Table 1. Non-additively expressed miRNAs in the maize hybrid Yuyu22 and its parental inbred lines.
Non-additive miRNA type | Total number of non-additive miRNAs | ||||||
+ +a | +b | + −c | Dd | −e | − −f | ||
miRNA families | 1 | 1 | 4 | 7 | 4 | 14 | 21 |
miRNA members | 4 | 6 | 13 | 20 | 28 | 37 | 107* |
Note: a + +: Extremely high parental expression, the difference of expression amounts between hybrid and high expression parental line was beyond the threshold 10%;
+: High parental expression, the difference of expression amounts between hybrid and high expression parental line was below the threshold 10%;
+ −: additive expression, the difference of expression amounts between hybrid and mid-parental values was below the threshold 10%;
D: Different from additivity (mid-parent value), not belonging to any of the other classes, the difference of the expression amounts between hybrid and parental lines and the difference between hybrid and mid-parental value were both indefinable when using 10% as the threshold;
−: Low parental expression, the difference of expression amounts between hybrid and low expression parental line was below the threshold 10%;
− −: Extremely low parental expression, the difference of expression amounts between hybrid and low expression parental line was beyond the threshold 10%;
: miR156k was defined both as + − and −.