Principal Component Analysis of Primary Agronomic Characters and Comprehensive Evaluation on Drought Resistance of 48 Winter Wheat Cultivars
Li Su
Jiang Hongming
Gong Dechen
Sun Nina
Sun Xiaohui
Li Linzhi
Abstract：This experiment used 48 wheat varieties with different drought resistance as materials .Nine-teen indexes were investigated in non -watered and well -watered field plots with the same soil conditions , such as flag leaf area , spike length , peduncle length , distance of spike and leaves , relative water content of flag leaf, water loss rate of cutting flag leaf , plant height, number of spikes per unit area , photosynthetic rate, transpiration rate , stomata conductance , intercellular CO 2 concentration , and water use efficiency . The drought resistance coefficient ( DRC) of each index was calculated and employed as the measurement index of drought resistance .The results showed that the 19 indexes could be integrated into 8 independent comprehen-sive components through the principal component analysis .The value of comprehensive indexes were calculat-ed, and the drought resistance of the varieties in local area was comprehensively evaluated by membership function method .Under the non-watered condition in Yantai , Luohan 13 showed higher drought resistance , and Yunhan 22-33 , Luohan 11 , Luohan 9 , Yannong 0428 , Shi 4185 , Yunhan 618 , Yanzhong 13 , Yan 1213 , Cangmai 6005 , Luohan 8 , Heng 4399 , Chang 6359 , Hengguan 136 , Hengyou 18 , Luohan 7 and Yan-nong 21 showed moderate drought resistance.These results provided references for selecting germplasms to cul -tivate drought -resistant wheat varieties in field.
Keywords：WheatDrought resistancePrincipal component analysisComprehensive evaluation
Publication Date：2014-07-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 25-30 )