中国水稻科学

• 研究报告 •    下一篇

水稻实用光温敏核不育系培矮64S不育性稳定化研究

廖伏明; 袁隆平; 杨益善   

  1. 国家杂交水稻工程技术研究中心,湖南 长沙 410125
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-01-10 发布日期:2001-01-10

Sterility Purification of the Photo thermo Sensitive Genic Male Sterile Rice Line Pei′ai64S

LIAO Fu-ming; YUAN Long-ping; YANG Yi-shan   

  1. (China National Hybrid Rice Research & Development Center; Changsha 410125; China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-01-10 Published:2001-01-10

摘要: 在人工气候室的人控光温条件下,通过1997~1999年3年22.0~23.0℃的低温处理,对水稻实用光温敏核不育系培矮64S进行了育性稳定化研究。结果表明:1)在人工气候室的低温条件下,采用“株系(再)鉴定、(再)筛选单株”的方法,对稳定高世代光温敏核不育系培矮64S的不育性是可行的,并筛选出套袋自交结实率和花粉不育度两级水平均已稳定的3个株系9862、103-1和103-2,而且其不育起点温度已降至22.5℃,比原始株系降低了近1℃。2)现有高世代光温敏核不育系培矮64S仍然存在育性的不稳定性,表现在受低温影响后其后代不同株系间花粉不育度和套袋自交结实率存在明显差异,说明对现有高世代光温敏核不育系的育性提纯很有必要。

关键词: 水稻, 光温敏核不育系, 低温, 稳定性, 不育性

Abstract: The studies on purifying the sterility of Pei′ai64S, a practical photo thermo sensitive genic male sterile (PTGMS) line in rice, were conducted under the low temperature treatments of 22.0-23.0℃ in phytotron during 1997 to 1999. The results showed that it is feasible to purify the sterility of the PTGMS line Pei′ai64S in highly advanced generation under the low temperature conditions in phytotron. Three lines (9862, 103-1 and 103-2) have been purified in sterility at levels of both pollen sterility and bagged seed set. Moreover, the critical sterility inducing temperature of these three lines has been lowered to 22.5℃, about 1.0℃ lower than that of the original Pei′ai64S. The original PTGMS line Pei′ai64S in highly advanced generation still exists instability in sterility, which is indicated by the remarkable difference in pollen sterility and bagged seed set among its different lines under lower temperature conditions. Therefore, it is necessary to further purify the existing PTGMS lines of high generations in sterility.

Key words: rice, photo thermo sensitive genic male sterile line, low temperature, purification, sterility