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Table 1 Trait list, abbreviations and description

From: Genome-wide association mapping in a diverse spring barley collection reveals the presence of QTL hotspots and candidate genes for root and shoot architecture traits at seedling stage

Trait Abbreviation++ Description
  Non-Stress Stress Unit  
Root dry weight+ Rdwc Rdws mg Roots were dried at 70 °C for 48 h and their weights were recorded using a weighing balance (Sartorius AC 1215, Germany).
Shoot dry weight+ Sdwc Sdws mg Shoots were dried at 70 °C for 48 h and their weights were recorded using a weighing balance (Sartorius AC 1215, Germany).
Total plant biomass+ Byc Bys mg Dry weights of shoots and roots were summed to get biomass/ biological yield of the seedlings.
Root to shoot ratio+ Rsc Rss ratio It is measured as ratio of Root to Shoot dry weights.
Maximum root length+ Rlc Rls cm Using scaled ruler maximum root lengths/ root length was measured.
Shoot length+ Slc Sls cm Scaled ruler was used to record the shoot length of the seedlings.
Number of main roots Nmrc Nmrs No. Based on images of the scanned roots number of roots were recorded.
Average root thickness Rthc Rths mm Based on images of the scanned roots average root thickness were recorded.
Total root length Trlc Trls mm All roots were considered in recording the total root length based on images of the scanned roots.
Total root volume Trvc Trvs mm3 All roots were considered in recording the total root volume based on images of the scanned roots.
Drought susceptibility index DSI   It is calculated using the formula of Fisher and Maurer (1978) using Biological yield of control and stress see more details in Adel-Ghani et al. (2015).
  1. +These traits were scored previously by Abdel-Ghani et al. (2015). ++C and S denotes the control and stress treatments