Genetic variation of biomass recalcitrance in a natural Salix viminalis (L.) population

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Genetic variation of biomass recalcitrance in a natural Salix viminalis (L.) population

Ohlsson, Jonas (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för Molekylära vetenskaper,Department of Molecular Sciences

Hallingbäck, Henrik (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Institutionen för skoglig genetik och växtfysiologi,Department of Plant Biology,Department of Forest Genetics and Plant Physiology

Jebrane, Mohamed (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Skogens biomaterial och teknologi,Department of Forest Biomaterials and Technology

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Sandgren, Mats (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för Molekylära vetenskaper,Department of Molecular Sciences

Rönnberg Wästljung, Ann-Christin (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology

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2019-06-03
2019
Engelska.
Ingår i: Biotechnology for Biofuels. - : Springer Science and Business Media LLC. - 1754-6834. ; 12

Relaterad länk:: https://pub.epsilon.... (primary) (Raw object) (free); visa fler...; https://biotechnolog...; https://res.slu.se/i...; https://doi.org/10.1...; visa färre...

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BackgroundSalix spp. are high-productivity crops potentially used for lignocellulosic biofuels such as bioethanol. In general, pretreatment is needed to facilitate the enzymatic depolymerization process. Biomass resistance to degradation, i.e., biomass recalcitrance, is a trait which can be assessed by measuring the sugar released after combined pretreatment and enzymatic hydrolysis. We have examined genetic parameters of enzymatic sugar release and other traits related to biorefinery use in a population of 286 natural Salix viminalis clones. Furthermore, we have evaluated phenotypic and genetic correlations between these traits and performed a genomewide association mapping analysis using a set of 19,411 markers.ResultsSugar release (glucose and xylose) after pretreatment and enzymatic saccharification proved highly variable with large genetic and phenotypic variations, and chip heritability estimates (h(2)) of 0.23-0.29. Lignin syringyl/guaiacyl (S/G) ratio and wood density were the most heritable traits (h(2)=0.42 and 0.59, respectively). Sugar release traits were positively correlated, phenotypically and genetically, with biomass yield and lignin S/G ratio. Association mapping revealed seven marker-trait associations below a suggestive significance threshold, including one marker associated with glucose release.ConclusionsWe identified lignin S/G ratio and shoot diameter as heritable traits that could be relatively easily evaluated by breeders, making them suitable proxy traits for developing low-recalcitrance varieties. One marker below the suggestive threshold for marker associations was identified for sugar release, meriting further investigation while also highlighting the difficulties in employing genomewide association mapping for complex traits.

Ämnesord

NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Trävetenskap (hsv//swe)
AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Wood Science (hsv//eng)

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Av författaren/redakt...: Ohlsson, Jonas; Hallingbäck, Hen ...; Jebrane, Mohamed; Sandgren, Mats; Rönnberg Wästlju ...

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