Breeding Maize for Lignocellulosic Biofuel Production

León, Natalia de; Kaeppler, Shawn M.; Lauer, Joseph G.

doi:10.1002/9781118609477.ch8

Cited by 3 publications

(6 citation statements)

References 67 publications

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“…Elite maize varieties selected for grain yield may not be ideal for dual exploitation, as selection for grain may negatively affect some relevant characteristics for a dual purpose biofuel resource [23,39]. To reduce the cost per unit of biofuels, biomass yield, residue use, and the efficiency in plant fiber conversion digestibility are key factors.…”

Section: Discussionmentioning

confidence: 99%

“…Neutral detergent fiber is an estimate of total cell wall, including cellulose, hemicellulose, and lignin; ADF is composed primarily of cellulose and lignin; and ADL estimates lignin insoluble in acid [38]. For biological conversion to bioethanol, high carbohydrate concentration and low recalcitrance would be ideal, [39] that is, high values of NDF and ADF and a low value of ADL are desirable. However, for thermochemical conversion the recalcitrance levels are not relevant [39], and high values of ADL would not be detrimental.…”

Section: Fiber Analysismentioning

confidence: 99%

“…For biological conversion to bioethanol, high carbohydrate concentration and low recalcitrance would be ideal, [39] that is, high values of NDF and ADF and a low value of ADL are desirable. However, for thermochemical conversion the recalcitrance levels are not relevant [39], and high values of ADL would not be detrimental.…”

Section: Fiber Analysismentioning

confidence: 99%

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Genetic Diversity for Dual Use Maize: Grain and Second-Generation Biofuel

2021

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Maize biomass from agricultural residues can be a substrate for biofuel production. However, commercial breeding programs have focused on grain yield for food and feed, and whole plant yield and nutritive value for silage, with little attention paid directly to stover yield or composition. Enhancing the energy content of crop residues with higher quality cellulosic biomass for ethanol conversion should provide a complementary use to grain use. We also question whether there is maize germplasm predisposed to dual use as second-generation biofuel. Twenty genotypes, including landraces from Spain, Atlantic, and Mediterranean Europe and genotypes derived from Iowa stiff stalk synthetic, Lancaster, and commercial hybrids were studied in a randomized complete block design across environments in Galicia (Spain) in 2010 and 2011. Germplasm was evaluated for agronomic characteristics and fiber parameters. Results show high heritability for all characteristics and parameters, ranging from 0.81 to 0.98. Principal components analysis revealed clear differences among origin of the varieties studied. Hybrids had the highest grain yield values and B73xMo17 and PR34G13 had the highest grain yield overall, at 10133 and 9349 kg/ha, respectively. European landrace varieties had lower harvest indexes (HI) than the hybrid origin, with Faro and BSL having HI of 0.43–0.47, compared to hybrid PR34613 at 0.56. Fiber concentrations were significantly correlated with yield performance, with values ranging from 0.38 to 0.61 for cob fibers and between −0.14 to −0.57 for stover fibers. Fiber concentrations were significantly different, based on the origins, in cobs but not in stover, with the Atlantic European group showing a favorable trend for cob exploitation with low acid detergent lignin and high acid detergent fiber and neutral detergent fiber values. In summary, population origin showed a reservoir of genetic diversity for breeding to improve residue quality, suggesting that adaptation played a role for stover yield and quality. European landraces could be used in prebreeding programs with stover yield and fiber quality as target traits for dual-purpose maize.

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Section: Discussionmentioning

confidence: 99%

Section: Fiber Analysismentioning

confidence: 99%

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Genetic Diversity for Dual Use Maize: Grain and Second-Generation Biofuel

2021

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“…Other important initial cell-wall properties that have been correlated with digestibility or hydrolysis include the lignin syringyl/guaiacyl (S/G) ratio, lignin β- O -4 content, etherified ferulic acid (FA) content, and esterified p -coumaric acid ( p CA) content ( Jung and Buxtono, 1994 ; Méchin et al , 2000 ; Iiyama and Lam, 2001 ). Strategies for engineering maize lines for its cellulosic biofuel or silage/feed value have been reviewed recently ( Barrière et al , 2003 ; Jung et al , 2012 ) with strategies that include increasing the non-starch biomass yield and the total carbohydrate content ( Vermerris et al , 2007 ; de Leon et al , 2013 ) and redirection of carbon to non-cellulosic sugars in the cell wall (e.g. β-glucan, starch; Slewinski, 2012 ; Chuck et al , 2011 ; Chuck, 2013 ; Pauly et al , 2014 ), as well as reducing the overall recalcitrance through decreasing the lignin content ( He et al , 2003 ), altering the lignin monomer content ( Piquemal et al , 2002 ), and alteration of feruloylation ( Jung and Phillips, 2010 ; Barros-Rios et al , 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Cell-wall properties contributing to improved deconstruction by alkaline pre-treatment and enzymatic hydrolysis in diverse maize (Zea maysL.) lines

Heckwolf

Crowe

et al. 2015

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“…Cone and Engels [ 152 ] indicated that an increase in lignin content results in decreasing cell wall digestibility. However, other authors de Leon et al [ 153 ] found that breeding for increasing dry matter digestibility have not altered cell wall lignification. Barros et al [ 149 ] also did not find a relationship between lignin content and bioethanol conversion and concluded that tissue anatomy and/or additional cell wall chemical properties may be important factors that influence production of maize stover ethanol.…”

Section: Dual Purpose Crops Optimized For Grain-biomass Productionmentioning

confidence: 97%

Redefining Agricultural Residues as Bioenergy Feedstocks

2016

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The use of plant biomass is a sustainable alternative to the reduction of CO2 emissions. Agricultural residues are interesting bioenergy feedstocks because they do not compete with food and add extra value to the crop, which might help to manage these residues in many regions. Breeding crops for dual production of food and bioenergy has been reported previously, but the ideal plant features are different when lignocellulosic residues are burnt for heat or electricity, or fermented for biofuel production. Stover moisture is one of the most important traits in the management of agricultural waste for bioenergy production which can be modified by genetic improvement. A delayed leaf senescence or the stay-green characteristic contributes to higher grain and biomass yield in standard, low nutrient, and drought-prone environments. In addition, the stay-green trait could be favorable for the development of dual purpose varieties because this trait could be associated with a reduction in biomass losses and lodging. On the other hand, the stay-green trait could be detrimental for the management of agricultural waste if it is associated with higher stover moisture at harvest, although this hypothesis has been insufficiently tested. In this paper, a review of traits relevant to the development of dual purpose varieties is presented with particular emphasis on stover moisture and stay-green, because less attention has been paid to these important traits in the literature. The possibility of developing new varieties for combined production is discussed from a breeding perspective.

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Breeding Maize for Lignocellulosic Biofuel Production

Cited by 3 publications

References 67 publications

Genetic Diversity for Dual Use Maize: Grain and Second-Generation Biofuel

Genetic Diversity for Dual Use Maize: Grain and Second-Generation Biofuel

Cell-wall properties contributing to improved deconstruction by alkaline pre-treatment and enzymatic hydrolysis in diverse maize (Zea maysL.) lines

Redefining Agricultural Residues as Bioenergy Feedstocks

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