引进甘蔗种质资源主要工艺性状演进趋势分析

Genetic advance analysis of the main industrial quality traits for imported sugarcane germplasm

以67份甘蔗种质为材料,根据育成年份(10~20年为时间界点)划分为5个改良世代,基于大田试验,2017年11月至2018年3月,每月采集1次样本,选择甘蔗锤度、甘蔗蔗糖分、蔗汁蔗糖分、甘蔗纤维分、蔗汁简纯度等5个重要工艺性状指标,对其进行世代内、世代间方差分析及工艺品质与世代间的回归分析。方差分析结果表明:相同世代内各种质工艺性状指标存在显著差异,变异系数介于2%~20%;不同世代间各工艺性状指标间均存在显著差异,其中甘蔗蔗糖分、蔗汁蔗糖分和蔗汁简纯度3个工艺性状指标存在着世代和月份的交互作用。回归分析结果表明:世代与品质性状之间存在显著2次回归关系,随着改良世代的推进,甘蔗锤度、甘蔗蔗糖分和蔗汁蔗糖分等主要工艺性状显著提高,以第5世代的为最高,第2代的最低。

The studied 67 sugarcane germplasms sampled every month from November of 2017 to March of 2018,were divided into 5 generations according to the growing years(10-20 years as the time boundary).Based on the field experiment,the five important industrial traits,brix,sucrose content,sugar content,fiber content and simple purity of sugarcane juice,were subject to variance analysis and regression analysis.The results showed that significant differences existed among all kinds of quality traits in the same generation with the coefficient of variation 2%-20%as well as the differences among the traits in different generations.The sugarcane sucrose,sugarcane juice sucrose and sugarcane juice simple purity had the interaction of different generations and months.The results of regression analysis showed that there were two significant regression relationships between generations and quality traits.With the improvement of generations,the brix,sucrose content and juice sucrose content were significantly improved,with the summit at the fifth generation and the bottom at the second generation.