Temporal stability of vigor in rubber tree genotypes in the pre- and post-tapping phases using different methods

Euphytica (2012) 186:625634 DOI 10.1007/s10681-012-0688-y

REVIEW

Temporal stability of vigor in rubber tree genotypesin the pre- and post-tapping phases using different methods

Lgia Regina Lima Gouva Guilherme Augusto Peres Silva

Ceclia Khusala Verardi Juliano Quarteroli Silva

Erivaldo Jos Scaloppi-Junior Paulo de Souza Gonalves

Received: 27 October 2011 / Accepted: 2 April 2012 / Published online: 28 April 2012 Springer Science+Business Media B.V. 2012

Abstract Vigor is important in rubber tree cropping because of its association with early latex exploitation, resistance to wind breakage and wood production. The objective of the present study was to assess the vigor stability of 25 rubber tree genotypes in the pre- and post-tapping phases using different methods.

A randomized block design was used with three replications and six plants per plot. Seven annual trunk girth increments were used in the pre-tapping and six in the post-tapping phases. Stability was assessed by the methods by Wricke, Eberhart and Russell, Lin and Binns, and the AMMI statistical model (Model Additive Main Effects and Multiplicative Interaction). The association among the different stability parameters xi, ^

S2di, Pi, and IPCA 1 was veried by the Spearman correlation. Joint ANOVA showed highly signicant effects for genotypes, years, and geno-types 9 years interaction in the two phases. In the pre-tapping phase, the IAC 311 genotype was stable in all the methods and in the post-tapping presented stability in Eberhart and Russell, Wricke, and AMMI. In the post-tapping phase, the IAC 312 genotype was stable in Eberhart and Russell, AMMI and Lin and Binns. While in the pre-tapping the correlations were positive and signicant among all the parameters, in the post-tapping it only occurred between xi with ^

S2di and xi with IPCA 1. In the stability assessment of rubber tree vigor, the association among the methods depended on the assessment period. Stability methods based on different principles can show agreement in identifying stable genotypes in rubber tree vigor. The tapping procedure affected vigor stability of rubber trees.

Keywords Hevea brasiliensis Trunk girth

increment Stability parameters

Genotype 9 environment interaction

L. R. L. Gouva G. A. P. Silva C. K. Verardi

P. S. Gonalves (&)

Instituto Agronmico, Programa Seringueira, Caixa Postal 28, Campinas, SP CEP 13012-970, Brazile-mail: [email protected]

L. R. L. Gouvae-mail: [email protected]

G. A. P. Silvae-mail:...