Identification of Genes and Metabolic Pathways Involved in Resin Yield in Masson Pine by Integrative Analysis of Transcriptome, Proteome and Biochemical Characteristics  
[PERSON]  
1 Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, Guizhou University, Guiyang 550025, China 12 Institute for Forest Resources & Environment of Guizhou/College of Forestry, Guizhou University, Guiyang 550025, China 2  
[PERSON]  
1 Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, Guizhou University, Guiyang 550025, China 12 Institute for Forest Resources & Environment of Guizhou/College of Forestry, Guizhou University, Guiyang 550025, China 2  
[PERSON]  
1 Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, Guizhou University, Guiyang 550025, China 1  
[PERSON]  
2 Institute for Forest Resources & Environment of Guizhou/College of Forestry, Guizhou University, Guiyang 550025, China 2  
[PERSON]  
1 Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, Guizhou University, Guiyang 550025, China 12 Institute for Forest Resources & Environment of Guizhou/College of Forestry, Guizhou University, Guiyang 550025, China 2  
[PERSON]  
1 Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, Guizhou University, Guiyang 550025, China 1  
[PERSON]  
1 Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, Guizhou University, Guiyang 550025, China 1  
Footnote 1: email: {luonan.shen.liu.z,liu.z,[EMAIL_ADDRESS],liu. resin yield is mainly affected by photosynthesis-related genes (controlling photosynthesis-producing capacity) and resin biosynthesis-related genes (controlling resin-producing capacity) [15]. Previous studies demonstrated that resin yield was closely related to tree diameter, percentage of the live crown, photosynthesis, resin duct number, and resin duct volume [15; 16; 17; 18]. The relationship between resin yield and resin components has been also investigated, and the results demonstrated that some terpenoids could be used as the diagnostic marker for high resin yieldsters [7; 18; 19]. To date, however, studies involved in the molecular regulatory mechanisms of resin yield have been very limited. Excavation of the genes involved in resin yield can facilitate the selection for high resin-yielding germplasm and shorten the breeding cycle in conifers. As is well known, terpenoid biosynthesis is usually completed via methyl-erythritol 4-phosphate (MEP) and mevalonate (MVA) pathways. The MEP pathway begins with the condensation of pyruvate and d-glyceraldehyde 3-phosphate (G3P) to generate 1-deoxy-d-xylulose 5-phosphate (DXP), followed by intramolecular rearrangement and reduction. The MVA pathway includes the condensation of three molecules from the initial substrate acetyl-coenzyme A to MVA and other phosphorylation events [20]. It is thought that monoterenes and diterpenenes are biosynthesized by the MEP pathway, which are the major components of the conifer resin, while sesquiterpenes are biosynthesized by the MVA pathway which is less abundant in the resin [3]. In terpenoid biosynthesis, a set of enzyme genes, including geranyl pyrophosphate synthase (_GPPS_), farnesyl pyrophosphate synthase (_FPPS_), geranylgeranyl pyrophosphate synthase (_GGPPS_), monoterene synthase (_MonoTPS_), sesquiterpene synthase (_SesquiTPS_) and diterpene synthase (_DiTPS_), are directly participated in the biosynthesis of monoterenes, sesquiterpenes, and diterpenes [2; 21].