Table 2. Summary of Genes Regulating NUE in Crop Plants.

Gene Name	Target Plant	Physiological Trait Affected	References
NAC2-5A	Wheat	Root growth, yield	(He et al., 2015)
BZIP60	Wheat	LR branching, N uptake, yield	(Yang, 2019)
NAC42	Rice	Plant height, NUE, yield	(Tang et al., 2019)
NAC7	Maize	Senescence, biomass, yield	(Zhang et al., 2019)
AMT1.1	Rice	N uptake, yield	(Ranathunge et al., 2014)
NRT2.3b	Rice	Growth, NUE, yield	(Fan et al., 2016)
NRT2.1	Rice	NUE, yield	(Chen et al., 2016)
ARE1	Rice	Senescence, NUE, yield	(Wang et al., 2018b)
GRF4	Rice	Biomass, yield	(Li et al., 2018)
NRT1.1B	Rice	NUE, yield	(Hu et al., 2015)
NFYA	Wheat	Yield	(Qu, 2015)
PTR9	Rice	Biomass, yield	(Fang, 2013)
BT1/BT2	Rice, Arabidopsis	Yield, NUE	(Araus et al., 2016)
NAR2.1	Rice	NUE, yield	(Chen, 2017)
GS1	Rice	NUE, yield	(Brauer, 2011)
DOF1	Wheat, sorghum	Biomass, yield	(Peña, 2017)
AAP1	Pea	Biomass, NUE, yield	(Perchlik and Tegeder, 2017)
DEP1	Rice	Biomass, yield	(Sun et al., 2014a)
NR2	Rice	Yield, NUE	(Gao et al., 2019)