AMMI-Bootstrap in THE study of
genotype x environment (GxE) interaction in soybean

Maria Clideana Cabral MAIA[1]

 Natal Antonio VELLO[2]

Osmir José LAVORANTE[3]

Carlos Tadeu dos Santos DIAS[4]

Roland VENCOVSKY2

Maurisrael de Moura ROCHA[5]

Glauber Henrique de Sousa NUNES[6]

§    ABSTRACT: This study aimed to investigate the genotype x environment (GxE) interaction and phenotypic stability by applying AMMI (Additive Main Effects and Multiplicative Interaction Model) and bootstrap methods for evaluating seed yield of soybean lines. The material included three populations derived from a 4x4 partial diallel having four insect resistant parents and other four parents with high seed yield and earliness. From F3 to F11, selection was made from progenies for seed yield and photoperiod tolerance. The 24 experiments were carried out in randomized block design with two replications subdivided in sets with common controls. Lines of the three populations were evaluated in eight environments (E1 to E8): two locations (Anhembi, Areão), two years (1999/00, 2000/01), and two management systems (CII: intensive control of insects; CEI: ecological control of insects). The following conclusions could be drawn: all lines were classified as stable but with different stability levels. The two groups with hither stabilities included jointly at least 50% of the lines and two checks. The (AMMI + bootstrap) method detected E8 (Areão, 2000/01, CEI) as the most stable environment; on the other hand, E1 (Anhembi, 1999/00, CII) and E3 (Areão, 1999/00, CII) were classified as unstable environments.

KEYWORDS: AMMI-bootstrap; genotype x environment interaction; glycine max (L.)



[1] EMBRAPA - Empresa Brasileira de Pesquisa Agropecuária, CNPAT, Caixa Postal: 3761, CEP:  60511110, Fortaleza, CE, Brasil. E.mail: clideana@terra.com.br

[2] Departamento de Genética, Universidade de São Paulo, campus de Piracicaba – ESALQ/USP, CEP 13418-900, Piracicaba, SP, Brasil. E-mail: naavello@esalq.usp.br // rvencovs@carpa.ciagri.usp.br

[3] EMBRAPA - Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA FLORESTAS, Caixa Postal 319, CEP: 83411-000, Colombo, PR, Brasil. E.mail: osmir@cnpf.embrapa.br Departamento de Ciências Exatas, Universidade de São Paulo, campus de Piracicaba – ESALQ/USP, CEP 13418-900, Piracicaba, SP, Brasil. E-mail: ctsdias@carpa.ciagri.usp.br

[4] Departamento de Ciências Exatas, Universidade de São Paulo, campus de Piracicaba – ESALQ/USP, CEP 13418-900, Piracicaba, SP, Brasil. E-mail: ctsdias@carpa.ciagri.usp.br

[5] EMBRAPA - Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA MEIO-NORTE, CEP: 64006-220, Teresina, PI, Brasil. E.mail: mmrocha@cpamn.embrapa.br

[6] Departamento de Ciências Vegetais, Universidade Federal Rural do Semi-Árido – UFERSA, CEP 59625-900, Mossoró, RN, Brasil. E.mail: glauber@ufersa.edu.br