Table 4 Discrete QTL, both specific and pleiotropic/linked, identified in hop; and the sex, yield and cone chemistry traits affected by each locus
QTL region | Specificity | Linkage group | No. traits | Traits |
|---|---|---|---|---|
QTL region 1 | pleiotropic | Nugget 1 | 2 | methyl decanoate; methyl dec-4-enoate |
QTL region 2 | pleiotropic | Nugget 1 & Hallertauer Magnum 1 | 4 | α-acid:β-acid; caryophyllene; xanthohumol; dry cone weight |
QTL region 3 | specific | Nugget 1 | 2 | humulene; humulene:caryophyllene |
QTL region 4 | specific | Nugget 1 | 2 | δ-cadinene; γ-cadinene |
QTL region 5 | pleiotropic | Nugget 1 | 4 | α-acid; humulone + adhumulone; cohumulone; α-selinene |
QTL region 6 | pleiotropic | Nugget 2 | 18 | cohumulone; cohumulone (% of α-acid); β-acid; colupulone; colupulone (% of β-acid); α-acid:β-acid; methyl decanoate; humulene diepoxide a; humulol;, β-pinene; myrcene; terpinene; β-selinene; caryophyllene; humulene; muurolene; xanthohumol; essential oil content |
QTL region 7 | pleiotropic | Nugget 5 | 8 | α-acid; humulone + adhumulone; β-acid; lupulone + adlupulone; colupulone; linalool; myrcene; humulene |
QTL region 8 | specific | Nugget 5 | 1 | ρ-cymene |
QTL region 9 | pleiotropic | Nugget 5 | 3 | methyl-4-methylhex-2-enoate; 2-undecanone; farnesene |
QTL region 10 | specific | Nugget 7 | 3 | β-acid; lupulone + adlupulone; α-acid:β-acid |
QTL region 11 | pleiotropic | S.B.L. 3/3 3 | 3 | β-acid; lupulone + adlupulone; limonene |
QTL region 12 | pleiotropic | S.B.L. 3/3 3 | 11 | α-acid:β-acid; methyl decanoate; 2-undecanone; humulol; t-cadinol; α-capaene; γ-cadinene; caryophyllene; farnesene; humulene; muurolene |
QTL region 13 | specific | S.B.L. 3/3 5 & S.B.L. 2/1 5 | 1 | sex |
QTL region 14 | specific | S.B.L. 3/3 6 | 1 | terpinene |