Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (24): 6-17.doi: 10.11924/j.issn.1000-6850.casb2020-0602

Special Issue: 小麦

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The Principal Component Analysis and SOM Cluster Analysis Identifying Salt Tolerance of Wheat Varieties at Germination Stage

Han Liping(), Guo Weiwei, Han Xiaofan, Li Ximei, Wang Huifang, Zhang Yumei(), Qiu Hongwei()   

  1. College of Agronomy, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dryland Farming Technology, Qingdao Agricultural University/Shandong Engineering Research Center of Germplasm Innovation and Utilization of Salt-tolerant Crops, Qingdao Agricultural University, Qingdao Shandong 266109
  • Received:2020-10-28 Revised:2021-02-19 Online:2021-08-25 Published:2021-08-27
  • Contact: Zhang Yumei,Qiu Hongwei E-mail:847289560@qq.com;zhangcui2003@163.com;183248006@qq.com

Abstract:

The aims are to study the salt tolerance of different wheat varieties during the germination period, and provide a rapid and accurate identification method and a theoretical basis for the identification of salt tolerance in the germination period of wheat. In this study, we used 40 winter wheat varieties as test materials and studied the effects of salt stress on morphological indices of these wheat varieties through principal component analysis (PCA) and neural network self-organizing mapping (SOM) clustering analysis. The results of principal component analysis show that germination potential, germination rate, the maximum root length, the first leaf length and coleoptile length are the largest loads under PCA. According to the results of SOM cluster analysis, four wheat varieties, including ‘Dekang 961’, belong to high salt tolerance; fourteen wheat varieties, including ‘Jimai 22’, belong to salt tolerance; sixteen wheat varieties, such as ‘Jimai 20’, belong to medium salt tolerance, and six wheat varieties, such as ‘Lumai 21’, belong to salt sensitivity. Germination potential, germination rate, the maximum root length, first leaf length and coleoptile length could be used as the main evaluation indexes for screening salt tolerance of wheat at germination stage, and it is more scientific and convenient to identify salt tolerance of wheat at germination stage by combining principal component analysis and SOM clustering analysis method.

Key words: wheat, germination stage, salt tolerance, principal component analysis, SOM cluster analysis

CLC Number: