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December 2019 – Vol. 102, No. 4

Carica papaya is one of the most economically important fruit crops in the Philippines. Its production has been affected by a disease caused by Papaya ringspot virus (PRSV) and the development of new hybrid varieties is one approach to circumvent this problem. Three new F1 hybrids that are moderately tolerant to PRSV were developed by the Papaya Breeding team of the Institute of Plant Breeding, College of Agriculture and Food Science, University of the Philippines Los Baños. The parents of the hybrids were PRSV-tolerant. They also possess desirable characteristics. These new F1 hybrids were tested in a few locations in Southern Tagalog. In addition to moderate reaction to PRSV, ‘Hirang’ (Hybrid 097 x 4172), ‘Liyag’ (Hybrid 5648 x 336), and ‘Timyas’ (Hybrid 4173 x 5648) are prolific bearers of fruits which are sweet and firm, and have juicy flesh. ‘Hirang’ has red-orange flesh while ‘Liyag’ and ‘Timyas’ have yellow to yellow orange flesh. The trees are semi-dwarf and have a thick stem.

{Photographs courtesy of Alangelico O. San Pascual Institute of Plant Breeding, College of Agriculture and Food Science, University of the Philippines Los Baños, College, Laguna, Philippines}


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