Assessment of growth and yield performance of rubber tree clones of the IAC 500 series

Pesquisa Agropecuária Brasileira

Paulo De Souza Gonçalves¹  Erivaldo José Scaloppi Júnior¹  Maria Alice Martins¹  Rogério Manoel Biagi Moreno¹  Roberto Botelho Ferraz Branco¹  Elaine Cristine Piffer Gonçalves¹ 

关键词: Hevea brasiliensis;    bark thickness;    brown bast;    vigor;    yield;    Hevea brasiliensis;    espessura de casca;    secamento do painel;    vigor;    produção;   

DOI  :  10.1590/S0100-204X2011001200009

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the performance of 15 clones of the IAC 500 series of Hevea brasiliensis, developed at Instituto Agronômico (IAC), over a 12-year period, in the northwest region of São Paulo State, Brazil. The 15 new clones evaluated are primary clones obtained from selected ortets within half-sib progenies. The clone RRIM 600, of Malaysian origin, was used as the control. Dry rubber yield performance over a four-year period, mean girth at the tenth year, girth increment before and during tapping, thermal properties of the natural rubber produced and other characters of the laticiferous system were evaluated. Forty percent of the clones were superior in comparison to the control for yield. Clone IAC 500 recorded the highest yield (66.81 g per tree per tapping) over four years of tapping, followed by IAC 502 (62.37 g per tree per tapping), whereas the control recorded 48.71 g per tree per tapping. All selected clones were vigorous in growth. The natural rubber from this IAC clones showed thermal stability up to 300ºC. No differences were observed in the thermal behavior of rubber among the IAC series and the RRIM 600 clones. The clones IAC 500, IAC 501, IAC 502, IAC 503 and IAC 506 are the more promising for small-scale plantations, due to growth and yield potential.

【 授权许可】

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