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以17个甘蔗家系为研究对象,对各家系的株高、茎径、锤度、丛有效茎、丛重、锤重6个经济性状进行遗传参数分析,采用多性状综合选择指数法对该家系群体进行综合评价。结果表明:家系在株高、茎径、锤度、丛有效茎、丛重和锤重均达到极显著差异,6个性状的遗传力都较高(0.68~0.97);株高的遗传变异系数(14.25%)最大,锤度(4.12%)最小;通过综合选择指数、优良度和遗传增益评价出2个优良家系,粤糖00-236×赣蔗75-65和云蔗94-375×CP72-2086。
Seventeen sugarcane families were used as the research object to analyze the genetic parameters of six economic traits such as plant height, stem diameter, brix, plexus effective weight, plexus weight and weight in each family. The comprehensive index of polygamy Family group comprehensive evaluation. The results showed that there were extremely significant differences in plant height, stem diameter, brix, plexus weight, plexus weight and weight of the pedigrees, and the heritability of the six traits was high (0.68-0.97). The genetic variation coefficient (14.25%) and the brix (4.12%) were the lowest. Two elite pedigrees, Y00-236 × Gan sugarcane 75-65 and Yunxian 94-375 × CP72 were evaluated by comprehensive selection index, excellentness and genetic gain -2086.