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Redefining Agricultural Residues as Bioenergy Feedstocks
#MMPMID28773750
Caicedo M
; Barros J
; Ordás B
Materials (Basel)
2016[Jul]; 9
(8
): ? PMID28773750
show ga
The use of plant biomass is a sustainable alternative to the reduction of CO?
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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