Table 2.

Comparison of genetic diversity generated by 946 SNP markers between landraces and cultivars.

	Sample Size	No. of Polymorphic Marker	Polymorphic Rate (%)	Gene Diversity *	PIC *
Improvement status
Landrace	53	756	79.9%	0.2192 b	0.1800 b
Cultivar	97	933	98.6%	0.2310 a	0.1919 a
Time group†
Landrace	53	756	79.9%	0.2192 b	0.1800 b
OC	32	757	80.0%	0.2192 b	0.1807 b
EGR	35	728	77.0%	0.2034 c	0.1680 c
PGR	30	825	87.2%	0.2474 a	0.2039 a

^†OC-old cultivars released before 1965; EGR, cultivars released during the period of early Green Revolution (1965–1980); PGR, cultivars released during the period of post Green Revolution (1981–2009).

^*Significance was tested by the paired t test and means in each column followed by same letters was indicated by different letters at p ≤ 0.05.