中国水稻品种推广趋向分析

对1986-2003年全国水稻主要推广品种的分析表明,"七五"以来中国水稻品种推广趋向表现为:品种数量明显增加,单个品种年均推广面积显著下降,大面积推广品种逐渐减少,主栽品种跨省推广比例及更新速度基本稳定.对常规稻与杂交稻品种推广情况作了比较,对水稻品种推广与水稻育种、种业发展等问题进行了讨论.

The Extension Trend of Rice Varieties in China

Based on the analysis on the extension of main rice varieties (>6.7 thousand hectares) from 1986 to 2003, the extension trend of rice varieties in China indicated that the number of varieties for extending increased significantly, the average extension acreage of rice varieties decreased significantly, the varieties with large extension acreage (>~666.7 thousand hectares) became less and less, the percentage with cross-province extension and renewal speed of dominant rice varieties (>66.7 thousand hectares) kept basically steady. The comparison on the variety extension between inbred rice and hybrid rice was done and some problems about rice variety extension, rice breeding and the development of seed industry were discussed.