小麦HMW-GS与戊聚糖含量及其组分的相关分析和聚类分析  

Correlation Between HMW-GS,the Pentosan and Their Components and Their Cluster Analysis in Different Wheat Varieties

作　　者：李春喜[1] 张蓓蓓[1] 邵云[1] 姜丽娜[1] 李丹丹[1] 

机构地区：[1]河南师范大学生命科学学院,河南新乡453007

出　　处：《华北农学报》2006年第5期33-38,共6页Acta Agriculturae Boreali-Sinica

基　　金：河南省杰出青年科学基金项目(04120001700);国家粮食丰产科技工程河南课题资助(2004BA520A06)

摘　　要：分析了21个不同小麦品种的HMW_GS组成,并测定了各品种戊聚糖及其组分的含量。根据亚基评分对不同小麦品种HMW_GS等位基因位点变异和亚基组合类型与戊聚糖、各组分和组分比值进行了相关分析,又根据评分和总戊聚糖含量对这21个品种进行了聚类。结果表明,供试材料的HMW_GS组合类型有11余种;不同品种间,阿拉伯糖变异大,木糖变异小,戊聚糖含量和各组分均有较大差异;大部分指标与Glu_1位点有显著的负相关,其中Glu_D1位点大于另外2个位点;N,7,17+18和2+12亚基对戊聚糖及各组分含量影响较大,烘烤品质较好的亚基1和5+10对戊聚糖及各组分含量的贡献则较小;含有亚基组合(N,7,2+12)的大部分戊聚糖指标含量均较高;聚类分析中把这些品种分为4类,第1类可以作为饲料生产,第3类可以作为食品工业生产。The composition of the HMW-GS, pentosan and pentosan components in different wheat varieties were analyzed. Based on the scores of these subunits in several wheat varieties, the correlations between the composition of HMW-GS, subunit combination types, pentosan, pentosan components and theirt ratio were analyzed. The results showed that 11 types of HMW-GS were detected. Among different varieties, the variation was great for Ara, but small for Xyl, and the pentosan and its components were very different, with big coefficient of variability. Significant inverse correlation was found between most of indexes and Glu-1 loci, among which the effect on Glu-D1 was bigger than on other two loci. N, 7, 17 ＋ 18 and 2 ＋ 12 subunits had great influence on pentosan and its components. But the good subunits for baking quality, such as 1 and 5 ＋ 10, had little contribution to pentosan and its components. The content of pentosan and its components was higher in varieties with subunits N, 7 and 2 ＋ 12. Finally, the 21 varieties were clustered into 4 groups according to their HMW-GS scores and pentosan content. The first group of varieties could be used to feed production, and the third group as raw material of food industry.

关 键 词：小麦 HMW—GS 戊聚糖 相关 聚类 

分 类 号：S512.01[农业科学—作物学]