The Genetic Structure of Wild Orobanche cumana Wallr. (Orobanchaceae) Populations in Eastern Bulgaria Reflects Introgressions from Weedy Populations

Table 6

Number of emerged Orobanche cumana shoots per sunflower plant (mean ± standard deviation) in the evaluation of O. cumana populations CUMBUL-1, CUMBUL-2, and CUMBUL-4, collected in Bulgaria on Artemisia maritima, CUMBUL-5_1, collected in Bulgaria on Anthemis arvensis, OC-9, OC-11, and OC-13, collected in Bulgaria on cultivated sunflower, and OC-88, collected in Spain on cultivated sunflower, on six sunflower lines with different levels of genetic resistance, conducted in pots in 2008^a. The O. cumana race to which each sunflower line is expected to be resistant (if any) is given in parenthesis.

	B117^b	J8281 (B)	AC03-1589 (C)	S1358 (D)	P-1380 (E)	P96 (F)
CUMBUL-1	17.7±6.3^bc	2.6±2.4^ab	1.1±1.2^a	NE^c	0^a	0
CUMBUL-2	20.6±3.2^c	1.3±1.7^ab	0.5±1.1^a	2.0±1.4^a	0^a	0
CUMBUL-4	10.9±7.1^ab	0.1±0.4^a	0.6±0.7^a	NE	0^a	0
CUMBUL-5_1	12.6±6.7^ab	2.0±1.1^ab	5.1±2.6^b	NE	0.4±0.7^a	0
OC-9	13.8±7.4^abc	3.0±2.5^ab	0.5±0.8^a	0.8±1.0^a	0^a	0
OC-11	8.6±5.3^a	2.5±2.1^ab	0.2±0.4^a	0.7±0.8^a	0^a	0
OC-13	14.3±7.9^abc	4.1±1.9^b	1.1±1.1^a	1.2±0.8^a	0^a	0
OC-88	9.9±6.9^a	16.6±6.5^c	1.6±1.3^a	1.2±1.2^a	6.9±4.3^b	0

aEight pots per each combination of sunflower cultivar and O. cumana population.
^bMeans with different letters for each sunflower cultivar differ significantly (𝑃<0.05).
^cNE = not evaluated.