Introductions
Nowadays, there is a world effort in replace the energetic
matrix derived from fossil fuels to renewable sources of
energy. Sugarcane is among the major economic crops in
the world and is the raw material for sugar and ethanol
production as also as other by-products having the most
efficient energetic balance (input over output) when compared
with other energetic crops such as maize, sorghum
and wheat (Lam et al. 2009). Brazil is the world leader in
sugarcane production with approximately 570 million of
tones of sugarcane, 31 millions of tones of sugar and 26
billions of liters of ethanol per year (UNICA 2011).
Yield is one of the most important and complex traits for
the majority of crops. In sugarcane, tones of sugarcane per
hectare, that combines sugar content (Pol%Cane) with
sugarcane productivity (TCH) is the main focus of sugarcane
variety improvement programs (Jordan et al. 2004)
besides other traits such as resistance to pests, diseases and
abiotic stresses. Therefore, higher sugar yields can be
achieved either by increasing sugar content or by increasing
cane yield (Aitken et al. 2008).
Biometric evaluations such as measurements of stalk
height, average diameter of the stalk, number of total active
leaves and number of stalks in one linear meter are of great
importance to vegetative development of sugarcane being
direct involved in sugarcane productivity (Casagrande
1981).
IntroductionsNowadays, there is a world effort in replace the energeticmatrix derived from fossil fuels to renewable sources ofenergy. Sugarcane is among the major economic crops inthe world and is the raw material for sugar and ethanolproduction as also as other by-products having the mostefficient energetic balance (input over output) when comparedwith other energetic crops such as maize, sorghumand wheat (Lam et al. 2009). Brazil is the world leader insugarcane production with approximately 570 million oftones of sugarcane, 31 millions of tones of sugar and 26billions of liters of ethanol per year (UNICA 2011).Yield is one of the most important and complex traits forthe majority of crops. In sugarcane, tones of sugarcane perhectare, that combines sugar content (Pol%Cane) withsugarcane productivity (TCH) is the main focus of sugarcanevariety improvement programs (Jordan et al. 2004)besides other traits such as resistance to pests, diseases andabiotic stresses. Therefore, higher sugar yields can beachieved either by increasing sugar content or by increasingcane yield (Aitken et al. 2008).Biometric evaluations such as measurements of stalkheight, average diameter of the stalk, number of total activeleaves and number of stalks in one linear meter are of greatimportance to vegetative development of sugarcane beingdirect involved in sugarcane productivity (Casagrande1981).
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