2012
DOI: 10.1007/s00122-012-1908-5
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Genetic and physical fine mapping of the novel brown midrib gene bm6 in maize (Zea mays L.) to a 180 kb region on chromosome 2

Abstract: Brown midrib mutants in maize are known to be associated with reduced lignin content and increased cell wall digestibility, which leads to better forage quality and higher efficiency of cellulosic biomass conversion into ethanol. Four well known brown midrib (bm) mutants, named bm1-4, were identified several decades ago. Additional recessive brown midrib mutants have been identified by allelism tests and designated as bm5 and bm6. In this study, we determined that bm6 increases cell wall digestibility and decr… Show more

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Cited by 23 publications
(18 citation statements)
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“…Veldboom and Lee (1996) already found a QTL for plant height in the same region of chromosome 2; Cai et al (2012a) a QTL at bin 4.01; Samayoa et al (2014) at bin 8.05; and Wei et al (2009) a QTL at bin 8.03. Chen et al (2012) confirmed the position of gen bm6 new bm mutation (Ali et al, 2010) for plant height and cell wall digestibility at bin 2.02.…”
Section: Discussionmentioning
confidence: 82%
“…Veldboom and Lee (1996) already found a QTL for plant height in the same region of chromosome 2; Cai et al (2012a) a QTL at bin 4.01; Samayoa et al (2014) at bin 8.05; and Wei et al (2009) a QTL at bin 8.03. Chen et al (2012) confirmed the position of gen bm6 new bm mutation (Ali et al, 2010) for plant height and cell wall digestibility at bin 2.02.…”
Section: Discussionmentioning
confidence: 82%
“…Preliminary experiments have shown that IVNDFD values of bm6 mutant plants were significantly improved (INRA Lusignan, unpublished data with glasshouse cropped plants harvested at grain maturity stage), in agreement with the observed colocalizations between the bm6 mutation and the IVNDFD QTL. From positional mapping, a list of ten genes was given as underlying the bm6 position [147]. None of these genes seemed obviously related to cell wall metabolism.…”
Section: Miscellaneous Cell Wall Related Genes As Possible Primary Dementioning
confidence: 99%
“…They encode orthologues of lignin biosynthetic genes such as caffeic-O-methyltransferases and O-methyltransferase [174, 308]. Moreover, candidate genes for a further brown midrib locus in maize (bm6) were proposed by genetic mapping [309]. Brown midrib mutants form an excellent model for investigating implications of lignin for crops and have been characterized regarding their resistance to biotic stresses [184], feed quality [227, 310, 311], biofuel potential [312314], and degradability in soil [315].…”
Section: Lignin As a Target For Crop Breedingmentioning
confidence: 99%