High-density genetic linkage mapping in Sitka spruce advances the integration of genomic resources in conifers by Tumas, H, Ilska, J, Gerardi, S, Laroche, J, A'Hara, S, Boyle, B, Janes, M, McLean, P, Lopez, G, Lee, S, Cottrell, J, Gorjanc, G, Bousquet, J, Woolliams, J, Mackay, JJ