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Acta Agron Sin ›› 2011, Vol. 37 ›› Issue (05): 755-763.doi: 10.3724/SP.J.1006.2011.00755

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

Development and Application of a Computer-Aided Selection System for Thermo-Sensitive Genic Male Sterile Rice Multiplying Site

LIU Hai, XIAO Ying-Hui, TANG Wen-Bang, DENG Hua-Bing,CHEN Li-Yun*   

  1. Rice Research Institute, Hunan Agricultural University, Changsha 410128, China
  • Received:2010-10-08 Revised:2011-03-08 Online:2011-05-12 Published:2011-03-24
  • Contact: 陈立云, E-mail: chenliyun996@163.com, Tel: 0731-84618757

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Abstract: Great success has been achieved in the utilization of two-line hybrid rice in China. Nevertheless, the seed production of two-line hybrid rice is still a key technology that limited the extension of two-line hybrid rice on large scale. Seed multiplication of the thermo-sensitive genic male sterile (TGMS) rice, which with a narrow range of temperature for fertility restoration, is hard to be success by using the most common multiplying technologies currently. In order to improve the yield stability and security in TGMS rice multiplication, we developed a practical computer selection system for choosing an optimal multiplying site. This system using the java language was able to select suitable multiplying sites with optimal ecological factors which meet the requirement of the fertility sensitive stage (FSS) and heading-flowering stage (HFS) for TGMS rice multiplication. By using this computer-aided selection system, 24, 29, 20, 21, and 22 ecological areas were selected ,which were superior to the most common seed producing area, Sanya of Hainan province, where the suitable probabilities of FSS and HFS are 35.0%, 42.5%, 55.0%, 65.0%, and 75.0% for the TGMS with the critical temperature of 22.0℃, 22.5℃, 23.0℃, 23.5℃, and 24.0℃, respectively, while the suitable probability of the optimal multiplying site selected by the computer-aided selection system were 83%, 93%, 100%, 100%, and 100% in both FSS and HFS for TGMS with different critical temperature, respectively, showing much higher values than those in Sanya, Hainan Province. In 2010, we tried to produce the seed of C815S, a TGMS rice with the critical temperature of 22.0℃ in Baoshan, Yunnan Province selected by the computer-aided selection system. The grain yield reached 8 437.5 kg ha-1, and created the highest yield record of seed multiplication of the TGMS rice. These results suggested that the problems of unstable yield and low security for the TGMS rice seed multiplication should be solved by this computer aided selection system, and we believe the optimal multiplying site selected by the computer-aided selection system will provide a useful technical support for healthy and sustainable development in the two-line hybrid rice.

Key words: Thermo-sensitive genic male sterile rice, Multiplication site selecting, Computer program, Meteorological data

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