期刊
GLOBAL CHANGE BIOLOGY BIOENERGY
卷 7, 期 4, 页码 797-810出版社
WILEY
DOI: 10.1111/gcbb.12201
关键词
biofuel; biomass; drought tolerance; genetic architecture; Miscanthus; QTL; synteny
资金
- Consortium for Plant Biotechnology Research [GO12026]
- Department of Energy [DE-FG36-02GO12026]
- Energy Bioscience Institute
- DuPont Pioneer
In light of rising energy costs, lignocellulosic ethanol has been identified as a renewable alternative to petroleum-based transportation fuels. In an attempt to reach government mandated ethanol production levels, potential plant biofeedstock candidates have been investigated, and cold-tolerant, perennial accessions within the C-4 grass genus Miscanthus have been identified as leading contenders in the Midwestern US. To facilitate the development of improved cultivars through marker-assisted breeding, a quantitative trait locus (QTL) study was conducted on a full-sib, F-1 mapping population segregating for flowering time, height, leaf width, and yield using a genetic map consisting of 846 segregating SNP and SSR markers. This was a 3year study investigating the genetic architecture underlying traits important to biomass production in a population of 221 progeny from a cross between M. sinensis Grosse Fountaine' and M. sinensis Undine' established in the spring of 2010; 72 QTLs with LOD scores above the genome-wide, permuted threshold equivalent to a P-value of 0.05 were identified across 13 traits. Of the 36 QTLs identified in 2011, 22 were detected again the following year. Both the use of spring emergence and vigor rating as a covariate to account for variation related to differences in establishment increased the power to detect QTLs in the 2year establishment period. Finally, a dry period in the middle of the 2012 growing season suggested that yield declines were due to a decrease in tiller diameter.
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