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Control Number58320
Date and Time of Latest Transaction20060619142910.9
General Information060619s |||||||||b ||00|||
Cataloging SourcePCARRD-DOST
Main Entry - Personal NameBacusmo, Jose L.
Main Entry - Uniform TitleENGLISH
Title StatementBreeding for yield, quality and resistance to sweet potato weevil (Cylas formicarius Fab) and scab (Sphaceloma batatas Saw)
General NoteBaybay, Leyte: PRCRTC, 1995. 26 p
Summary, Etc.Of the 25,794 genotypes evaluated under field screening, 60 were moderately resistant and one resistant to weevil. However, all exhibited susceptible reactions under forced feeding experiments. Field screening and forced feeding experiments showed low level resistance to sweet potato weevil in the F1's (from parents with low level of resistance). The resistance was not expressed when the weevil population was high and when the weevil had no options of susceptible cultivars. However, the available resistance may prove useful when used with other components of IPM for weevil. No apparent relations were observed between weevil resistance/preference to morphological traits such as presence of latex content, length of root neck and periderm thickness. High level and relatively stable scab resistance was observed in F1 progenies even under high inoculum pressure. Scab resistance was highly correlated with number of stomates and leaf width. Resistant genotypes had lesser number of stomates and narrow leaf width than the susceptible ones. Incubation period was also longer in resistant than in susceptible genotypes. After five years of breeding and screening for weevil and scab resistance, one genotype was recommended to the Philippine Seed Board in 1991 and was released as a variety called PSBSp 13 commonly known as "Red Wonder". This variety has good yield, moderate resistance to weevil and high resistance to scab. Screening for processing qualities showed that a number of clones from Centro International de la Papa (CIP) can be used as raw materials for sweet potato-based products. Clone TN 66 proved to be good material for both SP catsup and dehydrated SP
Subject Added Entry - Topical TermSWEET POTATOES
Added Entry - Personal NameVasquez, Erlinda A.
 Godoy, Federico Jr. P.
 Godoy, Cynthia V.
 Lauzon, Roberta D.
 Chujoy, E.
Physical Location
Department of Science and Technology
Philippine Council for Agriculture, Forestry and Natural Resources Research and Development
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