Table 1.

Location of Populations Used in This Experiment and the Number of Individuals Sampled in Various Assays

County, State	Population		NFC	NQ-PCR	NRT-PCR	Latitude (N), Longitude (W)
El Paso Co., Colorado	ElP-A	Helianthus annuus	30	8	2	38.8679, 104.6832
	ElP-HP1	Hybrid population	27	10	4	38.9116, 104.6276
	ElP-P	H. petioralis	24	8	2	38.9115, 104.6031
Keith Co., Nebraska	Kei-A	H. annuus	20	9	2	41.3268, 101.7258
	Kei-HP1	Hybrid population	30	8	4	41.2507, 101.6828
	Kei-HP2	Hybrid population	29	6	—	41.1638, 101.6890
	Kei-P	H. petioralis	24	10	2	41.2578, 101.6942
Sandoval Co., New Mexico	San-A	H. annuus	29	10	2	36.1474, 107.2641
	San-HP1	Hybrid population	26	9	4	36.1098, 107.1767
	San-P	H. petioralis	25	8	2	36.1861, 107.3717
Quay Co., New Mexico	Qu-A	H. annuus	25	7	2	35.1104, 103.2942
	Qu-HP1	Hybrid population	27	8	4	35.1266, 103.2440
	Qu-HP2	Hybrid population	27	9	—	35.1140, 103.2611
	Qu-HP3	Hybrid population	26	9	—	35.1140, 103.2479
	Qu-P	H. petioralis	30	8	2	35.1551, 103.2434
Barton Co., Kansas	Bar-A	H. annuus	25	11	2	38.4155, 98.6568
	Bar-HP1	Hybrid population	30	20	3	38.3552, 98.6636
	Bar-P	H. petioralis	27	11	2	38.3414, 98.6641

NOTE.—N_FC, Number of individuals for which estimates of genome size were determined by flow cytometry; N_Q-PCR, number of individuals for which estimates of Ty3/gypsy and Ty1/copia abundance were determined by Q-PCR. These individuals also were genotyped at 22 SSR loci to determine hybrid index scores; N_RT-PCR, number of individuals sampled in transcriptional assays of Ty3/gypsy and Ty1/copia sequences.