Abstract
Repeatability of yield and girth growth traits in rubber tree clones of series IAC 300
Highlights
The rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell. - Arg.] is a valuable market species owing to the multiple use of rubber in the industry
A similar situation was observed over a few years by Gonçalves et al (1990), who studied the rubber yield of a population of 211 individuals derived from clone Fx 25 by open pollination in Pariquera-açu, state of São Paulo
1 analyses of variance (ANOVA): analysis of variance; PCCOV: analysis of the principal components/phenotypic variances and covariance matrix; PCCOR: analysis of the principal components/correlation matrix; EVCOR: structural analysis yield) are more appropriate to estimate the coefficient of repeatability in different rubber tree clones
Summary
The rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell. - Arg.] is a valuable market species owing to the multiple use of rubber in the industry. - Arg.] is a valuable market species owing to the multiple use of rubber in the industry. Hevea is widely distributed in the countries of South America. Hevea species are indigenous to Bolivia, Colombia, French Guiana, Guayana, Peru, Surinam, and Venezuela. With exception of H. microphylla they are all found in Brazil, the center of origin (Webster and Paardekooper 1989). In the beginning of the century Brazil was the world’s main rubber producer and exporter. By 2006, Brazil produced 94 thousand tons of dry rubber, which is only 1.2% of the world production, while the domestic consumption amounted to 286 thousand tons (Rossman et al 2006)
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