Table 1.

Identification of significantly different lipid metabolites in diploid and tetraploid groups based on the criteria of VIP > 1 and p < 0.01.

Lipid Compounds	B-2x vs. B-4x			Y-2x vs. Y-4x
	VIP	p	Trend	VIP	p	Trend
γ-Linolenic acid	2.13	1.85 × 10−3	up	1.11	8.38 × 10−4	up
Punicic acid	2.22	4.29 × 10−3	down	1.55	4.28 × 10−4	down
LysoPC (15:0)	1.28	3.73 × 10−4	up	1.25	3.94 × 10−4	up
LysoPC (16:1)	1.67	8.71 × 10−4	up	1.76	3.73 × 10−4	up
LysoPC (18:1)	2.50	9.17 × 10−4	up	2.31	1.15 × 10−3	up
LysoPC (18:3)	5.62	4.16 × 10−5	up	2.82	1.97 × 10−3	up
LysoPC (18:3) (2n isomer)	5.48	2.69 × 10−4	up	3.02	2.54 × 10−3	up
4-Hydroxysphinganine	1.07	6.91 × 10−4	down	1.82	1.74 × 10−3	up
Choline alfoscerate	1.34	6.37 × 10−3	up	1.39	7.18 × 10−4	up
MAG (18:2)	5.34	2.33 × 10−4	up	4.83	9.12 × 10−5	up
MAG (18:3) isomer1	2.26	1.89 × 10−4	up	1.08	1.13 × 10−4	up

Note: the “up” and “down” represent higher and lower abundances of lipid metabolites in tetraploid rice compared with diploid rice, respectively.