Indian Society of Genetics & Plant Breeding

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SELECTION INDICES FOR CANE YIELD IN SUGARCANE

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Various selection indices w<?re constructed for cane yield in a population of twenty
two advanced sugarcane genotypes, tested in 4 location x 2 yearly environments.
Cane yield contributing characters such as number of millable canes (NMC), stalk
height, stalk thickness and stalk weight and the juice extraction per cent were used
to estimate expected genetic gain from selection indices for cane yield, The selection
index (51) with NMC, stalk height, stalk weight and juice extraction per cent and
cane yield itself had maximum genetic gain (18.47%) over straight selection. The
genetic gain of 51 with above five characters and cane thickness was 18. 44 percent.
The genetic gains of SIs were v,ery low with any five characters excluding NMC
(1.20%) or cane yield (6.04%). SIS with both NMC and cane yield had 16.97 per
cent genetic gain over straight selection. Thus NMC and cane yield should be
included in 51 for maximum cane yield. However, selection based on NMC, cane
yield, stalk height, stalk weight and juice extraction percent was important for
maximum improvement in cane yield.
 

Keywords: Selection indices, cane yield, sugarcane

Info

Year: 1998
Volume: 58
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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