Table 1. Location of isolation, genetic cluster assignment, and races of Fusarium oxysporum f. sp. niveum isolates from watermelon in Georgia and Florida.

Isolate	Location	Genetic cluster1	Disease incidence (%)2				Race Identified3
			Sugar Baby	Charleston Gray	Calhoun Gray	PI-296341-FR
F1-2a	Berrien, GA	8	100	100	100	90	3
F1-4 a	Berrien, GA	8	100	100	70	0	2
F1-5a a	Berrien, GA	8	100	100	100	70	3
F1-5b a	Berrien, GA	8	100	100	100	70	3
F1-7 a	Berrien, GA	8	100	100	70	0	2
F1-8 a	Berrien, GA	8	100	100	100	80	3
F1-9 a	Berrien, GA	8	100	100	100	80	3
F1-12 a	Berrien, GA	8	100	100	90	0	2
F1-13 a	Berrien, GA	8	100	90	90	0	2
F1-14 a	Berrien, GA	8	100	100	90	0	2
F1-15 a	Berrien, GA	8	100	100	90	0	2
F1-16 a	Berrien, GA	8	95	5	0	0	0
F1-17 a	Berrien, GA	8	100	100	70	0	2
F1-18 a	Berrien, GA	8	100	100	100	90	3
F1-19 a	Berrien, GA	8	100	100	100	80	3
F1-20 a	Berrien, GA	8	100	100	80	0	2
F2-3 b	Berrien, GA	8	100	100	90	0	2
F2-6 b	Berrien, GA	8	100	100	80	0	2
F2-10 b	Berrien, GA	8	100	100	90	0	2
F2-28 b	Berrien, GA	8	100	100	100	70	3
F2-34 b	Berrien, GA	8	95	100	90	85	3
F2-39 b	Berrien, GA	8	100	100	100	70	3
F3-1 c	Cook, GA	8	100	100	80	0	2
F3-2 c	Cook, GA	8	100	100	100	70	3
F4-3 d	Cook, GA	8	100	100	100	90	3
F3-7 c	Cook, GA	8	100	100	100	80	3
F3-20 c	Cook, GA	8	100	100	100	80	3
F3-22 c	Cook, GA	8	100	100	100	90	3
F3-23 c	Cook, GA	8	100	100	100	80	3
F3-24 c	Cook, GA	8	100	100	100	80	3
F3-26 c	Cook, GA	8	100	100	100	90	3
F3-29 c	Cook, GA	8	95	100	80	85	3
F3-34 c	Cook, GA	8	100	100	100	80	3
122e e	Tift, GA	8	100	100	90	0	2
122g e	Tift, GA	8	90	85	90	10	2
12105b e	Tift, GA	8	85	85	90	0	2
13–101	FL	8	100	100	100	90	3
13–119	FL	8	100	100	90	95	3
13–134	FL	8	100	100	90	75	3
13–124	FL	7	95	85	85	90	3
12065 e	Tift, GA	6	90	95	95	10	2
122a e	Tift, GA	5	90	85	80	0	2
12126b e	Tift, GA	4	80	80	80	80	3
F2-18 b	Berrien, GA	3	100	0	0	0	0
13–115	FL	2	90	80	100	70	3
123a e	Tift, GA	1	90	0	0	0	0
12105a e	Tift, GA	1	90	90	90	70	3
13–102	FL	1	85	80	95	85	3
13–111	FL	1	85	90	85	80	3
13–112	FL	1	100	100	80	0	2
13–113	FL	1	90	85	90	90	3
13–114	FL	1	100	90	90	90	3
13–117	FL	1	100	100	80	0	2
13–118	FL	1	100	100	90	0	2
13–132	FL	1	90	90	80	85	3
13–133	FL	1	90	80	80	10	2
13–135	FL	1	90	90	100	80	3
13–136	FL	1	100	100	70	0	2
13–159	FL	1	95	100	85	5	2
*Race 0	GA		95	0	0	0	0
*Race1	GA		90	85	0	0	1
*Race 2	SC		95	90	90	0	2

¹Genetic cluster assignment was determined by the use of simple sequence repeat markers.

²Mean disease incidence was recorded as the number of seedlings showing Fusarium wilt symptoms to the total number of seedlings planted (n = 10 seedlings/isolate/cultivar/experiment).

³Seedlings with ≥33% wilt incidence was considered as susceptible whereas seedlings with < 33% wilt incidence was considered as resistant (Martyn and Bruton, 1989).

^a-eIsolates with same letters indicate isolates collected from same field.

Berrien, GA; Cook, GA and FL isolates were collected in 2013; Tift, GA isolates were collected in 2012.

*Reference isolates used for race 0, race 1 and race 2.