Table 2.

The top ten DG-enriched metabolic pathways in the three hybrid rice combinations.

Overall rank a	Metabolic pathway b	LY2163		LY2186		LYP9
		p-value c	Rank d	p-value c	Rank d	p-value c	Rank d
1	Carbon fixation	5.37 × 10−3	1	2.36 × 10−6	1	1.03 × 10−4	1
2	Flavonoid biosynthesis	0.185	3	0.192	4	0.116	3
3	Metabolism of xenobiotics by cytochrome P450	0.224	4	0.151	3	0.266	8
4	Photosynthesis	0.045	2	0.493	13	0.056	2
5	Reductive carboxylate cycle (CO2 fixation)	0.514	6	0.258	6	0.284	10
6	Oxidative phosphorylation	0.595	10	0.062	2	0.659	26
7	Glycolysis/Gluconeogenesis	0.779	17	0.414	10	0.345	11
8	Tricarboxylic acid (TCA) cycle	0.341	5	0.312	9	0.665	28
9	Starch and sucrose metabolism	0.755	16	0.297	8	0.632	23
10	Streptomycin biosynthesis	0.857	26	0.561	17	0.129	4

^aThe overall rank is rank of the average of the individual pathway ranks for the three hybrid combinations;

^bmetabolic pathway analysis was based on MicroArray Data Interface for Biological Annotation (MADIBA) [33];

^cthe p-value is provided by Fisher’s exact test; p < 0.05 was considered statistically significant;

^drank indicates the significance of the pathway in each hybrid combination.