Soybean genetic progress and resource use efficiency

DEFELIPE, MATÍAS; SANTACHIARA, GABRIEL; ROTUND, JOSÉ L.

Corrientes

Simposio; XXXI Reunión Argentina de Fisiología Vegetal; 2016

Sociedad Argentina de Fisiología Vegetal

Recent retrospective studies showed a 1% annual soybean genetic gain. This genetic improvement was associated with reduced lodging, shortened vegetative phase duration and a slight reduction in seed protein concentration. However, the influence on genetic gain in resource use efficiency has been less explored. In this work, we assess the impact of genetic progress on nitrogen and radiation use efficiency of cultivar released between 1980 and 2015. The hypothesis is that the year of released will be not correlated by these processes. This is because there are different physiological strategies to attain higher yields. Additionally, we will evaluate how these efficiencies change in contrasting environments associated with drought stress.