Table 3. Impact of drought stress on agro-morphological traits in pearl millet.
Trait code | Trait definition | Year | Mean | Ratio DS/WW | p-value | |
---|---|---|---|---|---|---|
WW | DS | |||||
DSFLO | Flowering date (days after sowing) | 2015 | 63.82 | 66.20 | 1.037 | 0.00389 |
2016 | 70.16 | 69.61 | 0.992 | 0.52690 | ||
STG | Staygreen (nb green leaves/total number leaves) | 2015 | 0.35 | 0.39 | 1.115 | 1.969E-07 |
2016 | 0.52 | 0.57 | 1.087 | 1.192E-18 | ||
HSP | Height of the plant | 2015 | 158.45 | 115.53 | 0.729 | 1.699E-41 |
2016 | 140.56 | 108.88 | 0.775 | 5.909E-19 | ||
Lpan | Length of the panicle | 2015 | 32.73 | 30.33 | 0.927 | 0.00701 |
2016 | 32.21 | 30.45 | 0.945 | 0.04974 | ||
Lped | Stalk length | 2015 | 27.01 | 25.26 | 0.935 | 0.00255 |
2016 | 26.09 | 22.34 | 0.856 | 1.344E-13 | ||
NFT | Number of leaves | 2015 | 17.09 | 16.10 | 0.942 | 2.845E-06 |
2016 | 17.95 | 17.81 | 0.992 | 6.154E-01 | ||
BSA | Aerial biomass | 2015 | 440.20 | 241.48 | 0.549 | 1.296E-25 |
2016 | 385.07 | 218.83 | 0.568 | 9.547E-21 | ||
PGR | Total grain weight | 2015 | 60.41 | 29.05 | 0.481 | 1.408E-17 |
2016 | 72.47 | 39.14 | 0.540 | 4.877E-20 | ||
IR | Harvest index | 2015 | 0.15 | 0.16 | 1.040 | 0.53120 |
2016 | 0.22 | 0.21 | 0.959 | 0.31683 | ||
PMG | Weight of 1000 grains | 2015 | 7.44 | 6.95 | 0.934 | 0.00143 |
2016 | 8.03 | 8.04 | 1.001 | 0.93140 | ||
NGR | Number of grains per plant | 2015 | 10121.46 | 5699.75 | 0.563 | 1.436E-14 |
2016 | 9126.03 | 4594.69 | 0.503 | 3.463E-22 |
Bold numbers correspond to significant differences (p<0,01). WW: well-watered; DS: early drought stress.