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Fernanda Souza Lopes, Monik Evelin Leite, Antonio Carlos Mota Porto, Luciana Aparecida Miguel, Vanessa de Oliveira Lima Reis and João Bosco dos Santos

Abstract: The objectives of this study were to estimate the genetic progress
of mass selection for white mold resistance in common bean, evaluated in
a greenhouse in cycle XII of recurrent selection (900 S0 plants), and compare
it with field selection in previous cycles. In addition, progress was compared
with microsatellite marker-assisted selection (MAS) among S0:1 progenies. The
79 most resistant S0:1 were evaluated under field conditions using a 9×9 simple
lattice design; the 21 best S0:2 and those selected from cycles IX, X, and XI were
evaluated in a 6×6 triple lattice. Genetic progress was 4.25% per cycle, and
12.17% between cycles XI and XII, showing higher selection efficiency in the
greenhouse. The phenotypic gain and gain from assisted selection among the
S0:1 progenies were 5.08 and 1.57%, respectively, and the low value of MAS
was due to only two markers (BM189 and BMD20) explaining the resistance.

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