AGRONOMIC TRAITS OF SOYBEAN GENOTYPES WITHOUT LIPOXIGENASES IN THE SEEDS

CARLOS ALBERTO OSÓRIO MARTINS, CARLOS SIGUEYUKI SEDIYAMA, MAURÍLIO ALVES MOREIRA, MÚCIO SILVA REIS,VALTERLEY SOARES ROCHA E MARIA GORETI ALMEIDA OLIVEIRA

 

One way to overcome the problems associated with the undesirable beany flavor of
soybeans is the genetic elimination of lipoxygenase (Lox1, Lox2 and Lox3) enzymes from soybean
seeds. To elucidate the influence of this genetic elimination on the agronomic characteristics of
soybean plants and grain yield components, the commercial soybean variety Doko-RC and its
backcross derived lines, lacking the three lipoxygenases in the seeds (triple-null) and with these
enzymes (triple-positive), were evaluated at three sowing dates. It was concluded that the elimination
of lipoxygenase enzymes from the seeds by backcrosses did not negatively affected the agronomic
traits related to seed production, however it altered some traits related to the cycle and growth of
the plants.



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