Polymorphisms in monolignol biosynthetic genes are associated with biomass yield and agronomic traits in European maize (Zea mays L.)

BMC Plant Biology

Research Article

Imad Zein¹  Thomas Lübberstedt²  Everton Alen Brenner²  Yongsheng Chen³  Jeppe Reitan Andersen⁴  Mathias Landbeck⁵  Milena Ouzunova⁵ 

[1] Department of Agronomy and Plant Breeding, Technical University of Munich, Am Hochanger 2, 85354, Freising-Weihenstephan, Germany;Department of Agronomy, Iowa State University, 50011, Ames, Iowa, USA;Department of Agronomy, Iowa State University, 50011, Ames, Iowa, USA;Interdepartmental Genetics Graduate Program, Iowa State University, 50011, Ames, Iowa, USA;Department of Genetics and Biotechnology, University of Aarhus, Research Center Flakkebjerg, 4200, Slagelse, Denmark;KWS Saat AG, Grimsehlstr. 31,37555 Einbeck, Germany;

关键词: Lignin Content;    Neutral Detergent Fiber;    Cinnamyl Alcohol Dehydrogenase;    Complete Linkage Disequilibrium;    Cell Wall Digestibility;   

DOI  :  10.1186/1471-2229-10-12

 received in 2009-06-04, accepted in 2010-01-15,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundReduced lignin content leads to higher cell wall digestibility and, therefore, better forage quality and increased conversion of lignocellulosic biomass into ethanol. However, reduced lignin content might lead to weaker stalks, lodging, and reduced biomass yield. Genes encoding enzymes involved in cell wall lignification have been shown to influence both cell wall digestibility and yield traits.ResultsIn this study, associations between monolignol biosynthetic genes and plant height (PHT), days to silking (DTS), dry matter content (DMC), and dry matter yield (DMY) were identified by using a panel of 39 European elite maize lines. In total, 10 associations were detected between polymorphisms or tight linkage disequilibrium (LD) groups within the COMT, CCoAOMT2, 4CL1, 4CL2, F5H, and PAL genomic fragments, respectively, and the above mentioned traits. The phenotypic variation explained by these polymorphisms or tight LD groups ranged from 6% to 25.8% in our line collection. Only 4CL1 and F5H were found to have polymorphisms associated with both yield and forage quality related characters. However, no pleiotropic polymorphisms affecting both digestibility of neutral detergent fiber (DNDF), and PHT or DMY were discovered, even under less stringent statistical conditions.ConclusionDue to absence of pleiotropic polymorphisms affecting both forage yield and quality traits, identification of optimal monolignol biosynthetic gene haplotype(s) combining beneficial quantitative trait polymorphism (QTP) alleles for both quality and yield traits appears possible within monolignol biosynthetic genes. This is beneficial to maximize forage and bioethanol yield per unit land area.

【 授权许可】

Unknown   
© Chen et al; licensee BioMed Central Ltd. 2010. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.