02458naa a2200253 a 450000100080000000500110000800800410001902200140006002400390007410000190011324501110013226000090024350006300025252010280088265300170191065300290192765300200195665300120197670000170198870000160200570000160202170000210203777301460205810633122022-06-16       2022    bl uuuu     u00u1 u    #d  a1518-78537 a10.1590/1984-70332022v22n1a062DOI1 aGALLINO, J. P.  aA simple and inexpensive procedure to more quickly obtain new varieties in soybean.h[electronic resource]  c2022  aArticle history: Received 24 May 2021; Accepted 12 Aug 2021; Published 30 Mar 2022; Publication in this collection 04 May 2022;  Date of issue 2022. Corresponding author:  Gallino, J.P.; INIA, Estación Experimental "Wilson Ferreira Aldunate", Las Brujas, Ruta 48, km 10, Rincón del Colorado, Canelones, Uruguay; email:jpgallino@gmail.com -- The authors thanks the Instituto Nacional de Investigación Agropecuaria (INIA) for financial support and use of facilities. License: This is an open-access article distributed under the terms of the Creative Commons Attribution License: https://creativecommons.org/licenses/by/4.0/  aABSTRACT - Soybean (Glycine max L.) is one of the four most important crops in the world. The creation of new commercial varieties is a long-term activity that requires from seven to eight years from the beginning of the cross design up to registration for commercialization of cultivars. Rapid generation advance (RGA) is a technique that consists of controlling external factors that affect plant growth with the aim of shortening the sowing to harvest cycle. In the present study, an optimized method is described that can accelerate soybean breeding by means of RGA using inexpensive facilities and that can be easily applied by breeders. Our breeding method uses a modified cold storage chamber fitted with fluorescent lamps delivering a 12/24 h light photoperiod, while temperature is set at 24 °C. This method allows development of up to 5 generations per year instead of the 1-2 generations currently possible under field or greenhouse conditions. © 2022, Brazilian Society of Plant Breeding. All rights reserved.  aGenetic gain  aRapid generation advance  aSelection cycle  aSoybean1 aCASTILLO, A.1 aCERETTA, S.1 aESTEVES, P.1 aBONNECARRERE, V.  tCrop Breeding and Applied Biotechnology, 2022, volume 22, Issue 1, e38212216. OPEN ACCESS. doi: https://doi.org/10.1590/1984-70332022v22n1a06