湖南杂交水稻种子生产体系的发展

Development of Hybrid Rice Seed Production System in Hunan Province

总结了湖南杂交水稻种子生产体系从“县繁、社队制种”到“地提、县繁、县社制种”再到“省提、地繁、县制”的三个发展阶段，并对每个发展阶段的起止时间、特点以及对湖南稻谷生产所起的作用进行了分析。提出“省提、省繁、规模制种”种子生产体系是杂交水稻种子生产新的发展方向。

Hunan is the birthplace of hybrid rice. The development of hybrid rice seed production system has undergone three stages. The first stage (1976～1979) is the 'County-multiplication and Commune-seed production' stage, in which the multiplication of parental seeds was conducted by the county-level agricultural research institute or seed farm in every county, while hybrid seed production was done by every commune. The second stage (1980～1982) is the 'Prefecture-purification, County-multiplication and County-or Commune-seed production' stage. In this stage, because of increasing degeneration of parental seeds, purification of parents became indispensible. In the third stage (1983～now), called 'Province-purification, Prefecture-multiplication and County-seed production' stage, a comparably perfect seed production system of hybrid rice was established and carried out. Hybrid rice seed production system has experienced a developing process from scatteration to concentration, from lower level to higher level with the yield of multiplication and hybrid seed production increased and the seed quality improved greatly, which has enhanced the rapid and sustainable development of hybrid rice. A new more centralized system called 'Province-purification, Province-multiplication and large-scale seed production' was put forword and expected to be the developing tendency in the seed production of hybrid rice.