Speed Breeding of Soybean by Using 22 h Photoperiod Increases Photochemical Efficiency of Pods and Produces Six Generations Per Year.

ABSTRACT: Fast generation cycling of plants has the potential to overcome the bottleneck of traditional breeding programmes, which often require several years to achieve the desired outcomes. Recent speed breeding methodologies have reduced generation times in both short- and long-day species by optimizing environmental conditions. However, protocols for short-day plants impose a constant short-day photoperiod throughout the entire life cycle, even though plants could benefit from extended light exposure. Here, we report a speed breeding scheme for soybean (Glycine max) based on a long-day photoperiod of 22 h (LD-22 h) applied upon flowering initiation (stage R1) using light-emitting diodes (LEDs) with a cool white (6000 K) and red light (660 nm) spectrum at 550 μmol/(m²s) photosynthetic

SUBMITTER: Aciksoz SB 

PROVIDER: S-EPMC12426813 | biostudies-literature | 2025 Sep-Oct

REPOSITORIES: biostudies-literature