Table 2.

Discriminating compounds, of known flavour and low odour threshold, in Apo and IR64 grown in irrigated and drought treatments

First axis		Second axis		Third axis
Compound	Loading	Compound	Loading	Compound	Loading
Limonene	−0.391	Methylbenzoate	−0.406	1,2,3,4-Tetramethyl benzene	0.434
n-Propylbenzene	−0.372	Camphene	−0.401	Tridecane	0.425
1-Ethyl-3-methylbenzene	−0.358	Benzonitrile	−0.379	Phenethylacetate	0.366
Indole	0.338	Tetradecane	0.368	Benzophenone	−0.361
2-Heptanone	−0.297	Phenol	−0.334	3-Methylbenzaldehyde	0.262
2-Heptenal	−0.249	Isopropyldodecanoate	−0.227	Pentadecanoic acid	0.243
Hexanal	−0.233	Decanal	−0.200	Isomethyl ionone	0.225
1-Hepten-3-ol	−0.231	Benzaldehyde	−0.199	Caryophyllene	−0.200
2-Pentylfuran	−0.216	Octanal	−0.194	Naphthalene	0.199
Methylstyrene	−0.201	Heptanal	−0.193	o-Cymene	0.194
Ethyl octanoate	−0.175	1-Propene-1-thiol	0.167	Benzaldehyde	−0.161
2-Propylfuran	−0.173	Acetophenone	−0.102	1-Hexanol	0.139
α-Phellandrene	−0.168	4-Hydroxy-4-methyl-2-pentanone	−0.096	α-Farnesene	0.122
o-Cymene	−0.118	2-Pentylfuran	0.093	2-Methylheptane	0.073
β-Ocimene	−0.107	2-Methylheptane	0.091	2-Ethylhexanal	−0.045
2-Octenal	−0.071	Carvone	−0.087	p-Xylene	−0.041
2-Butylfuran	−0.027	Hexanal	0.065	4-Hydroxy-4-methyl-2-pentanone	0.036
1,3-Dimethylbenzene	−0.014	2,4-Hexadien-1-ol	−0.042	Undecane	0.028
Undecane	−0.009	Pentadecanoic acid	−0.009	Phenol	0.019
α-Pinene	−0.001	Indole	0.007	α-Phellandrene	0.006

These compounds have been extracted from each of the three axes of a sparse Partial Least Squares-Discriminant Analysis.