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Soybean Maturity Groups, Environments, and Their Interaction Define Mega-environments for Seed Composition in Argentina

^a INTA Estación Experimental Manfredi. 5988 Manfredi, Córdoba, Argentina
^b INTA Estación Experimental Marcos Juárez, 2580 Marcos Juárez, Córdoba, Argentina
^c Facultad de Ciencias Agropecuarias. Avda. Valparaíso s/n, Ciudad Universitaria. 5000 Córdoba, Argentina, and Consejo Nacional de Investigaciones Científicas y Técnicas
^d Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, and Comisión de Investigaciones de la Provincia de Buenos Aires

View larger version (14K): [in a new window]   Fig. 1. GGE biplots based on seed oil content from three independent multi-environment yield trials data sets: 2000–2001, 2001–2002, and 2002–2003, respectively. Markers with roman numbers represent soybean maturity groups, and vectors represent environments.

View larger version (17K): [in a new window]   Fig. 2. Seed oil contents in soybean grain according to plantation date in four locations of the Argentinean crop region: (a) Reconquista, (b) Paraná, (c) Concepción del Uruguay, and (d) Marcos Juarez, see Table 2. Maturity groups IV (open circles) and maturity group VI (closed squares).

View larger version (23K): [in a new window]   Fig. 3. Averages and standard errors for seed oil content in cultivars of maturity group II–III, IV, and V (black bars) versus cultivars belonging to maturity group VI, VII, and VIII–IX (gray bars) in five locations of the Argentinean crop region: Salta (SA), Manfredi (MA), Marcos Juárez (MJ), Paraná (PA), and Reconquista (RE). On the x axis is the historical average temperature (November to May) of each location.

View larger version (14K): [in a new window]   Fig. 4. GGE biplots based on seed protein content from three independent multi-environment yield trials data sets: 2000–2001, 2001–2002, and 2002–2003, respectively. Markers with roman numbers represent soybean maturity groups, and vectors represent environments.

View larger version (16K): [in a new window]   Fig. 5. GGE biplots based on seed oil + protein contents from three independent multi-environment yield trials data sets: 2000–2001, 2001–2002, and 2002–2003, respectively. Markers with roman numbers represent soybean maturity groups, and vectors represent environments.