Development of PSB Sp 20
1998
Abaquita, M.B. | Aala, O.G.
PSB Sp 20 locally known as LG 19A-10 is a sweetpotato variety released for commercial planting on November 12, 1997 upon the approval of the National Seed Industry Council (NSIC) through the recommendation of the Technical Working Group for Rootcrops. The variety was developed by polycross technique at the La Granja National Crop Research and Development Center of the Bureau of Plant Industry, La Carlota City, Negros Occidental [Philippines]. Prior to its release as a variety, it was subjected to the pre-regional and regional yield trials of the National Cooperative Testing (NCT). The test locations were: IPB-UPLB, College, Laguna; QAES, Tiaong, Quezon; NPRCRTC-BSU, La Trinidad, Benguet; AES, Tobaco, Albay; PRCRTC, ViSCA, Leyte; BES, Ubay Bohol; UPLBCARTS, La Carlota City, Negros Occidental; USM, Kabacan, North Cotabato; and NORMIARC-DES, Dalwangan, Malaybalay, Bukidnon. This new variety had a mean root yield of 11.08 t/ha across the nine testing locations in the country. The long elliptic-shaped root have red skin and light yellow flesh with 51.80 percent starch, 4.20 percent protein, and 6.13 percent sugar (dry weight bases). The taste acceptability rating is 7.20 (like moderately). It has a dry matter yield of 31.95 percent. The plant is semi-bushy with green foliage and matures in 100 to 120 days. It is moderately susceptible to weevil and scab. PSB 20 thrives well in Western and Eastern Visayas and in Northern and Southern Mindanao
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