Genome-Wide Identification and Characterization of PRR Gene Family and their Diurnal Rhythmic Expression Profile in Maize

Table 2

Ka/Ks analysis and estimated divergence time for the duplicated ZmPRR paralogs.

Paralogous pairs	Ka	Ks	Ka/Ks	Purifying selection	Divergence time (Mya)	Duplicate type
ZmPRR95-1/ZmPRR95-2	0.0582	0.1715	0.3396	Yes	13.19	WGD or segmental
ZmPRR37-1/ZmPRR37-2	0.0386	0.1362	0.2835	Yes	10.48	WGD or segmental
ZmPRR37-2/ZmPRR73	0.3274	1.2088	0.2708	Yes	92.98	WGD or segmental
ZmPRR1-1/ZmPRR1-2	0.0564	0.2290	0.2463	Yes	17.61	WGD or segmental
ZmPRR59-2/ZmPRR95-2	0.7097	2.1311	0.3330	Yes	163.93	WGD or segmental