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采用 1 973～ 1 996年黄淮棉区棉花品种区域试验的历史资料来研究我国黄淮棉区棉花品种产量组分的改良对产量的影响。结果表明 ,产量从750 kg· hm- 2 提高到 1 2 0 0 kg· hm- 2 主要是通过株铃数的改良来实现的 ;产量从 1 2 0 0 kg· hm- 2 提高到 1 42 5kg· hm- 2 主要是通过衣分的提高来实现 ;铃重的改良对产量的提高贡献不大。当前育种策略和选择重点是在一定铃重的基础上 ,加强对株铃数和衣分的选择
Using the historical data of regional trials of cotton cultivars in the Huanghuai cotton area from 1973 to 1996, we studied the effects of the improvement of yield components on the cotton varieties in the Huang-Huai area. The results showed that the yield was increased from 750 kg · hm-2 to 12 000 kg · hm-2 mainly through the improvement of plant bolls; the yield was increased from 1200 kg · hm-2 to 1242 kg · Hm-2 is mainly achieved through the improvement of the lint percentage. The improvement of boll weight does not contribute much to the increase of yield. The current breeding strategy and selection of key points is based on a certain boll weight, strengthen the number of bolls and clothing selection