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Poor forage quality, especially during the dry season, is a major constraint for livestock producers in the Caribbean. Livestock in the humid tropics often lack sufficient protein in their diets resulting in reduced growth rates and lower milk production (Adjei, 1995). The production of forage from legumes such as soybeans [Glycine max (L.) Merr.] may be an option for livestock producers. Forage soybean cultivars can produce good quality forage with high yields of crude protein (Seiter et al., 2004; Sheaffer et al., 2001). These soybean cultivars also need the capacity to produce acceptable yields of high-quality forage. The performance of soybean cultivars developed for forage production (Devine and Hatley, 1998) has been tested in different regions of the United States (Rao et al., 2005; Seiter et al., 2004; Sheaffer et al., 2001). Less information is available, however, concerning the performance of forage soybeans in the tropics. Most maturity groups of soybeans planted in the lower latitudes of the tropics are short and yield insufficient amounts of biomass for forage production. The long-juvenile (LJ) trait delays flowering of soybeans under short-day conditions (Ray et al., 1995). This LJ trait, which is controlled by a simple recessive gene, can be introgressed into soybeans to increase biomass production for forage production in the tropics and sub-tropics. This approach led to the development and release of 'Hinson Long-Juvenile' forage soybean in Florida (Blount et al., 2003). The main objective of this research was to select soybean lines that are adapted to the humid tropics and capable of producing high-quality forage. A secondary objective was to identify soybean lines capable of producing adequate yields during the winter months for seed production. PR0968-1-1 and PR0968-16-2 are soybean germplasm lines adapted to the humid tropics that were developed and released cooperatively in 2015 by the UPR Agricultural Experiment Station and the USDA-ARS.

RELEASE OF PR0968-1-1 AND PR0968-16-2 FORAGE SOYBEAN GERMPLASM LINES