Mapping of Quantitative Trait Loci Controlling Adaptive Traits in Coastal Douglas Fir. III. Quantitative Trait Loci-by-Environment Interactions

• DOI: 10.1093/genetics/165.3.1489
• Publication Date: 2021-04-28T07:48:13Z
• Authors: Kathleen D Jermstad; Daniel L Bassoni; Keith S Jech; Gary A Ritchie; Nicholas C Wheeler; David B Neale
• Keywords: Family-based QTL mapping; Trait; Genetic architecture; Quantitative Genetics; Douglas fir; Phenotypic trait

Abstract Quantitative trait loci (QTL) were mapped in the woody perennial Douglas fir (Pseudotsuga menziesii var. [Mirb.] Franco) for complex traits controlling timing of growth initiation and cessation. QTL estimated under controlled environmental conditions to identify interactions with photoperiod, moisture stress, winter chilling, spring temperatures. A three-generation mapping population 460 cloned progeny was used genetic phenotypic evaluations. An all-marker interval method scanning genome presence single-factor ANOVA estimating QTL-by-environment interactions. modest number detected per trait, individual explaining up 9.5% variation. Two QTL-by-treatment found initiation, whereas several among cessation traits. This is first report specific signals forest trees will assist identification candidate genes these important adaptive plants.