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棉花学报  2009 

南疆不同类型海岛棉品种棉铃内同化物积累与分配特性的研究

DOI: 1002-7807(2009)03-0218-06, PP. 218-223

Keywords: 海岛棉,棉铃,同化物积累分配,产量

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Abstract:

以南疆主栽海岛棉品种为材料,分析不同花期铃部器官同化物质积累动态、再度分配及吐絮棉铃的分配率。结果表明同化物积累随时间呈“S”型曲线,用Logistic方程进行拟合均达到显著水平。同化物积累达最大值所需时间表现为棉纤维>种子>铃壳,新海28比优系193提前5~10d;同化物再度分配随着花期的推移,铃壳率不断增大,子重率、经济系数、子棉/壳重逐渐减小。铃壳对子棉增重的贡献率,新海28大于优系193;棉铃的胚珠数、种子数、结子效率随开花时间的推移逐步增大,新海28单铃子房胚珠数、单铃种子数比优系193略低,而结子效率稍高;新海28具有开花早,铃期短,铃壳率小,结子效率高,铃壳同化物质的再分配对子棉增重的贡献率、子重率、经济系数、子棉与干重的比值均大于优系193,这是其早开花、早结铃、早吐絮及丰产的遗传生理基础。

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