不同来源品种在长江下游麦区的溶剂保持力特性及相关分析

Characteristics of Solvent Retention Capacity(SRC) of Different Varieties Planted in the Low Yangtze Wheat Region and Aanalysis on Their Correlations

为给弱筋小麦育种提供指导,收集了195份来自不同麦区的小麦品种,分别于2008和2009年秋播种植于江苏扬州,并对收获种子进行了4种SRC(包括水、乳酸、碳酸钠和蔗糖SRC)、硬度及蛋白质含量的检测。结果表明,4种SRC、硬度和蛋白质含量在品种间及年度间差异均达极显著水平。两年度均以水SRC含量最低,分别为87.27%和77.54%;乳酸SRC次低,分别为95.99%和84.17%;蔗糖SRC和碳酸钠SRC年度间互有高低,其平均值均大于100%。4种SRC值间存在极显著正相关,其中2009年乳酸SRC和碳酸钠SRC之间的相关系数达0.607,2010年乳酸SRC和水SRC之间的相关系数达0.675。硬度与水、乳酸、碳酸钠等3种SRC及"面筋性能指数"存在极显著正相关,其中与乳酸SRC的两年相关系数分别高达0.721和0.779。蛋白质含量与乳酸、蔗糖、碳酸钠等3种SRC相关极显著但相关系数较小。从参试品种中筛选出了SRC两年均表现较低的品种皖麦50、扬辐麦3046、宁麦8号、豫麦49、扬麦19等,在育种中可更好地加以利用。在育种中主要可利用水SRC和乳酸SRC以及硬度检测来提高弱筋小麦育种效率。

To evaluate the characteristics of wheat varieties from different regions in Solvent Retention Capacity （SRC） and utilize the resources with low SRC value in wheat breeding, the four indexes of SRC including water SRC, lactic acid （LA） SRC, sodium carbonate （NaC）SRC and sucrose（Suc） SRC, hardness and protein content of 195 varieties from different wheat regions were investigated with samples grown in year 2009 and 2010 in Yangzhou, Jiangsu Province. The results indicated that there were significant differences in the four indexes of SRC, hardness and protein content among those wheat varieties. In year 2009 and 2010, the water SRC had the lowest value, the average was 87. 27% and 77.54%, respectively. The LA SRC had the lower value, the average was 95.99% and 84.17% , respectively. The average of NaC SRC and Suc SRC both was more than 100% and fluctuated with different years. A very significant correlation was found among four indexes of SRC in two years, of which the correlation coefficient between IrA SRC and NaC SRC was 0. 607, whereas the correlation coefficient between the IrA SRC and Water SRC was 0. 675. The hardness had significant and positive correlations with Water SRC, LA SRC,NaC SRC and the ＇gluten performance index＇, among which the LA SRC had the highest correlation with hardness and the correlation coefficients were 0. 721 and 0. 779, respectively. The protein content had significant and positive correlations with LA SRC, Suc SRC and NaC SRC, but with lower correlation coefficients. Some varieties such as Wanmai 50,Yang- fumai 3046, Ningmai 9, Yumai 49 and Yangmai19 with low water SRC values in two years could be benefit in soft wheat breeding, and the water SRC, lactic acid SRC and hardness could be effective in- dexes to soft wheat breeding.