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作者	单位
杭雅文,武威,张莀茜,范婷，李春燕,周桂生,丁锦峰，朱敏，郭文善,朱新开	(1.江苏省作物遗传生理重点实验室/江苏省作物栽培生理重点实验室/扬州大学小麦研究中心,江苏扬州 225009；2.江苏省粮食作物现代产业技术协同创新中心，扬州大学，江苏扬州 225009；3.教育部农业与农产品安全国际合作联合实验室，江苏扬州 225009）

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中文摘要:

为完善弱筋小麦的品质评价体系、筛选出有代表性的品质指标、明确弱筋小麦的优质栽培技术，本研究以弱筋小麦宁麦13为试验材料，设置不同栽培密度和氮肥运筹组合，通过主成分分析、相关性分析和聚类分析等方法对17个品质指标进行了分析。结果表明，稳定时间、弱化度和粉质质量指数的变异系数较大，遗传性状不稳定。溶剂保持力（solvent retention capacity profile，SRC）与品质指标间相关性显著，其中，水SRC值与饼干直径呈显著负相关，碳酸钠SRC值与蛋白质含量呈显著正相关，蔗糖SRC值与出粉率和硬度呈极显著正相关。通过主成分分析，提取了6个特征值大于1的主成分，代表了85.47%的品质信息，水SRC值、蔗糖SRC值、出粉率、稳定时间、硬度、弱化度、粉质质量指数、饼干厚度和饼干延展系数可以作为弱筋小麦品质评价的重要指标。对主成分分析筛选的重要指标进行聚类分析，在距离15处将被测指标分为3类，品质性状较优的处理主要在第一类；筛选出指标符合国标弱筋小麦品质的处理，适期播种条件下，密度225万·hm^-2或300万·hm^-2、施氮量240 kg·hm^-2、氮肥运筹7∶1∶2∶0为本试验条件下宁麦13适宜栽培组合。

英文摘要:

In order to optimize the quality evaluation system for weak-gluten wheat,screen out representative quality traits,and develop high-quality cultivation modes for weak-gluten wheat,Ningmai 13 was planted with different density and fertilizer combinations. Seventeen quality traits were investigated,and principal component analysis,correlation analysis and cluster analysis were further performed. The variation coefficients of stability time,softening degree and farinograph quality were high,indicating that the genetic traits of quality were not stable. Solvent retention capacity profile(SRC) had significant correlation with quality traits. The water SRC was negatively correlated with cookie width(P<0.05). The Na₂CO₃ SRC was positively correlated with the content of protein. The sucrose SRC was positively correlated with flour yield and hardness index(P<0.01). Through principal component analysis,six principal components with eigenvalue higher than 1 were extracted and they contained 85.47% of all the quality information. The water SRC,Na₂CO₃ SRC,flour yield,stability time,hardness index,softening degree,farinograph quality number,cookie thickness and cookie spread ratio were screened as the key parameters for evaluating the quality of weak-gluten wheat. Three categories were clustered in the key quality traits at a separation distance of 15. The treatments with good quality traits were mainly found in the first category. Two treatments with the density at 2.25 million·hm^-2 or 3.00 million·hm^-2,nitrogen rate at 240 kg·hm^-2,and nitrogen ratio at 7∶1∶2∶0 were screened as the best high-quality cultivation modes.The quality traits under both modes can meet the national standard of weak gluten wheat.

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