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Clones
The planting materials approved by the Rubber Board are classified in to three categories
I, II and III.
Category I
Approved for large scale planting. However, it is strongly recommended that these
may be used to cover only 50% of the total area of any estate or small holding.
Category II
Clones, which have shown their good performance in India over long term or medium
term periods. It is recommended that three or more of these clones be used to plant
up to 50 per cent of the total area of any estate or small holding. Cattle manure
and 4 kg of rock phosphate for every 100 m2 of of nursery bed is recommended as basal
dressing. When the same area is repeatedly used, rock phosphate needs to be
applied only once in three years. Application of 275 kg urea, 700 kg rock phosphate,
85 kg muriate of potash and 235 kg magnesium sulphate or 1250 kg 10-4-1.5 NPKMg mixture
and 118 kg magnesium sulphate per hectare 6-8 weeks after planting is recommended.
Zinc sulphate @ 25kg/ha may be applied 2 weeks after the fertilizer application.
After 6-8 weeks from first fertilizer application, urea may be applied at 275kg/ha.
Subsequently application of zinc sulphate in the nursery may be carried out on soil test basis.
Category III
Planting materials are divided into
- Those, which have held out promise of good performance
in small-scale trials, and over short term in some large scale trials in India or
abroad. Hence these are approved only for experimental planting
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Old selections having promising localized performance or having desirable secondary
attributes. In regions where these clones are showing very good performance, no
restriction in planting is insisted. Modern clones with moderate scale performance
are included in division
- Other experimental clones
of promising yield and/or desirable secondary characters with limited data are included
in division
- Selections from any of these are recommended
for very small scale planting not exceeding 15 per cent of the total area
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Category I
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Clones RRII 105, PB 260, RRII 414 and RRII 430 (RRIM 600 and GT 1 in non traditional
areas),RR11 422
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Category II
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Clones RRIM 600, GT 1, RRII 5, RRII 203, PB 28/59, PB 217, RRII 414, RRII 417, RRII
422 RRII 703 , RRII 430 , PB 255, PB 280, PB 312, and PB 314
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Category III
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Clone RRII 50, RRII 51, RRII 52, RRII 118, RRII 176, RRII 208, RRII 300, RRII 429,RRII
203, PR 107, PR 255, PR 261, PB 86, PB 5/51, PB 235, PB 255, PB 280, PB 311,
PB 312, PB 314, PB 330, PB 6/9, RRIM 605, RRIM 701, RRIM 703, RRIM 712, RRIM 623,
RRIM 628, RRIC 100, RRIC 102, RRIC 130, KRS 163, IRCA 111, IRCA 109, IRCA 130, SCATC 88-13,
SCATC 93-114, Haiken 1, BPM 24, Tjir 1 and Polyclonal seeds
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Clones evolved and released from RRII
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Clone
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Parentage
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Status
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RRII 105
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Tjir 1 x Gl 1
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Category I
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RRII 5
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Primary clone
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Category III (a)
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RRII 203
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PB 86 x Mil 3/2
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Category III (a)
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RRII 118
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Mil 3/2 x Hil 28
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Category III (c)
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RRII 208
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Mil 3/2 x AVROS 255
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Category III (c)
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RRII 50
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Primary clone
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Category III (d)
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RRII 51
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Primary clone
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Category III (d)
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RRII 109
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Tjir 1 x Mil 3/2
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Category III (d)
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RRII 116
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Mil 3/2 x Hil 28
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Category III (d)
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RRII 176
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Mil 3/2 x PB 5/60
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Category III (d)
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RRII 300
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Tjir 1 x PR 107
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Category III (d)
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RRII 308
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Gl 1 x PB 6/50
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Category III (d)
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RRII 414
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RRII 105 x RRIC 100
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Category III (d)
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RRII 417
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RRII 105 x RRIC 100
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Category III (d)
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RRII 422
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RRII 105 x RRIC 100
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Category III (d)
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RRII 429
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RRII 105 x RRIC 100
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Category III (d)
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RRII 430
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RRII 105 x RRIC 100
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Category III (d)
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