Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (6): 1235-1242.DOI: 10.3969/j.issn.1004-1524.2023.06.01

• Crop Science • Previous Articles     Next Articles

Comprehensive evaluation of waterlogging tolerance of 18 wheat varieties at jointing stage

YU Guihong(), SONG Guicheng, ZHANG Peng, WANG Huadun, FAN Xiangyun   

  1. Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
  • Received:2022-07-22 Online:2023-06-25 Published:2023-07-04

Abstract:

In order to explore the waterlogging tolerance of wheat at jointing stage, the waterlogging tolerance of 18 wheat varieties (lines) were identified and evaluated by pot cultivation waterlogging method. The results showed that the sensitivity of 11 wheat traits to waterlogging stress during jointing stage was as follows: yield per plant>number of effective panicle>number of green leaves per main shoot>number of tillers>leaf length>chlorophyll content>total weight of main spike>1 000-grain weight>plant height>length of main spike>spikelet number per main spike. The 11 investigated traits were transformed into 4 comprehensive indexes by using principal component analysis, and the cumulative contribution rate of the 4 comprehensive indexes was 82.66%. The membership function value of the 4 comprehensive indexes calculated, the comprehensive evaluation values (D) of waterlogging resistance of 18 varieties were distributed between 0.14-0.78 with average value 0.55 and coefficient of variation 25.40%. Through cluster analysis by using K-means method, 18 varieties were divided into 5 categories: high resistance (1 variety), resistance (6 varieties), moderate resistance (5 varieties), sensitivity (5 varieties) and high sensitivity (1 variety). There were 7 varieties including Ningmai23, Ningmai21, Emai803, Huamai18P10, Ningmai13, Ning1710 and Luomai163 whose waterlogging tolerance reached the level of resistance or above. The D value of waterlogging tolerance had significant positive correlation with the waterlogging tolerance coefficient of 5 traits including yield per plant, chlorophyll content, plant height, total weight of main spike and number of green leaves per main shoot at P<0.01 level.

Key words: wheat, waterlogging tolerance, jointing stage, waterlogging tolerance coefficient

CLC Number: