‘White Zest One’, a Medium-chill, White-fleshed Peach Cultivar

in HortScience

The ‘White Zest One’ peach is being released by Texas A&M AgriLife Research to provide a firm, attractive, sweet-acid, white-fleshed peach for the medium chill zone. This peach ripens in early to mid-June depending on the location. This new white-fleshed peach is appropriate for both the commercial and home garden markets.

Origin

This variety was selected from a population of seedlings generated by the Stone Fruit Breeding and Genetics Program at Texas A&M University from a cross between TX3D45W, a white-fleshed seedling, and ‘TropicPrince’ (Tropicpeachone, USPP # 12,965; Byrne, 2002), which was planted in the high-density seedling selection field in 2004. The parents of TX3D45W are ‘TexRoyal’ (Byrne and Bacon, 1991) and a white-fleshed seedling of complex heritage with ‘O’Henry’, ‘Giant Babcock’, ‘Redwing’, and ‘Red Delight’ in its background. The seedling designated as TX3C331W was discovered in 2006 and propagated for further observation.

Two-year-old and older trees of the variety were subsequently evaluated during the 2008–13 fruit growing seasons in two medium-chill sites (College Station and Fairfield, TX) and a higher chill location (Fowler, CA). College Station, TX (lat. 30°37′ N, long. 96°22′ W, 94 m elevation) has a mean monthly temperature of its coldest month of 10.7 °C and a chilling accumulation that is generally greater than 550 chilling units (Byrne and Bacon, 1992; Sharpe, 1970; Weinberger, 1956). Fairfield, TX (lat. 31°44′ N, long. 96°10′ W, 439 foot elevation) has a mean monthly temperature of its coldest month of 8.9 °C and a chilling accumulation that is generally greater than 750 chilling units. The Fowler, CA, site (lat. 36°38′ N, long. 119°42′ W, 92 m elevation) has a mean monthly temperature of its coldest month of 8.5 °C and has a chilling accumulation that is generally above 850 chilling units (Table 1) (Byrne and Bacon, 1992; Sharpe, 1970; Weinberger, 1956). This new white-fleshed peach was productive at all three sites.

Table 1.

Chilling conditions at the College Station (TX), Fairfield (TX), and the Fowler (CA) evaluation sites.

Table 1.

Description

‘White Zest One’ (TX3C331W) is productive in the medium-chill zones where cultivars such as ‘TexKing’ (Byrne and Bacon, 2004), ‘TexRoyal’, ‘June Gold’ (Brooks, 1958), and ‘Scarlet Pearl’ (Okie, 1993) are adapted. ‘White Zest One’ bloomed ≈4 to 5 d before ‘June Gold’, 2 weeks before ‘Scarlet Pearl’, and with or slightly before ‘White Delight One’ and ‘White Delight Two’ (Byrne and Anderson, 2013). Thus, their chilling requirement is ≈500 to 550 chill units. ‘White Zest One’ has showy flowers.

In the medium-chill zone of Texas (Fairfield), ‘White Zest One’ bears a crop of white, melting-flesh peaches with a sweet-acid flavor that are firm, attractive, semifreestone to freestone with medium–large to large size fruit (Tables 2 and 3). The fruit is round to slightly ovate with a cream-white flesh and ground color and a 60% to 70% light to dark red over color with many degrees of shading and blending occurring between these colorations. Under lower chill conditions (College Station and Floresville), this new cultivar may develop a small tip and a slight suture bulge. The fruit flesh does not brown readily nor has it shown a tendency to develop split or shattered pits during the final stage of fruit swelling. The quality of this cultivar is equal to or better than that of the other major cultivars in terms of flesh firmness, percent red blush, shape, ground color, appearance, flavor, and soluble solids (Tables 2 and 3; Fig. 1).

Table 2.

Fruiting characteristics of ‘White Zest One’ peach compared with seven commercial peach cultivars at Fairfield, TX (2008–12) arranged by ripe date.

Table 2.
Table 3.

Fruiting characteristics of ‘White Zest One’ peach compared with six medium chill peach cultivars at Fowler, CA (2008–13) arranged by ripe date.

Table 3.
Fig. 1.
Fig. 1.

Fruit of ‘White Zest One’ as produced in the San Joaquin Valley in California (left) and the medium chill zone of Texas (right).

Citation: HortScience horts 50, 2; 10.21273/HORTSCI.50.2.315

In the medium-chill zone of Texas, this cultivar is picked from early June until mid-June depending on the year and the site of the orchard. The average time of harvest for Fairfield, TX, was 8 June, which was ≈10 d after ‘June Gold’ and 7 to 9 d before ‘Scarlet Pearl’ and ‘White Delight Two’ (Table 2).

The stone is normally ovoid to elongated and has a medium size with the dimensions of 32 to 33 mm in length, 25 to 27 mm in width, and ≈18 to 20 mm in thickness.

The ‘White Zest One’ tree is vigorous with the typical semispreading growth habit of a peach tree as is seen in ‘TexKing’, ‘TexPrince’, and ‘TexRoyal’. No observations have been made on resistance for either peach rust (Tranzschelia discolor) or bacterial leaf spot [Xanthomonas campestris pv. pruni (E. F. Smith) Dye]. The moderately large leaves are lanceolate with crenulate margins and have two to three reniform petiolar glands.

Availability

Requests for budwood should be directed to the Texas A&M University System’s Office of Technology Commercialization. This cultivar is the subject of a plant patent application.

Literature Cited

  • BrooksR.M.1958Double Delight, Earligold, and June Gold peachesFruit Var. J.322

  • ByrneD.H.2002Tropicpeachone. Patent application. Patent awarded 17 Sept. 2002. USPP 12:965

  • ByrneD.H.AndersonN.2013‘White Delight’ peach series: Four medium-chill subacid white-fleshed peachesHortScience4810561058

  • ByrneD.H.BaconT.A.1991‘TexRoyal’, a medium chilling peachHortScience2613381340

  • ByrneD. H.BaconT. A.1992Chilling estimation: Its importance and estimationThe Texas Horticulturist185 89

  • ByrneD.H.BaconT.A.2004‘TexKing’, an early ripening medium chill peachHortScience39442443

  • OkieW.R.1993‘Goldprince’ and ‘Scarletpearl’ peachesHortScience28231

  • SharpeR.H.1970Sub-tropical peaches and nectarinesFla. State Hort. Soc.82302306

  • WeinbergerJ.H.1956Prolonged dormancy trouble in peaches in the southeast in relation to winter temperaturesProc. Amer. Soc. Hort. Sci.67107112

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Contributor Notes

To whom reprint requests should be addressed; e-mail dbyrne@tamu.edu.

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    Fruit of ‘White Zest One’ as produced in the San Joaquin Valley in California (left) and the medium chill zone of Texas (right).

Article References

  • BrooksR.M.1958Double Delight, Earligold, and June Gold peachesFruit Var. J.322

  • ByrneD.H.2002Tropicpeachone. Patent application. Patent awarded 17 Sept. 2002. USPP 12:965

  • ByrneD.H.AndersonN.2013‘White Delight’ peach series: Four medium-chill subacid white-fleshed peachesHortScience4810561058

  • ByrneD.H.BaconT.A.1991‘TexRoyal’, a medium chilling peachHortScience2613381340

  • ByrneD. H.BaconT. A.1992Chilling estimation: Its importance and estimationThe Texas Horticulturist185 89

  • ByrneD.H.BaconT.A.2004‘TexKing’, an early ripening medium chill peachHortScience39442443

  • OkieW.R.1993‘Goldprince’ and ‘Scarletpearl’ peachesHortScience28231

  • SharpeR.H.1970Sub-tropical peaches and nectarinesFla. State Hort. Soc.82302306

  • WeinbergerJ.H.1956Prolonged dormancy trouble in peaches in the southeast in relation to winter temperaturesProc. Amer. Soc. Hort. Sci.67107112

    • Search Google Scholar
    • Export Citation

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