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作者	单位
曹廷杰^1,2，赵虹¹，王西成¹，崔党群²，詹克慧²	（1. 河南省农业科学院小麦研究中心，河南郑州 450002； 2. 河南农业大学农学院，河南郑州 450002）

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中文摘要:

为了解河南省小麦品种主要性状的演变规律，利用近二十年河南省小麦冬水组区域试验数据，对新育成品种的主要农艺性状演变规律进行了分析。结果表明，随着品种育成年份的延后，抽穗期和成熟期呈提前趋势，株高呈降低趋势，每666.7 m²有效穗数和全生育期天数呈减少趋势，穗粒数、千粒重、灌浆时间和每666.7 m² 产量则呈增加趋势。相关分析表明，产量与千粒重、穗粒数以及灌浆时间呈极显著正相关，与抽穗期、成熟期以及全生育期呈极显著负相关，说明产量的提高主要与抽穗期提前导致灌浆时间、穗粒数以及千粒重的增加有关。文中还对今后河南省半冬性小麦品种在产量三要素、株型结构和熟期等方面的遗传改良进行了讨论。

英文摘要:

The 20 years′experimental data from Winter Wheat Group of Henan Regional Trial were used to study the evolution of main agronomic traits of semi winter wheat varieties. The results showed that, with the postpone of released year of variety, the heading date and maturation stage moved earlier, the plant height reduced, the ear number per 666.7 m² and whole growth period decreased, and the grain number per ear, 1000 kernal weight, grain filling period and grain yield per 666.7 m² increased. The correlation analysis showed that the grain yield had significant and positive correlation with 1000 kernal weight, grain number per ear and grain filling period, while had significant and negative correlation with heading stage, maturation stage and whole growth period, which indicated that the improvement of grain yield was mainly due to the increase of grain filling period, grain number per ear and 1000 kernal weight related to the moving earlier of heading time. For future genetic improvement of semi winter wheat varieties in Henan Province, the three yield elements, plant type and maturity were discussed.

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