以甘蓝型黄籽油菜冷榨浸出粕为材料,测定了蛋白质、粗纤维、木质素、可溶性糖和多酚含量,并对黄籽油菜制备浓缩蛋白条件进行了初步探索。结果表明,未脱壳的黄籽油菜饼粕具有蛋白质含量高、抗营养物质含量低的特点,采用乙醇脱糖即可制备浓缩蛋白。黄籽浸提粕的蛋白质含量达50.31%,可溶性糖含量为5.90%,粗纤维和木质素分别为4.40%和1.05%;黑籽粕蛋白质含量为38.38%,可溶性糖含量为5.43%,粗纤维和木质素分别为10%和6.10%。采用多因素正交试验对乙醇浸提工艺条件进行优化,方差分析表明乙醇浓度和浸提温度对蛋白质含量的影响分别达显著和极显著水平。在乙醇浓度95%、浸提温度70℃、料液比1∶7、浸提5次、每次20 m in的条件下,获得的甘蓝型黄籽浓缩蛋白产品蛋白含量达60.07%,赖氨酸等必需氨基酸含量显著提高,氨基酸总量达49.51%,各氨基酸比例均匀,硫甙脱除率达74%,并且浓缩蛋白的溶解度、氮溶解性、吸水性、吸油性、乳化性、起泡性与泡沫稳定性等功能特性良好。
Cross combinations from six rapeseed cultivars and lines were evaluated under waterlogging stress condition in order to understand the genetic mechanism of waterlogging tolerance of Brassica napus L.and provide reasonable improvement programs.There were six germination traits investigated on combining ability and heritability using complete diallel crossing method designed for 30 combinations from those six cultivars and lines.The traits included relative root length,stem length,fresh weight per plant,survival rate,electrical conductivity,and vigor index.After flooding treatment,the six traits of parents and F1 were analyzed.The general combining ability(GCA) and special combining ability(SCA) of germination traits were analyzed using Griffing I method.Among 30 cross combinations,the GCA was significantly different among six waterlogging resistance traits.The SCA of these traits was significantly different except the SCA of electrical conductivity.As a representative trait of waterlogging tolerance in rapeseed,relative vigor index had the highest narrow heritability and relatively low broad heritability.The cultivars Zhongshuang 9 and P79 had higher tolerance potential to waterlogging stress.It can be concluded that combining ability and genetic effects of relative vigor index during germination stage could be used to identify the waterlogging tolerance of rapeseed in breeding program.
