马铃薯种质资源主要品质性状分析与评价  

Main Quality Traits Analysis and Evaluation of Potato Germplasms

作　　者：颉瑞霞 张小川 吴林科 郭志乾 张国辉 余帮强 Xie Ruixia;Zhang Xiaochuan;Wu Linke;Guo Zhiqian;Zhang Guohui;Yu Bangqiang(Guyuan Branch of Ningxia Academy of Agriculture and Forestry Sciences,Guyuan,756000)

机构地区：[1]宁夏农林科学院固原分院,固原756000

出　　处：《分子植物育种》2020年第20期6828-6836,共9页Molecular Plant Breeding

基　　金：宁夏农业特色优势产业新品种选育专项(2019NYYZ01-1);宁夏一二三产业融合发展项目(YES-16-0101);宁夏农林科学院农业科技创新项目(DWX2018034);国家马铃薯产业技术体系(CARS-10)共同资助。

摘　　要：为了提高马铃薯种质资源的利用效率,促进专用型品种育种,本研究对国内外172份马铃薯资源的主要品质性状进行了测定分析。结果表明:(1) 172份资源中还原糖变异系数最大(66.67%),变幅为0.093~1.11 g/100 g;粗蛋白变异系数次之(21.11%),变幅为1.12~3.57 g/100 g;干物质变异系数最小(12.85%),变幅为14.6%~30.6%。(2)相关分析结果显示,还原糖与干物质、粗蛋白和粗淀粉呈极显著负相关性,与维生素C呈显著负相关性,其他性状间呈极显著正相关性。(3)主成分分析结果表明,干物质(47.98%)、还原糖(26.42%)、维生素C (16.54%)和粗蛋白(6.81%) 4个因子的累积贡献率达到了97.75%。(4)在欧式距离D=23时,把172份种质资源分为4类,结合群体品质特性,评价筛选出第Ⅰ类高干物质和高维生素C群体,第Ⅵ类高粗蛋白群体。本研究结果有助于提高马铃薯种质资源利用效率并加快品质育种。To improve the utilization efficiency of potato germplasm resources and to promote the breeding of specialized varieties, the quality traits of 172 potato germplasms were analyzed. The results indicated that:(1) The variation coefficient of reducing sugar was the largest(66.67%), and the range was 0.093~1.11 g/100 g;the variation coefficient of crude protein was larger(21.11%), and the range was 1.12~3.57 g/100 g;the variation coefficient of dry matter was the smallest(12.85%), and the range was 14.6%~30.6%.(2) The results of correlation analysis showed that it was very significantly negative correlation between reducing sugar and dry matter, crude protein and crude starch, a significantly negative correlation with vitamin C, and other quality traits were significantly positively correlated.(3) Principal component analysis showed that the cumulative contribution rate of the four factors reached97.75%, the four factors are as follows: followed dry matter(47.98%), reducing sugar(26.42%), vitamin C(16.54%)and crude protein(6.81%).(4) 172 germplasm resources were divided into 4 categories at the Euclide distance D=23,Combining with the quality characteristics of the population, The ClassⅠ with high dry matter and high vitamin C,class Ⅳ of high crude protein were screened out. The results of this study will be beneficial to improve the utilization efficiency of potato germplasm and accelerate quality breeding.

关 键 词：马铃薯 种质资源 品质性状 主成分分析 聚类分析 

分 类 号：S532[农业科学—作物学]