Development of PSB-Sy1 and PSB-Sy3, new high yielding soybean varieties
1995
Almodiente, R.B. | Pinoy, M.U. (Bureau of Plant Industry, La Carlota City (Philippines). La Granja National Crop Research and Development Center)
The Philippine Seedboard approved for commercial production two high yielding soybean varieties, namely: PSB-Sy1 and PSB-Sy3 in June, 1990 and August, 1993, respectively. The first variety is popularly known as La Carlota Soy 1 while the second as La Carlota Soy 2. These varieties were developed at the Bureau of Plant Industry, La Granja National Crop Research and Development Center, La Carlota City [Philippines]. PSB-Sy-1 or La Carlota Soy 1 is a cross between Clark 63 and AGS 129. PSB-Sy3 or La Carlota Soy 2 was developed from AGS 129 and TK 5. PSB-Sy1 had a mean yield of 2,851 kg/ha during the wet and 1,937 kg/ha in the dry season. Across locations, it outyielded the check variety UPL Sy4 by 16.33 percent and 11.49 percent in the wet and dry seasons, respectively. The seed contains 21.59 percent fat, 23.56 percent protein and 33.87 percent carbohydrates. It is accepted by Nestle in its product processing like Nestle Twin. PSB-Sy3 yielded 2,421 kg/ha and 2,041 kg/ha across locations during wet and dry seasons. It exceeded the yield of the national check PSB-Sy 1 by 22.26 percent. The seed contains 33.76 percent protein, 31.38 percent carbohydrates and 19.69 percent fat. The new varieties are moderately resistant to bacterial pustule and soybean rust diseases. They can be grown in all regions of the country and yield best in regions with types 3 and 4 climate and early dry season planting. They are recommended as rotation crops for corn and for post rice cropping in regions 2 and 4
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