TY - GEN
T1 - Stalk strength and sugar content of different dual-purpose sorghum lines
AU - Chen, Shih Fang
AU - Brown, Patrick
AU - Danao, Mary Grace
PY - 2013
Y1 - 2013
N2 - Dual-purpose bioenergy crops, in which reduced carbon is harvested from multiple sources, are efficient feedstocks because carbon accumulation in any one organ is usually sink-limited. In other words, carbon yield from the vegetative stalk can usually be increased without sacrificing starch yield from the grain. In December 2012, sorghum was approved by EPA as an advanced bioenergy feedstock as it is highly tolerant to drought and requires lower inputs than maize. However, it is susceptible to lodging which reduces grain yields significantly. Stalk moisture and sugar content affect harvest, transport, and storage strategies. Therefore, identifying sorghum varieties with stronger stalk strength can prevent lodging damage and differentiating the hybrids with higher sugar content can increase potential biofuel yield. In this study, rind penetrometer resistance measurements of stalk strength and sugar content of the leaves and the stalks of 40 dwarf grain sorghum inbreds and 15 photoperiod sensitive sorghum inbreds were measured. These measurements were calibrated against the Fourier transform near infrared (FT-NIR) spectra of ground sorghum stalks and leaves to cluster inbreds using principal components analysis (PCA). Results showed dwarf grain sorghum contained 0.1-6.9% glucose in stalks, 0.3-3% glucose in leaves, 0-15% sucrose in stalks, 0-6.5% sucrose in leaves, and stalks strengths were ranged from 2.43-7.72 kg; photoperiod sensitive sorghum contained 0.6-12% glucose in stalks, 0.3-1.7% glucose in leaves, 0.3-17% sucrose in stalks, 0-3.1% sucrose in leaves, and stalks strengths were ranged from 2.43-7.72 kg. PCA results effectively clustered two varieties, fractions from leaves and stalks, and differentiated the sugar contents in stalks.
AB - Dual-purpose bioenergy crops, in which reduced carbon is harvested from multiple sources, are efficient feedstocks because carbon accumulation in any one organ is usually sink-limited. In other words, carbon yield from the vegetative stalk can usually be increased without sacrificing starch yield from the grain. In December 2012, sorghum was approved by EPA as an advanced bioenergy feedstock as it is highly tolerant to drought and requires lower inputs than maize. However, it is susceptible to lodging which reduces grain yields significantly. Stalk moisture and sugar content affect harvest, transport, and storage strategies. Therefore, identifying sorghum varieties with stronger stalk strength can prevent lodging damage and differentiating the hybrids with higher sugar content can increase potential biofuel yield. In this study, rind penetrometer resistance measurements of stalk strength and sugar content of the leaves and the stalks of 40 dwarf grain sorghum inbreds and 15 photoperiod sensitive sorghum inbreds were measured. These measurements were calibrated against the Fourier transform near infrared (FT-NIR) spectra of ground sorghum stalks and leaves to cluster inbreds using principal components analysis (PCA). Results showed dwarf grain sorghum contained 0.1-6.9% glucose in stalks, 0.3-3% glucose in leaves, 0-15% sucrose in stalks, 0-6.5% sucrose in leaves, and stalks strengths were ranged from 2.43-7.72 kg; photoperiod sensitive sorghum contained 0.6-12% glucose in stalks, 0.3-1.7% glucose in leaves, 0.3-17% sucrose in stalks, 0-3.1% sucrose in leaves, and stalks strengths were ranged from 2.43-7.72 kg. PCA results effectively clustered two varieties, fractions from leaves and stalks, and differentiated the sugar contents in stalks.
KW - FT-NIR spectroscopy
KW - Principal components analysis
KW - Sorghum
KW - Stalk strength
KW - Sugar content
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M3 - Conference contribution
AN - SCOPUS:84881623214
SN - 9781627486651
T3 - American Society of Agricultural and Biological Engineers Annual International Meeting 2013, ASABE 2013
SP - 2437
EP - 2450
BT - American Society of Agricultural and Biological Engineers Annual International Meeting 2013, ASABE 2013
PB - American Society of Agricultural and Biological Engineers
T2 - American Society of Agricultural and Biological Engineers Annual International Meeting 2013
Y2 - 21 July 2013 through 24 July 2013
ER -