红糖加工型甘蔗种质资源评价与筛选方法的建立

优良的甘蔗原料是生产高品质红糖的基础,筛选营养价值丰富的甘蔗种质资源,是选育红糖加工型甘蔗品种的基础。本研究以全国广泛种植、当前普遍用于红糖加工以及历史上较早应用于制作红糖等具有代表性的16份甘蔗种质为试验材料,通过分析蔗汁的蛋白质、总游离氨基酸、总多酚、蔗糖、还原糖、灰分、氯化物、胶体含量等营养、品质指标,采用因子分析、聚类分析、灰色多维综合评估等方法,建立了红糖加工型甘蔗种质资源评价与筛选方法,对16份甘蔗种质的营养价值综合评价得分进行排序。试验结果显示:不同参试甘蔗种质营养及品质指标间存在显著差异,选三、闽糖69-421、ROC22所含蛋白质、氨基酸的均值在所有材料中位居前列,灰分含量适中,可作为红糖加工型甘蔗种质进行应用;兼顾红糖生产需求和甘蔗营养成分含量,综合评价排序前5的种质依次为选三、闽糖69-421、云蔗05-51、ROC22和川糖61-408,是红糖加工型甘蔗种质的首选材料。

Evaluation and Screening Method of Sugarcane Germplasm Resources for Brown Sugar Production

The production of high quality brown sugar largely depends on the quality of sugarcane.Breeding for sugarcane varieties specifically used for producing brown sugar might be benefited from the sugarcane germplasm resources with rich nutrients.This study was conducted based on 16 representative sugarcane germplasm varieties,which were cultivated widely in China,or often used for the brown sugar production industries at present or in the past.By quantifying the nutrition and quality related traits such as protein,total free amino acid,total polyphenol,sucrose,reducing sugar,ash content,chloride and colloid content of sugarcane juice,we applied the factor analysis,cluster analysis and grey multidimensional degree comprehensive analysis to evaluate and screen the sugarcane germplasm resources suitable for the brown sugar production.The results showed that significant differences in the nutrition and quality indexes among different sugarcane germplasms.Three varieties including Triton,Mintang 69-421 and ROC22,which were detected with the highest contents on protein and amino acids,a moderate ash content,were qualified for the brown sugar production industry.Considering the demand for the brown sugar production and the nutrient content,five varieties including Triton,Mintang 69-421,Yunzhe 05-51,ROC22 and Chuantang 61-408,have been proposed as the elite germplasm resources in sugarcane breeding.