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Bibliographic Data
Control Number53342
Date and Time of Latest Transaction20060619141854.7
General Information060619s2002 |||||||||b ||00|||
Cataloging SourcePCARRD-DOST
Main Entry - Personal NameVillegas, Violeta N.
Main Entry - Uniform TitleEnglish
Title StatementVarietal development in papaya Violeta N. Villegas, Pablito M. Magdalita, Reynold B. Pimentel, Lolita dC. Valencia
Physical Description44p
General Note-(DOST-PCARRD Funded Proj.; RMIS Code 89-602-21)
Summary, Etc.Two hundred twenty-three germplasm materials were collected from Luzon (91), Visayas (31), Mindanao (62) and 39 were obtained from abroad. Foreign collections came from Australia (22), Thailand (8), Malaysia (4), Sri Lanka (2), El Salvador (1) Hawaii (1) and Indonesia (1). Germplasm evaluation revealed variations in terms of reaction to papaya ringspot virus (PRSV-P), plant height, petiole color and fruit quality. Genetic stocks for desirable traits were identified. Eleven inbred lines developed during the previous phase of the project are being maintained and utilized in hybridization work. Out 30 F1 hybrids generated 24 were evaluated in the field in terms of PRSV tolerance, horticultural traits and fruit quality. Four promising F1 hybrids were identified from preliminary trials done at the Institute of Plant Breeding (IPB) and from on-farm trials conducted in Batangas and Cavite. These are two medium-sized yellow-fleshed hybrids (Py5 x Py6 and Py5 x Py7), one medium-sized red-fleshed hybrid (Py3 x Py6) and one yellow-fleshed solo hybrid (Py5 x Py12). The hybrids are tolerant to PRSV and have very good fruit qualities. Seed production of Py5 and Py6 should be pursued immediately so that this hybrid can be released soon. Additional field trials of the other hybrids should be conducted to assess their performance. These are potential PRSV-tolerant varieties that could provide additional options to cater to varying consumer preferences. Micropropagation of papaya and other Carica species and interspecific hybrids has been adapted and utilized. Wide hybridization between the papaya (C. papaya) and its two wild relatives (C. cauliflora and C. quercifolia) has been initiated in an attempt to transfer PRSV resistance genes from the wild to the cultivated species
Subject Added Entry - Topical TermPapaya
 Varietal development
 Germplasm
Added Entry - Personal NameMagdalita, Pablito M.
 Pimentel, Reynold B.
 Valencia, Lolita dC.
LocationDOST PCARRD REPORTS PCARRD/SLS PCR-05-0085 1 Others 0000-00-00
  
     
 
Physical Location
Department of Science and Technology
Philippine Council for Agriculture, Forestry and Natural Resources Research and Development
  
     
 
Digital Copy
Not Available
  
     
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