Genetic variation in growth traits and yield of rubber trees (Hevea brasiliensis) growing in the Brazilian state of São Paulo

Analysis of variance and covariance was preformed on growth traits (stem girth, bark thickness, total height gain and rubber yield) of 22 open-pollinated progenies of the rubber tree Hevea brasiliensis from an Asian Hevea collection introduced to Agronomic Institute (Instituto Agronômico, Campinas, São Paulo, Brazil; IAC) in 1952. This progeny trial was replicated at three sites in São Paulo state and it was found that at three years from sowing there was statistically significant variation for girth, bark thickness, height and rubber yield. An individual test sites, values of individual plant heritability for girth ranged from ĥ i 2 = 0.36 to ĥ i 2 = 0.89 whereas values for heritability for progeny means ranged from ĥ i 2 = 0.77 to ĥ i 2 = 0.87. These moderate and high heritabilities suggest that a combination of progeny and within-progeny selection would be effective at increasing girth in this population at individual sites. Across sites, values of individual-plant heritability for girth ranged from ĥ i 2 = 0.36 to ĥ i 2 = 0.47, whereas values for heritability of progeny means girth ranged from ĥ x̄ 2 = 0.77 to ĥ x̄ 2 = 0.87. There were high positive genetic correlations between increased girth and bark thickness suggesting that breeding aimed at increasing girth would also increase bark thickness and possibly height. Copyright by the Brazilian Society of Genetics.

Resoluciones aprobadas por el Consejo Económico y Social (47, 48 y 49 períodos de sesiones) y por la Asamblea General (24 y 25 períodos de sesiones) = Resolutions adopted by the Economic and Social Council (47, 48 and 49 sessions) and by the General Assembly (24 and 25 session)

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ECLAC Notes Nº 47

ECLAC Forecasts 5% Growth in 2006 for Latin America and the Caribbean Changing Role of the Family in Social Protection Op-ed by ECLAC's Executive Secretary, José Luis Machinea. Latin America and the High-Level Dialogue on International Migration and Development Highlights. On the Difference between Resources Generated within the Region and the Resources Available to its Residents Indicators Science, Innovation and Competitiveness: Experiences from Australia and New Zealand Recent titles Calendar of events

Notas de la CEPAL Nº 47

* América Latina y el Caribecrecerá en torno al 5% en 2006 * El papel de la familia en laprotección social * Opinión de José Luis Machinea: América Latina y el Caribefrente al Diálogo de altonivel sobre migracióninternacional y desarrollo *Precisiones: Acerca de las diferencias entrelos recursos que se generan enla región y los que estándisponibles para sus habitantes *Indicadores* Ciencia, innovación ycompetitividad: experienciasde Australia y Nueva Zelandia * Publicaciones recientes* Calendario

Crescimento e acúmulo de nutrientes em quiabeiro ‘Santa Cruz 47'

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Unesp Informa, 2013, número 47

Boletim elaborado pela Assessoria de Comunicação e Imprensa da Reitoria da UNESP