Evaluation of sweet potato AVRDC [Asian Vegetable Research and Development Center, Taiwan] varieties under Philippine conditions
1985
Eusebio, D.E. (Economic Garden, Los Banos, Laguna (Philippines))
Four studies were conducted at Economic Garden as follows: (1) Sweet Potato Germplasm Collection and Maintenance, (2) Preliminary Yield Trial (PYT), (2) General Yield Trial (GYT), and (4) Weevil Resistance Study. Under germplasm collection, one hundred sixty local and foreign sweet potato cultivars/accessions and lines are maintained in the station. For PYT (Set 1), only one entry (C1 946-30) among 16 entries planted with marketable yield of 7.4 tons/ha surpassed the yield of BNAS (check) with 7.2 t/ha but was not significantly different. On the other hand, PYT (Set 2) with 23 entries showed seven promising entries namely: C1 693-9, C1 949-1, C1 951-6 and C1 690-18 showed no significant differences at 5% and 1% over BNAS (check) in terms of marketable root yield. It was noteworthy that the highest yielder (C1 693-9) which consistently performed well in the regional trial was approved by the Philippine Seed Board in June 1985 and named BPI Sp-2 for release in commercial production. Lastly, under weevil resistance study, ten varieties significantly outyielded the BNAS (check). However, only one of these ten proved to be moderately resistant to weevil. The rest are all susceptible
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