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Forests 2015, 6(5), 1649-1665;

Allelic Variation in Cinnamyl Alcohol Dehydrogenase (LoCAD) Associated with Wood Properties of Larix olgensis

Key Laboratory of Forest Tree Genetic Improvement and Biotechnology, Northeast Forestry University, Harbin 150040, China
College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
Author to whom correspondence should be addressed.
Academic Editors: Om P. Rajora and Eric J. Jokela
Received: 16 April 2015 / Revised: 30 April 2015 / Accepted: 30 April 2015 / Published: 12 May 2015
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Cinnamyl alcohol dehydrogenase (CAD) catalyzes the key step in the lignin monomer biosynthesis pathway, but little is known about CADs in larch (Larix olgensis). Larch is one of the most important conifer plantation species and is used worldwide for reforestation and paper making. However, the presence of lignin is a significant barrier in the conversion of plant biomass to bioethanol. In the current study, 240 individuals from the Northeast Forest University provenance progeny trial population were evaluated, and 47 single-nucleotide polymorphisms (SNPs) were identified in the CAD gene. We used a candidate gene-based association mapping approach to identify CAD gene allelic variants that were associated with growth and wood property traits in L. olgensis. We found that LoCAD harbors high single nucleotide polymorphism (SNP) diversity (πT = 0.00622 and θW = 0.00646). The results of an association analysis indicated that nine SNPs and six haplotypes were significantly associated with wood property and growth traits, explaining between 1.35% and 18.4% of the phenotypic variance. There were strong associations between SNP (g.590G > T) and SNP (g.1184A > T) in LoCAD. These SNPs might represent two quantitative trait nucleotides that are important for the analysis of lignin content. View Full-Text
Keywords: lignin; Larix olgensis; haplotype; single-nucleotide polymorphisms (SNPs); gene lignin; Larix olgensis; haplotype; single-nucleotide polymorphisms (SNPs); gene

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Wang, Y.; Jia, Q.; Zhang, L.; Zhang, Z.; Zhang, H. Allelic Variation in Cinnamyl Alcohol Dehydrogenase (LoCAD) Associated with Wood Properties of Larix olgensis. Forests 2015, 6, 1649-1665.

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