A comparison of the mineral element content of 70 different varieties of pear fruit ( Pyrus ussuriensis ) in China

PeerJ

article

Chang Liu¹  Honglian Li³  Aihua Ren⁴  Guoyou Chen⁵  Wanjun Ye⁶  Yuxia Wu¹  Ping Ma¹  Wenquan Yu²  Tianming He¹ 

[1] College of Horticulture, Xinjiang Agricultural University;Mudanjiang Branch, Heilongjiang Academy of Agricultural Sciences/Key Laboratory of Fruit Breeding and Cultivation in Cold Areas;Institute of Pomology, Jilin Academy of Agricultural Sciences;Horticulture Branch, Heilongjiang Academy of Agricultural Sciences;Quality and Safety Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences/Inspection and Testing Center for Quality of Cereals and Their Products ,(Harbin), Ministry of Agriculture and Rural Affairs;Heilongjiang Academy of Agricultural Sciences;Bayin Guoleng Vocational and Technical College

关键词: Correlation analysis;    Mineral element;    Peel;    Pulp;    Pyrus ussuriensis Maxim.;   

DOI  :  10.7717/peerj.15328

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Background Pyrus ussuriensis (Maxim.) is a unique pear tree that grows in northern China. The tree has strong cold resistance and can withstand low temperatures from −30 °C to −35 °C. Due to its unique growth environment, its fruit is rich in minerals and has much higher levels of minerals such as K, Ca and Mg than the fruit of Pyrus pyrifolia (Nakai.) and Pyrus bretschneideri (Rehd.) on the market, and many say the ripe fruit tastes better than other varieties. A comprehensive analysis of the characteristics of mineral elements in the fruits of different varieties of P. ussuriensis will provide a valuable scientific basis for the selection, breeding and production of consumer varieties of P. ussuriensis, and provide a more complete understanding of nutritional differences between fruit varieties. Methods In this study, 70 varieties of wild, domesticated and cultivated species of P. ussuriensis from different geographical locations were compared. Targeting four main mineral elements and eight trace mineral elements contained in the fruit, the differences in mineral content in the peel and pulp of different varieties of P. ussuriensis were analyzed, compared and classified using modern microwave digestion ICP-MS. Results The mineral elements in the fruit of P. ussuriensis Ca in the pulp. The mineral element content of wild fruit varieties was higher than that of cultivated and domesticated varieties. Correlation analysis results showed that there was a significant positive correlation between K, P and Cu in both the peel and pulp of P. ussuriensis fruit (P < 0. 01). Cluster analysis results showed that the 70 varieties of P. ussuriensis could be divided into three slightly different categories according to the content of the peel or pulp. According to the contents of the fruit peel, these varieties were divided into: (1) varieties with high Na, Mg, P, K, Fe and Zn content, (2) varieties with high Ca content and (3) varieties with medium levels of mineral elements. According to the fruit pulp content, these varieties were divided into: (1) varieties with high Mg, P and K content, (2) varieties with low mineral element content, and (3) varieties with high Na and Ca content. The comprehensive analysis of relevant mineral element content factors showed that ‘SSHMSL,’ ‘QYL,’ ‘SWSL’ and ‘ZLTSL-3’ were the best varieties, and could be used as the focus varieties of future breeding programs for large-scale pear production.

【 授权许可】

CC BY