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Monday, August 19, 2013

RUBBER CLONES IN MALAYSIA (Part 3)

RUBBER (Hevea braziliensis) is an important commodity in
Malaysia since hundreds year ago. Systematic breeding and selection works of rubber clones to improve productivity has been an ongoing process in the Malaysian Rubber Board for almost nine decades. Since it embarked on the process, six series of clones with a total of 185 clones had been developed and recommended to the industry under the names RRIM 500 (1928-1931), RRIM 600 (1937-1941), RRIM 700 (1947-1958), RRIM 800 (1959-1965), RRIM 900 (1966-1973) and RRIM 2000 (1974 till now) series clones. Some of these clones are also widely planted in other rubber growing countries. The success of the rubber breeding programme can be seen from the multifold yield increase, from about 500 kg/ha/year for unselected seedlings to about 3,000 kg/ha/year in the modern clones. In the past, greater emphasis was given to produce high latex yielding clones, giving rise to a spectacular increase in yield. This was considered amazing given the narrow genetic base of the breeding population and this was achieved within two to three cycles of breeding and selection. But it could not be sustained largely due to the narrow genetic base. With the introduction of new genetic materials from Brazil in the 1950s in the development of the RRIM 900 and RRIM 2000 series clones have successfully increased the yield potential to about 3,000 kg per ha per year. This articles I my entry in "Anim Agro Technology" I share my knowledge about few new rubber clones released by Malaysian Rubber Board (LGM) from their websites for our knowledge.


 (7)  RRIM2001


 
Group 2A in MRB* Planting Recommendations 2006 and the criteria are :
(a) Recommended for both latex and timber production (b) The potential latex production is up to 2,850 kg per hectare per year
(c) Posses a wide girth and straight bole with 1.23 cubic metre of wood volume per tree after 17 years of planting
(d) Resistance to wind damage, Oidium and Colletotrichum leaf disease is good.

(8) RRIM2002
Group 2A in MRB* Planting Recommendations 2006 and the criteria are (a) Recommended for both latex and timber production. (b) The potential latex production is up to 2,348kg per hectare per year (c) Produce for 1.10 cubic metre of wood volume per tree after 17 years of planting (d) Resistance to wind damage, Oidium and Colletotrichum, pink disease, Corynespora, Phytopthora leaf disease is good. (e) Bark with average thickness. Colour of latex yellow.


(9) RRIM 2023
Group 2B in MRB* Planting Recommendations 2006 and the criteria are (a) Recommended for both latex and timber production. (b) The potential latex production is up to 2,822kg per hectare per year (c) Produce 0.81 cubic metre of wood volume per tree after 14 years of planting (d) Resistance to wind damage such as Oidium and Colletotrichum, pink disease,  Corynespora, leaf disease is good. (e) Average bark. Colour of latex white.

10.  RRIM2024
Group 2B in MRB* Planting Recommendations 2006 and the criteria are (a) Recommended for both latex and timber production. (b) The potential latex production is up to 2,685kg per hectare per year (c) Produce 1.26 cubic metre of wood volume per tree after 14 years of planting (d) Resistance to wind damage such and Oidium and Colletotrichum leaf disease is good and moderate respectively, Corynespora is good.
(e) Average bark. Colour of latex cream
.
Thanks.

By,
M Anem
Senior Agronomist,
Sungai Buloh,
Selangor,
Malaysia.
(30 Ramadan 1434H)

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