The impact of vernalization requirement, photoperiod sensitivity and earliness per se on grain protein content of bread wheat (Triticum aestivum L.)
The impact of vernalization requirement, photoperiod sensitivity and earliness per se on grain protein content of bread wheat (Triticum aestivum L.)
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DOI：
10.1007/s10681-008-9671-z
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发表时间：
2008-02
期刊：
影响因子：
1.9
通讯作者：
M. Herndl;J. White;S. Graeff;W. Claupein
中科院分区：
文献类型：
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作者：
M. Herndl;J. White;S. Graeff;W. Claupein
在小麦中，较短的开花前阶段通常与增加的籽粒蛋白质含量（GPC）但降低的籽粒产量相关。花前发育的品种差异主要由春化要求、光周期敏感性和早熟性本身决定。本研究探讨了这些性状的品种差异是否影响GPC，特别是这三个性状是否可以部分解释GPC的基因型×环境互作。采用CSM-Cropsim-CERES-Wheat模型对24个冬小麦品种和5个春小麦品种以及12个在德国两年多试验的冬小麦品种进行了特征分析。模型参数P1 V表示品种春化要求，P1 D表示光周期反应，P123表示早熟性。IWWPN数据集的协方差分析表明，约7%的GPC的变化是由品种解释，另外7%归因于品种与地区，地点和年份的相互作用。P1 V、P1 D和P123均对GPC有影响，但影响程度因地区、地点和年份而异。例如，对于两个区域，P1 V对GPC的影响随着纬度的增加而减小。利用来自德国的数据进行的通径分析证实，GPC随开花时间的提前而增加，这受到P1 D和P123的影响。缺乏P1 V在这个位置的影响，大概是由于所有品种被完全春化。研究结果表明，改善GPC的努力可以针对特定群体的环境，这应该减少环境对GPC的巨大影响。
In wheat, a shorter pre-anthesis phase is often associated with increased grain protein content (GPC) but decreased grain yield. Cultivar differences in pre-anthesis development are mainly determined by vernalization requirement, photoperiod sensitivity and earliness per se. This research examines whether cultivar differences in these traits affect GPC, especially whether the three traits can partially explain genotype × environment interactions for GPC. Twenty-four winter wheat and five spring wheat cultivars selected from International Winter Wheat Performance Nursery (IWWPN) trials and 12 winter wheats tested over 2 years in Germany were characterized using the CSM-Cropsim-CERES-Wheat model. The model parameter P1V specifies the cultivar vernalization requirement, P1D the photoperiod response, and P123earliness per se. Covariance analyses of the IWWPN dataset indicated that about 7% of variation in GPC was explained by cultivar, with another 7% attributable to interactions of cultivar with region, site and year. P1V, P1D and P123all influenced GPC, but their effects varied with region, site and year. For example, for two regions, the effect of P1V on GPC decreased with latitude. Path analyses using the data from Germany confirmed that GPC increased with earlier anthesis, which was influenced by P1D and P123. Lack of an effect of P1V at this location presumably was due to all cultivars being completely vernalized. The results indicate that efforts to improve GPC could target the three traits to specific populations of environments, which should reduce the large influence of environment on GPC.