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Determining transpiration efficiency of bmr sorghum genotypes for progressive drought tolerance

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Relation http://oar.icrisat.org/10706/
 
Title Determining transpiration efficiency of bmr sorghum genotypes for progressive drought tolerance
 
Creator Romana, K K
Kunapareddy, A
Gupta, R
Ashok Kumar, A
 
Subject Abiotic Stress
Crop Improvement
Sorghum
Genetics and Genomics
 
Description Food and energy security are fundamental to the economic development
of nations and considering environmental issues, biomass-based
energy is a promising option in India through lingo-cellulosic
(2G) biofuel production. High biomass sorghum
is a promising feedstock for 2G biofuels production. However,
higher lignin content of the biomass and water-deficit stress
are major issues in enhancing biomass sorghum based biofuels
production. In sorghum, brown midrib (bmr) mutants with reduced
lignin content were developed.The present glass house
study summarizes a screening experiment of 14 bmr sorghum
lines (Atlas, Atlas bmr-12, Early hegarisart, IS 18542, Kanas collier,
N 592, N 593, N 594, N 595, N 596, N 597, N 598, Roxorange
and R-16) for progressive drought tolerance. The results
showed that among the various bmr lines tested, N 593 had
the highest transpiration efficiency in water-stressed conditions,
whereas N 592 had the highest in well-watered conditions.
The lowest transpiration efficiency was observed in N
597 under water stressed treatment. However, for well watered
treatments the lowest was observed in N 596. The genotypes
having higher transpiration efficiency has more water holding
capacity for longer time under water stressed conditions. This
preliminary study helps to identify genotypes with more water-holding
capacity to adapt well in drought conditions. The
bmr genotypes used here showed reduced lignin content vis-à-
vis white midrib sorghums. The identified lines with low-lignin,
high biomass and higher water holding capacity can be used as
feedstocks in 2G Biofuels production after appropriate testing
in target environments.
 
Date 2017-02
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/10706/1/216.pdf
Romana, K K and Kunapareddy, A and Gupta, R and Ashok Kumar, A (2017) Determining transpiration efficiency of bmr sorghum genotypes for progressive drought tolerance. In: InterDrought-V, February 21-25, 2017, Hyderabad, India.