The changes of kernel nutritive components and seed vigor in F1 seeds of sh2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) ...The changes of kernel nutritive components and seed vigor in F1 seeds of sh2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages.展开更多
选取新疆种植的10种杏仁作为研究对象,通过必需氨基酸指数(essential amino acid index,EAAI)和氨基酸比值系数分(score of ratio coefficient of amino acid,SRC)等化学指标对杏仁蛋白质营养价值进行系统分析;并在主成分分析和聚类分...选取新疆种植的10种杏仁作为研究对象,通过必需氨基酸指数(essential amino acid index,EAAI)和氨基酸比值系数分(score of ratio coefficient of amino acid,SRC)等化学指标对杏仁蛋白质营养价值进行系统分析;并在主成分分析和聚类分析的基础上对10种杏仁的品质进行综合评价。结果表明杏仁总氨基酸质量分数在16.7%~23.12%之间,必需氨基酸与总氨基酸比值在32.18%~33.75%之间,EAAI值>100,SRC值<100,且品种间差异较大,其中限制性氨基酸为含硫氨基酸和赖氨酸。通过主成分分析提取3个主成分,累计方差贡献率为90.295%,由每个主成分贡献率重新建立的综合评价模型较好地反映了杏仁蛋白质的综合信息,并将10种杏仁按品质排名。聚类分析将10种杏仁分为4类,结果与主成分分析一致。展开更多
基金supported by the National Natural Science Foundation of China (No. 30370911)Education Department of Zhejiang Prov-ince, China (No. 20070147)
文摘The changes of kernel nutritive components and seed vigor in F1 seeds of sh2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages.
文摘选取新疆种植的10种杏仁作为研究对象,通过必需氨基酸指数(essential amino acid index,EAAI)和氨基酸比值系数分(score of ratio coefficient of amino acid,SRC)等化学指标对杏仁蛋白质营养价值进行系统分析;并在主成分分析和聚类分析的基础上对10种杏仁的品质进行综合评价。结果表明杏仁总氨基酸质量分数在16.7%~23.12%之间,必需氨基酸与总氨基酸比值在32.18%~33.75%之间,EAAI值>100,SRC值<100,且品种间差异较大,其中限制性氨基酸为含硫氨基酸和赖氨酸。通过主成分分析提取3个主成分,累计方差贡献率为90.295%,由每个主成分贡献率重新建立的综合评价模型较好地反映了杏仁蛋白质的综合信息,并将10种杏仁按品质排名。聚类分析将10种杏仁分为4类,结果与主成分分析一致。