Transcriptome Analysis of Interspecific Hybrid between Brassica napus and B. rapa Reveals Heterosis for Oil Rape Improvement

Table 1

Summary of dominance patterns of differentially expressed genes.

DGs	Number	Percentage
Additivity	1840	27
Nonadditivity	4946	72.56
Others	30	0.44
High-parent dominance (HPD)	353	7.14
Low-parent dominance (LPD)	191	3.86
Overdominance (ODO)	593	11.99
Underdominance (UDO)	193	3.9
Positive partial-dominance (PPD)	1635	33.06
Negative partial-dominance (NPD)	1981	40.5
Total	6816

Additivity: F1 ≈ 1/2(P1 + P2); nonadditivity: F1 > 1/2(P1 + P2) or F1 < 1/2(P1 + P2). High-parent dominance (HPD): F1 ≈ P1 > P2 or F1 ≈ P2 < P1; low-parent dominance (LPD): F1 ≈ P1 < P2 or F1 ≈ P2 < P1; overdominance (ODO): F1 > P1 and F1 > P2; underdominance (UDO): F1 < P1 and F1 < P2.