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Table 2 Treatment means across RILs and for each parent for leaf gas-exchange, vegetative, and reproductive traits for genotypes of B. rapa within the well-watered (WW) and drought (DR) treatments. Standard errors are indicated in parentheses

From: Genotypic variation in biomass allocation in response to field drought has a greater affect on yield than gas exchange or phenology

Trait WW RIL treatment mean (SE) WW IMB211 parent mean WW r500 parent mean DR RIL treatment mean (SE) DR IMB211 parent mean DR r500 parent mean
A (μmol m-2 s-1) 27.50 (2.85) 25.09 28.40 26.52 (2.33) 25.09 27.72
Fv'/Fm' 0.45 (0.02) 0.47 0.48 0.44 (0.02) 0.46 0.45
gs (mol m-2 s-1) 0.43 (0.04) 0.36 0.42 0.37 (0.03) 0.32 0.39
W g 69.33 (1.38) 74.08 70.12 76.86 (1.52) 77.0 75.09
δ13C -28.03 (0.28) NA NA -27.87 (0.29) NA NA
LMA (g m-2) 58.97 (0.91) 57.55 55.71 62.04 (0.97) 59.0 61.11
Above-ground biomass (g) 19.32 (2.21) 9.77 67.48 10.09 (1.00) 5.66 40.61
Below-ground biomass (g) 0.54 (0.06) 0.30 2.78 0.37 (0.03) 0.35 1.60
Root:Shoot ratio 0.029 (0.00) 0.032 0.036 0.04 (0.002) 0.063 0.041
Leaf area (cm2) 14.99 (1.07) 13.11 48.48 11.89 (0.47) 11.55 20.89
Plant height (cm) 39.46 (1.23) 26.87 72.85 33.16 (1.31) 24.76 60.95
Fruit production (number of fruits) 179.83 (12.72) 143.03 306.78 93.06 (7.35) 75.60 198.67
Days to flowering 34.91 (0.34) 31.63 38.91 34.51 (0.28) 31.38 39.48
  1. A photosynthetic rate, Fv'/Fm' chlorophyll fluorescence in light, g s stomatal conductance, W g intrinsic water use efficiency (A/g s ), δ 13 C carbon isotope composition, LMA leaf mass per area