BACKGROUND: Cold is one of the bottlenecks restricting the development of apple industry in the Northwest Loess Plateau of China. Crabapples play indispensable roles in the apple industry as excellent rootstocks and potential pollination trees. OBJECTIVE: The purpose of
this experiment was to compare the cold resistance of crabapples and Fuji and provide reference for the simple evaluation of cold resistance. MATERIALS AND METHODS: 11 crabapples and '2001Fuji' were employed as test materials. Nine physiological parameters were measured under low temperature
(0, –15, –20, –30, –35 and –40°C) treatments and the anatomical structures of the leaves were observed. Principal component analysis (PCA), regression analysis (RA) and system cluster analysis (SCA) were adopted to analyze the data of physiological parameters
and leaf anatomical structure. RESULTS: According to PCA, the cold resistance of 12 genotypes was identified and the order of cold resistance is as follows: HS, HB, HF, HY, FS, HS, XQ, XK, XL, DG, Q, and HL. Moreover, the regression equation evaluating cold resistance was obtained by
RA and 12 genotypes were divided into 4 categories by SCA. CONCLUSION: Multivariate statistical analysis methods can overcome the defects of single index evaluation. The lethal–temperature (LT50) can more accurately reflect the cold resistance of plants than other physiological
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MULTIVARIATE STATISTICAL ANALYSES;
PRINCIPAL COMPONENT ANALYSIS
Document Type: Research Article
Publication date: July 1, 2018
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CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation
The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.