Disease Resistance of ‘MP-29’, a Clonal Interspecific Hybrid Rootstock for Peach, in Post-release Trials

in HortScience

The primary focus of the stone fruit rootstock program at Byron, GA, has been the development of disease-resistant rootstocks for peach (Prunus persica L. Batsch). Historically peach tree short life (PTSL), aka bacterial canker complex, and Armillaria root rot (ARR) have been the two most important causes of premature mortality of commercial peach trees in the southeastern United States. Guardian®, a seedling peach rootstock, was cooperatively released in 1993 by the U.S. Department of Agriculture (USDA)-Agricultural Research Service (ARS) and Clemson University. It has since been widely adopted by the southeastern peach industry. As a result, trees losses to PTSL have declined sharply. However, Guardian, like most other peach seedling rootstocks, is susceptible to ARR. ARR has now moved to the forefront as the primary cause of premature peach tree death in the Southeast. In response to this threat, the USDA-ARS in cooperation with the University of Florida, released ‘Sharpe’, a plum hybrid rootstock in 2007. Despite its broad disease resistance, ‘Sharpe’ proved unsuited for widespread commercial utilization due to its relatively poor cropping performance. In 2011, ‘MP-29’, a semidwarf, clonal, plum × peach hybrid, was released for commercial trial. ‘MP-29’s broad disease and nematode resistance, in combination with its dwarfing ability and excellent productivity, offered great promise for use in this production area and in others suffering from similar issues. Since its release, testing of ‘MP-29’ has continued both in researcher and grower trials. To date, performance has exceeded all expectations.

Contributor Notes

Research Horticulturist.

Upstate Peach Extension Specialist.

Farm Manager (retired).

Assistant Professor.

Associate Professor.

Corresponding author. E-mail: tom.beckman@ars.usda.gov.

Article Sections

Article Figures

  • View in gallery

    Monthly rainfall (cm) received at the Byron, GA, location in 2013.

  • View in gallery

    Time course of tree mortality of ‘Redhaven’ peach budded on three rootstocks over 17 years on a severe ARR and PTSL site at the Byron location (2000–16).

Article References

  • AdaskavegJ.E.SchnabelG.ForsterH.2008Diseases of peach caused by fungi and fungal-like organisms: Biology Epidemiology and Management p. 352–406. In: D.R. Layne and D. Bassi (eds.). The Peach. Botany Production and Uses. CAB International Wallingford UK

  • BeckmanT.G.2011Progress in developing Armillaria resistant rootstocks for use with peachActa Hort.903215220

  • BeckmanT.G.NyczepirA.P.2005Peach tree short life p. 199–205. In: D. Horton and D. Johnson (eds.). Southeastern Peach Growers’ Handbook. G.E.S. Handbook No. 1 University of Georgia Athens GA

  • BeckmanT.G.ChaparroJ.X.2015Peach rootstock development for the southeastern United StatesActa Hort.1084171178

  • BeckmanT.G.PuseyP.L.2001Field testing peach rootstocks for resistance to Armillaria root rotHortScience36101103

  • BeckmanT.G.ChaparroJ.X.ShermanW.B.2012MP-29, a clonal interspecific hybrid rootstock for peachHortScience47128131

  • BeckmanT.G.ChaparroJ.X.ShermanW.B.2008‘Sharpe’, a clonal plum rootstock for peachHortScience4322362237

  • BeckmanT.G.OkieW.R.NyczepirA.P.ReighardG.L.ZehrE.I.NewallW.C.1997History, current status and future potential of Guardian™ (BY520-9) peach rootstockActa Hort.451251258

    • Search Google Scholar
    • Export Citation
  • GomezK.A.GomezA.A.1984Statistical procedures for agricultural research. Wiley New York NY

  • MillerR.W.1994Estimated peach tree losses 1980 to 1992 in South Carolina—Causes and economic impact p. 121–127. In: A.P. Nyczepir P.F. Bertrand and T.G. Beckman (eds.). Proc. 6th Stone Fruit Decline Workshop 26–28 October 1992 Ft. Valley GA

  • OkieW.R.BeckmanT.G.NyczepirA.P.ReighardG.L.NewallW.C.ZehrE.I.1994aGuardian (BY520-9), a peach rootstock for the southeastern United States that increases scion longevityHortScience29705706

    • Search Google Scholar
    • Export Citation
  • OkieW.R.ReighardG.L.BeckmanT.G.NyczepirA.P.ReillyC.C.ZehrE.I.NewallW.C.JrCainD.W.1994bField screening prunus for longevity in the southeastern United StatesHortScience29673677

    • Search Google Scholar
    • Export Citation
  • RhoadsA.S.1954Clitocybe root rot found widespread and destructive in Georgia and South Carolina peach orchardsPlant Dis. Rptr.384246

  • SAS Institute Inc.2010SAS for Windows Version 9.3 SAS Institute Inc. Cary NC

  • SavageE.F.WeinbergerJ.H.LuttrellE.S.RhoadsA.S.1953Clitocybe root rot – a disease of economic importance in Georgia peach orchardsPlant Dis. Rptr.37269270

    • Search Google Scholar
    • Export Citation
  • SchnabelG.AshJ.S.BrysonP.K.2005Identification and characterization of Armillaria tabescens from the southeastern United StatesMycol. Res.10911638641

    • Search Google Scholar
    • Export Citation
  • ShermanW.B.LyreneP.M.SharpeR.H.1991Flordaguard peach rootstockHortScience26427428

Article Information

Google Scholar

Related Content

Article Metrics

All Time Past Year Past 30 Days
Abstract Views 125 125 28
Full Text Views 33 33 4
PDF Downloads 17 17 1