Welcome to Acta Agronomica Sinica,

Acta Agron Sin ›› 2013, Vol. 39 ›› Issue (09): 1569-1575.doi: 10.3724/SP.J.1006.2013.01569

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

How to Tackle Insecurity Problems in Seed Production of Two-line Hybrid Rice

LEI Dong-Yang,TANG Wen-Bang,XIE Zhi-Jian,LIU Hai,CHEN Li-Yun*   

  1. College of Agronomy, Hunan Agricultural University, Changsha 410128, China?
  • Received:2013-01-05 Revised:2013-04-22 Online:2013-09-12 Published:2013-05-22
  • Contact: 陈立云, E-mail: chenliyun996@163.com, Tel: 0731-84618625
  • About author:陈立云, E-mail: chenliyun996@163.com, Tel: 0731-84618625

Abstract:

The security problem of seed production has seriously hampered the healthy and sustainable development of two-line hybrid rice. The safty issues on seed production of two-line hybrid rice and current research situation were pointed out in this paper. The three main reasons for unsafty in seed production of two-line hybrid rice were indicated to be unsuitable site selection, high critical sterility-inducing temperature and the drift of critical temperature. In this paper, strategies and measures were put forward based on many years of practice. Selecting dual-purpose genic male sterile line with lower critical sterility-inducing temperature could minimize the risk in seed pruduction of two-line hybrid rice and scientifically selecting a suitable site and safe duration could ensure the seed production safety of two-line hybrid rice. A new idea for determining appropriate regions and periods for seed production according to the climate data together with climatic demands of the “three safe-periods” in seed production was proposed. Besides, a system of single plant selection and identification and original seed propagation with cyclic cold water was established.
foundation seed production of dual-purpose genic male sterile lines should be adopted to avoid the drift of critical sterility-inducing temperature.

Key words: Two-line hybrid rice, Dual-purpose genic male sterile line, Seed production safety

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