EVALUATION OF SOMACLONES FOR YELLOW LEAF DISEASE RESISTANCE, CANE YIELD AND QUALITY ATTRIBUTES IN SUGARCANE (Saccharum officinarum L.)
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Date
2018
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Acharya N.G. Ranga Agricultural University
Abstract
Thirteen sugarcane somaclones along with five checks were evaluated in a
randomized block design with two replications which were planted at Agricultural
Research Station (ARS), Perumallapalle, Tirupati, during cropping season 2017-18
so as to identify the best somaclone with high cane yield and YLD resistance.
Analysis of variance revealed significant mean sum of squares due to entries
for fifteen characters viz., germination % at 35 DAP, tillers at 120 DAP (000'/ha),
shoots at 240 DAP (000'/ha), cane length (cm), cane girth (cm), number of
internodes per cane, number of millable canes ('000/ha), single cane weight, cane
yield (t/ha), brix %, sucrose %, purity %, CCS%, fibre% and CCS yield (t/ha).
Hence further analysis were performed for 15 characters only. High estimates of
genotypic coefficient of variation were registered for CCS yield, cane yield and
single cane weight and moderate estimates of genotypic coefficient of variation
were recorded for shoots at 240 DAP, number of millable canes, germination % at
35 DAP, tillers at 120 DAP and cane length which indicated that sufficient variation
was present in the experimental material.
Based on estimates of heritability and genetic advance as per cent of mean,
it was therefore suggested that preference should be given to tillers at 120 DAP,
shoots at 240 DAP, number of millable canes, single cane weight, cane yield and
CCS yield in the selection programme to isolate superior lines for wholistic
improvement in cane yield.
Total five somaclones for yellow leaf disease resistance were obtained out of
which three somaclones (16T7, 16T12 and 16T15) are from 2003V46, one (16T31)
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from Co86032 and one (16T37) from 94V101. Among these resistant somaclones,
16T7 recorded significantly high per se performance for tillers at 120 DAP, shoots
at 240 DAP and cane yield and showed significant superiority over its parent for
shoots at 240 DAP, number of millable canes at harvest, cane yield, sucrose %,
purity %, CCS% and CCS yield. Somaclone, 16T12 recorded significantly high
performance for cane yield and significantly better performance over its parent for
shoots at 240 DAP, number of millable canes at harvest. Somaclone, 16T15 showed
high performance for cane yield and significantly high value over its parent for
purity % and CCS %. The somaclone, 16T31 from Co86032 recorded highest cane
length. The somaclone, 16T37 from 94V101 recorded significantly high per se
performance for cane length, single cane weight and CCS yield. It also showed
significant superiority over its parent for cane girth, single cane weight, purity %,
CCS % and CCS yield.
It can be concluded that selection based on tillers at 120 DAP, shoots at 240
DAP, no. of millable canes, single cane weight, can yield and CCS yield would be
effective. The somaclones viz., 2016T7, 2016T11, 2016T12, 2016T15 and 2016T37
performed well for most of the characters viz., tillers at 120 DAP, shoots at 240
DAP, single cane weight, cane yield, sucrose%, purity % CCS% and CCS yield.
Considering their resistance to YLD 2016T7, 2016T12, 2016T15 and 2016T37 can
be promoted as commercial varieties in YLD prone areas.
Description
D5719
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