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Polymorphisms in O-methyltransferase genes are associated with stover cell wall digestibility in European maize (Zea maysL.)

Authors: Brenner, Everton A.; Zein, Imad; Chen, Yongsheng; Andersen, Jeppe R.; Wenzel, Gerhard; Ouzunova, Milena; Eder, Joachim; +4 Authors

Polymorphisms in O-methyltransferase genes are associated with stover cell wall digestibility in European maize (Zea maysL.)

Abstract

Abstract Background OMT (O-methyltransferase) genes are involved in lignin biosynthesis, which relates to stover cell wall digestibility. Reduced lignin content is an important determinant of both forage quality and ethanol conversion efficiency of maize stover. Results Variation in genomic sequences coding for COMT, CCoAOMT1, and CCoAOMT2 was analyzed in relation to stover cell wall digestibility for a panel of 40 European forage maize inbred lines, and re-analyzed for a panel of 34 lines from a published French study. Different methodologies for association analysis were performed and compared. Across association methodologies, a total number of 25, 12, 1, 6 COMT polymorphic sites were significantly associated with DNDF, OMD, NDF, and WSC, respectively. Association analysis for CCoAOMT1 and CCoAOMT2 identified substantially fewer polymorphic sites (3 and 2, respectively) associated with the investigated traits. Our re-analysis on the 34 lines from a published French dataset identified 14 polymorphic sites significantly associated with cell wall digestibility, two of them were consistent with our study. Promising polymorphisms putatively causally associated with variability of cell wall digestibility were inferred from the total number of significantly associated SNPs/Indels. Conclusions Several polymorphic sites for three O-methyltransferase loci were associated with stover cell wall digestibility. All three tested genes seem to be involved in controlling DNDF, in particular COMT. Thus, considerable variation among Bm3 wildtype alleles can be exploited for improving cell-wall digestibility. Target sites for functional markers were identified enabling development of efficient marker-based selection strategies.

Countries
France, Denmark, United States, United States
Keywords

DNA, Plant, Genotype, maïs, digestibilité, Plant Science, Lignin, Polymorphism, Single Nucleotide, Zea mays, 333, Linkage Disequilibrium, zea mays, INDEL Mutation, Agronomy and Crop Sciences, Cell Wall, Research article, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, [SDV.BV] Life Sciences [q-bio]/Vegetal Biology, Genetic Association Studies, bioethanol, O-METHYLTRANSFERASE, Vegetal Biology, Models, Genetic, gène, Botany, Methyltransferases, Sequence Analysis, DNA, Logistic Models, Phenotype, biocarburant, QK1-989, paroi cellulaire, Sequence Alignment, Biologie végétale

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
32
Top 10%
Top 10%
Top 10%
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