| 不同类型超级小麦产量构成因素及籽粒产量的通径分析 |
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| 引用本文： | 田纪春,邓志英,胡瑞波,王延训.不同类型超级小麦产量构成因素及籽粒产量的通径分析[J].作物学报,2006,32(11):1699-1705. |
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| 作者姓名： | 田纪春 邓志英 胡瑞波 王延训 |
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| 作者单位： | 山东省作物生物学重点实验室/山东农业大学小麦品质育种研究室，山东泰安271018 |
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| 基金项目： | 国家科技攻关计划;农业部财政专项基金;山东省科技厅科研基金 |
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| 摘 要： | 以8个不同类型的超级小麦新品种（系）为材料，研究了不同土壤肥力条件下3种类型超级小麦的产量构成因素变化及其对籽粒产量的相关分析和通径分析。结果表明，在高肥地力下，大穗型品种和中间型品种的产量高于多穗型品种；而中、低肥力下，多穗型品种的产量又显著高于大穗型品种。在本试验条件下，大穗型和多穗型品种的穗数、
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| 关 键 词： | 超级小麦(Triticum aestivum L.) 产量结构 相关分析 通径分析 |
| 收稿时间： | 2005-10-09 |
| 修稿时间： | 2005-12-12 |
Yield Components of Super Wheat Cultivars with Different Types and the Path Coefficient Analysis on Grain Yield |
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| TIAN Ji-Chun,DENG Zhi-Ying,HU Rui-Bo,WANG Yan-Xun.Yield Components of Super Wheat Cultivars with Different Types and the Path Coefficient Analysis on Grain Yield[J].Acta Agronomica Sinica,2006,32(11):1699-1705. |
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| Authors: | TIAN Ji-Chun DENG Zhi-Ying HU Rui-Bo WANG Yan-Xun |
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| Affiliation: | Key Laboratory of Crop Biology of Shandong Province/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai’an 271018, Shandong, China |
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| Abstract: | In order to meet the future demands for wheat consumption due to population increase and economic development,the total wheat production in China must be largely increased.Moreover,the irrigation water and the cultivated land for wheat production can not be increased.Therefore,it is very important to breed and cultivate new wheat cultivars with high yield potential.The "Super Wheat Breeding Project" funded by the Government of Shandong Province in 2001 and the Ministry of Agriculture in 2005 was carried out,and some new cultivars with yield of 9.75 t/ha were created.To grow these high-yielding cultivars optionally in wheat production,we conducted the experiments to investigate the effects of the yield components under different soil fertilizer levels,using 8 super wheat cultivars with different types.The results indicated that the grain yield of big-spike and mid-spike cultivars was higher than that of the poly-spike cultivars in high fertile soil,while the yield of the poly-spike cultivars was higher than that of the big-spike cultivars in mid and low fertile soil.Among fertile ears per hectare,grains per ear and 1000-grain weight,there were negative correlations in most cultivars with big and poly-spikes and positive correlations in mid-spike cultivars.The gain yield of all cultivars,poly-spike,mid-spike and big-spike cultivars would be increased by 15.51,13.40,16.90 and 19.34 kg respectively when the ear number was plus 10~4 per hectare promoted 10~4 ears,or 233.15,353.86,189.22 and 203.9 kg respectively when the grain number was plus 1 per ears promoted grain,or 151.08,157.61,157.05 and 147.8 kg respectively when the 1000-grain weight increased 1 g promoted.There were positively direct path coefficients for three yield components to yield,among them the contribution of the ears per hectare was the largest.Not only poly-spike but also big-spike cultivars depended on sufficient ears to achieve high yield.The indirect path coefficients were negative or positive in big-spike and poly-spike cultivars.But in mid-spike cultivars,the indirect path coefficients were all positive,indicating the coordinative and balanced development and the potential of increment for three yield components.Therefore,it is suggested to grow the poly-spike cultivars in middle and infertile soils and the big-spike cultivars in fertile soil.The mid-spike cultivar for super wheat breeding in the future should be aroused more attention. |
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| Keywords: | Super wheat(Triticum aestivum L ) Yield component Correlation analysis Path coefficient analysis |
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