TITLE:
Stability of Soybean Genotypes and Their Classification into Relative Maturity Groups in Brazil
AUTHORS:
José Elzevir Cavassim, João Carlos Bespalhok Filho, Luis Fernando Alliprandini, Ricardo Augusto de Oliveira, Edelclaiton Daros, Edson Perez Guerra
KEYWORDS:
Glycine max. (L.) Merrill; Genotype-Environment Interaction; Eberhart and Russell Method; AMMI
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.4 No.11,
November
13,
2013
ABSTRACT:
The stability
of soybean genotypes is very important in breeding programs for not only the
evaluation, selection, and production of cultivars but also the
establishment of parameters required for the classification of genotypes
into relative maturity groups (RMG). The aim of this study was to define stable
genotypes for traits, such as days to flowering, days to maturity, and length
of the reproductive period, and to classify them into RMG. For this
purpose, 20 commercial soybean cultivars were evaluated in 12 environments
distributed in the major producing regions of Brazil. Assessments according to
the Eberhart and Russell method and the additive main effects and
multiplicative interaction (AMMI) method were effective in the
identification of stable genotypes and their classification into RMG. These methods
can also be used collectively for this purpose. Our results showed that
the AMMI method led to a better interpretation of genotype-environment interactions.
Thus, RMG obtained on the basis of stable genotypes represented a good estimate of the
relative maturity of soybean crops throughout Brazil.
*Corresponding
author.