Indian Society of Genetics & Plant Breeding

Harvest index and the components of biological yield in sugarcane

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Sugarcane has emerged as a new and potential source of
power and bioethanol. Harvest index is a useful parameter
to assess the suitability of different varieties for various
end-uses. Field studies on harvest index were carried out
involving sugarcane varieties and elite genotypes
representing the varietal spectrum of subtropical India. The
relative contribution of various components of biological
yield, such as leaf, stalk and root biomass showed
substantial differences among varieties. Harvest index for
cane yield was found to vary between 66-81% for the
commercial hybrids. The harvest index for sugar yield
followed more or less a similar trend. Results highlighted
the positive impact of inter-specific hybridization, as the
current varieties had higher harvest index than the
accessions of the parental cultivated species, namely,
Saccharum officinarum, S. barberi and S. sinense and the
wild species, S. spontaneum. The extent of variability for
this important parameter provides scope for further
improving the assimilate partitioning without jeopardizing
the adaptability of sugarcane varieties under North Indian
agro-climates.

Keywords: Harvest index, sugarcane varieties, components of biological yield, cane yield, sugar yield, bagasse yield

Info

Year: 2013
Volume: 73
Issue: 4
Article DOI: 10.5958/j.0975-6906.73.4.058
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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