 day （flowering）, being 2.1-fold as that of Pei＇ai 64S, whereas it elongated slowly during the 12^th day to the 4^th day before flowering and the 1^st to the 3^rd day after flowering. The uppermost internode of Changxuan 3S exserted from the flag leaf sheath at 22℃, 24℃ and 26℃, and the length of elongated uppermost internode increased with the decreasing temperatures. At 28℃, though the panicles of Changxuan 3S were still enclosed in the leaf sheath, the degree of panicle enclosure was significantly lower compared with Pei＇ai 64S. Cytological studies on Changxuan 3S showed that the uppermost internode elongation was attributed to the increase of cell number and cell elongation, and the latter was more significant. Moreover, the numbers of outermost and innermost parenchyma cells and the cell length of the uppermost internode reduced with the increasing temperatures.
基金This paper was translated from its Chinese version in Chinese Journal of Rice Science.
文摘In order to improve the panicle extrusion of photo- and thermo-sensitive sterile line ‘Pei＇ai 64S＇ by using elongated uppermost internode （eul） gene of the wide compatibility rice mutant ‘02428h＇, a new photo- and thermo-sensitive sterile line ‘P8hS＇ characterized with elongated uppermost internode was developed by transferring the eui gene into Pei＇ai 64S through three successive backcrossing, Compared with Pei＇ai 64S, the plant height of P8hS was 35.6 cm higher resulted from the elongation of the uppermost and the second internodes from the top. The panicle extrusion of Pei＇ai 64S was completely improved and positive effects were found on the main economic characters of P8hS and its hybrids by introducing euigene into Pei＇ai 64S.
