Our QTL analyses find two genetic...

Our QTL analyses find two genetic architectures for our five traits (Fig. 3). Proportional UV pigmentation is controlled by six moderate effect QTL on six LGs that interact additively (Table 2; Supplementary Data Fig. S4). Parent ARG-1805 (USDA PI 494571) contributes positive effect alleles at four QTL, while parent ARG-1834 (USDA PI 494582) contributes positive effect alleles at the other two QTL (Table 2; Fig. S4). At two QTL the alleles interact additively (QTL 10@46·0 and 14@18·0), while the other four QTL show partial or full allelic dominance (Table 2; Fig. S4). Collectively, these QTL explain 35·2 % of the observed variance and have a total LOD score of 29·32 (Multiple QTL model F_12,298 = 5·15, P < 0·0001).

Table 2.

Open in new tab

QTL position, 95 % Bayesian credible interval, peak LOD score, per cent variance explained (PVE), the additive (a, effect of the ARG-1834 allele) and dominance (d) effects, the absolute value of the ratio of d/a, and the H. annuus genome major syntenic region (chromosome: Mb span) for each QTL for proportional UV pigmentation on the ray ligule (0–1 scale) and UV bullseye diameter, flowerhead disc diameter, ray ligule length and total flowerhead diameter (cm)

Trait	Map LG	Peak (95 % CI) (cM)	Peak LOD	PVE	a ± s.e.	d ± s.e.	d/a	Syntenic region in H. annuus
Proportional UV pigmentation	2	18·0 (12·0–23·0)	10·2	10·6	–0·027 ± 0·004	0·008 ± 0·006	0·296	Hann 15: 3·73– 65·88
	4	60·8 (59·0–73·0)	5·2	5·2	0·013 ± 0·004	0·015 ± 0·006	1·154	Hann 17: 39·20–227·19
	10	46·0 (22·0–56·0)	6·3	6·3	–0·020 ± 0·004	–0·002 ± 0·006	0·100	Hann 11: 8·40–193·72
	11	0·4 (0·0–3·0)	5·2	5·1	0·014 ± 0·004	0·014 ± 0·005	1·000	Hann 3: 50·80–143·93
	14	18·0 (12·3–27·3)	4·2	4·1	–0·016 ± 0·004	–0·001 ± 0·005	0·063	Hann 2: 2·82–176·61
	15	45·0 (40·0–52·9)	4·1	4	–0·015 ± 0·004	0·007 ± 0·005	0·467	Hann 8: 7·85–96·71
UV bullseye diameter	2	60·9 (60·0–72·1)	15	20·1	–0·530 ± 0·080	0·624 ± 0·104	1·177	Hann 6: 40·31–99·17
Flowerhead disc diameter	2	70·0 (60·6–73·1)	13·1	17·6	–0·163 ± 0·037	0·392 ± 0·054	2·405	Hann 6: 40·31–99·17
Ray ligule length	2	60·9 (56·1–72·1)	14·4	19	–0·364 ± 0·049	0·280 ± 0·063	0·769	Hann 6: 40·31–99·17
Total flowerhead diameter	2	60·6 (59·0–68·0)	16·1	21·2	–0·914 ± 0·124	0·910 ± 0·161	0·996	Hann 6: 40·31–99·17

Trait	Map LG	Peak (95 % CI) (cM)	Peak LOD	PVE	a ± s.e.	d ± s.e.	d/a	Syntenic region in H. annuus
Proportional UV pigmentation	2	18·0 (12·0–23·0)	10·2	10·6	–0·027 ± 0·004	0·008 ± 0·006	0·296	Hann 15: 3·73– 65·88
	4	60·8 (59·0–73·0)	5·2	5·2	0·013 ± 0·004	0·015 ± 0·006	1·154	Hann 17: 39·20–227·19
	10	46·0 (22·0–56·0)	6·3	6·3	–0·020 ± 0·004	–0·002 ± 0·006	0·100	Hann 11: 8·40–193·72
	11	0·4 (0·0–3·0)	5·2	5·1	0·014 ± 0·004	0·014 ± 0·005	1·000	Hann 3: 50·80–143·93
	14	18·0 (12·3–27·3)	4·2	4·1	–0·016 ± 0·004	–0·001 ± 0·005	0·063	Hann 2: 2·82–176·61
	15	45·0 (40·0–52·9)	4·1	4	–0·015 ± 0·004	0·007 ± 0·005	0·467	Hann 8: 7·85–96·71
UV bullseye diameter	2	60·9 (60·0–72·1)	15	20·1	–0·530 ± 0·080	0·624 ± 0·104	1·177	Hann 6: 40·31–99·17
Flowerhead disc diameter	2	70·0 (60·6–73·1)	13·1	17·6	–0·163 ± 0·037	0·392 ± 0·054	2·405	Hann 6: 40·31–99·17
Ray ligule length	2	60·9 (56·1–72·1)	14·4	19	–0·364 ± 0·049	0·280 ± 0·063	0·769	Hann 6: 40·31–99·17
Total flowerhead diameter	2	60·6 (59·0–68·0)	16·1	21·2	–0·914 ± 0·124	0·910 ± 0·161	0·996	Hann 6: 40·31–99·17

LG, linkage group.

This Feature Is Available To Subscribers Only