Table 2. Summary statistics of the diagnostic ability of HB-2 in four environments.

Environment	N	P value	Accuracy (%)	Positive predictive value (PF)	Negative predictive value (SF)	Sensitivity	Specificity
MI 2011	212	< 2.2E-16	80.7	0.77	0.85	0.86	0.76
MI 2012	222	3.2E-07	64.0	0.45	0.88	0.82	0.56
OR 2011	217	0.0297	69.6	0.53	0.9	0.86	0.61
OR 2012	227	1.3E-14	70.5	0.47	0.99	0.98	0.6

Abbreviations: HB, haploblock; PF, perpetual flowering; MI, Michigan; OR, Oregon; SF, seasonal flowering.

The diagnostic test was interpreted as predicting SF if the diplotype is BBB|BBB. Diplotype association with flowering habit was assessed using Pearson’s chi-squared test of independence with Yates’s correction.