Plants – Rose – Climber
Plant Patent
2000-01-24
2002-03-19
Campell, Bruce R. (Department: 1661)
Plants
Rose
Climber
Plant Patent
active
PP012480
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a new and distinct variety of papaya (
Carica papaya L.
) plant, which will hereinafter be denominated varietally as ‘Poamoho Gold’. More particularly, the invention relates to the asexual propagation of
Carica papaya L.
cv. ‘Poamoho Gold’. The new variety is a fresh market papaya for use in local markets as well as for long distance shipping.
2. Description of the Art
‘Poamoho Gold’ is a backcross 1 (second generation) hybrid produced by crossing Hawaii's major export variety, ‘Kapoho’ (pollen parent, unpatented) with an unnamed plant from the F2 progeny (seed parent) of a genetically engineered hybrid papaya ‘UH Rainbow’ (U.S. Plant patent application Ser. No. 09/300,960) which has resistance to papaya ringspot virus (PRSV), an aphid-transmitted virus which is a major disease pathogen affecting papaya production worldwide. ‘UH Rainbow’ is an F1 hybrid produced by crossing Hawaii's standard export variety ‘Kapoho’ (unpatented) with a genetically engineered, PRSV-resistant papaya, ‘UH SunUp’ (U.S. Plant patent application Ser. No. 09/301,389), a red-fleshed papaya derived from the cultivar ‘Sunset’. The pollen parent ‘Kapoho’ grown in Kahaluu, Hi., is a selection from a line discovered in the Kapoho region of Hawaii many years ago. The name of the line from which ‘Kapoho’ was derived is unknown.
The first backcross generation (BC1) seedlings from an unnamed plant of ‘UH Rainbow’ F2בKapoho’ crosses were grown in Poamoho, Kunia, Helemano, Keaau, and Kapoho, Hi. Trees at the Poamoho site were measured monthly for trunk diameter, tree height, and date and height of first flowers. At fruiting, 9 months after transplanting to the field, fruits were harvested monthly for 10 months to record sugar content, firmness, weight, shape, flavor, and flesh color.
One of the backcross generation (BC1) seedlings was selected and named ‘Poamoho Gold’. This new hybrid variety of papaya plant has been asexually reproduced by both micropropagation and rooted cuttings at the U.S. Department of Agriculture-Agricultural Research Service/Hawaii Agriculture Research Center research laboratory and greenhouse in Aiea and Maunawili, Hi., respectively. Trees reproduced by both of these methods have shown that the characteristics of this new papaya are stable and reproduce true to type in successive generations.
SUMMARY OF THE INVENTION
The new variety cv. ‘Poamoho Gold’ may be distinguished from other commercial papaya cultivars known to me by a combination of characteristics, including medium fruit size, distinctive spicy flavor, high degree of sweetness, absence of a strong odor that is unpleasant to some consumers, pleasing deep orange-yellow flesh color, smooth, waxy, and shiny skin quality generally free of deep grooves and lumps, attractive bulbous pyriform-shaped fruit, PRSV-resistance, high tree vigor, intermediate fruit bearing height, low incidence of sterility and carpellody (a low temperature response wherein the stamens and carpels fuse and form a disfigured, unmarketable fruit), and moderately firm flesh, giving good eating, handling, and shipping qualities.
REFERENCES:
U.S. patent application Ser. No. 09/300,960, ‘UH Rainbow’.
U.S. patent application Ser. No. 09/301,398, ‘UH Sun Up’.
Bell Kent L.
Campell Bruce R.
Connor Margaret A.
Fado John D.
Silverstein M. Howard
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