| 热胁迫下春小麦品种产量性状耐热性差异及相关分析 |
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| 引用本文： | 董建力,李树华,王敬东,惠红霞.热胁迫下春小麦品种产量性状耐热性差异及相关分析[J].西北农业学报,2008,17(2):70-73. |
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| 作者姓名： | 董建力 李树华 王敬东 惠红霞 |
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| 作者单位： | 宁夏农林科学院农业生物技术研究中心,银川,750002 |
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| 摘 要： | 以宁夏灌区大面积种植的小麦品种(系)为供试材料(35个),在小麦灌浆后期通过人工升温鉴定耐热性,结果表明,不同基因型热胁迫处理与正常环境相比千粒重降低幅度在1.2%~30.2%间,穗粒重降低幅度在0.5%~40.0%间。不同基因型间的耐热性存在较大差异,千粒重感热指数在0.09~2.86间,有3个材料千粒重感热指数S<0.2,表现较强的耐热性。耐热材料(S<1,n=17)的平均千粒重、穗粒重、穗粒数较热敏感材料(S>1,n=18)分别低0.43g、0.22g和2.19粒。晚熟材料较中熟材料的丰产性好、耐热性差。相关分析表明,千粒重感热指数与热胁迫下的千粒重呈极显著负相关。千粒重感热指数与穗粒重感热指数、千粒重几何平均产量与穗粒重几何平均产量间均呈极显著正相关。
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| 关 键 词： | 春小麦 热胁迫 耐热性 感热指数 几何平均产量 产量性状 |
| 文章编号： | 1004-1389(2008)02-0070-04 |
| 收稿时间： | 2007/9/12 0:00:00 |
| 修稿时间： | 2007年9月12日 |
Correlation Analysis and Difference in Heat Tolerance with Yield Trait of Different Spring Wheat under Heat Stress |
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| DONG Jian-li,LI Shu-hu,WANG Jing-dong and HUI Hong-xia.Correlation Analysis and Difference in Heat Tolerance with Yield Trait of Different Spring Wheat under Heat Stress[J].Acta Agriculturae Boreali-occidentalis Sinica,2008,17(2):70-73. |
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| Authors: | DONG Jian-li LI Shu-hu WANG Jing-dong and HUI Hong-xia |
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| Institution: | Agricultural Bio-Technology Center of Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;Agricultural Bio-Technology Center of Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;Agricultural Bio-Technology Center of Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;Agricultural Bio-Technology Center of Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China |
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| Abstract: | 35 varieties(lines) of wheat which were planted in irrigation area of Ningxia were identified heat tolerance by manual temperature rise in late filing.The results showed 1 000-kernel weight of different wheat genotypes were reduced from 1.2% to 30.2% under heat stress to compare with normal environment,Kernel weight per spike of wheat varieties were reduced from 0.5% to 40%.There is significant difference of heat tolerance in different wheat genotypes,the range of heat susceptibility index of 1000-kernel weight is from 0.09 to 2.86,three wheat materials showed higher heat tolerance.Mean of 1000-grain weight,kernel weight per spike and kernels of per spike of heat tolerance wheat materials(S<1,n=17) are lower separately by 0.43 g,0.22 g and 2.19 kernels than heat susceptibility wheat varieties(S>1,n=18).Serotinous materials are better in yield trait and worse in heat tolerance.Correlation analysis of result suggested that negative correlation was highly significant between heat susceptibility indexes of 1000-grain weight with 1000-grain weight under heat stress. Between susceptibility heat index of 1000-grain weight and spike-grain weight,and between geometric mean yield per plant of 1000-grain weight and spike-grain weight all showed significant positive correlation. |
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| Keywords: | Spring wheat Heat stress Heat tolerance Heat susceptibility index Geometric mean yield Yield trait |
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