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Table 1 Experimental trials, crop management strategies and nitrogen nutrition indexes at the bolting stage (BBCH 50)

From: Genetic basis of nitrogen use efficiency and yield stability across environments in winter rapeseed

Population Location Year Trial acronym Number of individuals ∆N fertilization (a) (kg N/ha) Mineral N soil content under plants at the end of winter (kg N/ha) NNI (b) N stress qualification
WOSR-92 Le Rheu 2008-2009 LR09 92 70 17 0.96 (0.03) - 1.31 (0.13) No N stress
2009-2010 LR10 92 70 17.1 0.97 (NA) - 1.17 (0.001) No N stress
WOSR-69 Châteauroux 2013-2014 Ch14 69 100 - 0.81 (0.19) - 1.08 (0.01) Moderate
Dijon 2013-2014 Dij14 69 80 30.3 0.81 (0.02) - 0.93 (0.01) Moderate
Prémesques 2013-2014 Pre14 69 90 15.4 0.67 (0.03) - 1.02 (0.01) Intense
Selommes 2013-2014 Sel14 69 80 - -  
Verpillères 2013-2014 Ver14 69 60 - 0.87 (0.02) - 1.14 (0.05) Moderate
AM-DH Le Rheu 2010-2011 LR11 112 90 11 0.97 (0.18) - 0.93 (0.07) No N stress
2011-2012 LR12 112 80 30.3 0.96 (0.19) - 1.08 (0.27) No N stress
2012-2013 LR13 112 80 52.5 0.81 (0.08) - 1.12 (0.05) Moderate
Mondonville 2010-2011 Md11 112 90 14.1 0.84 (0.08) - 1.08 (0.09) Moderate
Dijon 2012-2013 Dij13 75 60 40.6 0.98 (0.06) - 1.04 (0.04) No N stress
DK-DH Le Rheu 2010-2011 LR11 75 80 11 0.97 (0.18) - 0.93 (0.07) No N stress
Mondonville 2010-2011 Md11 75 90 14.1 0.84 (0.08) - 1.08 (0.09) Moderate
  1. (a)∆N fertilization corresponds to the difference between the N fertilization under the high (N2) and low (N1) conditions
  2. (b)The nitrogen nutrition index measured at the bolting stage (BBCH 50) under low (N1, left) or high (N2, right) N nutrition conditions. The standard errors are indicated in brackets
  3. '-': not available