认识唐纳森：一种在黄龙病环境下具有潜力的甜橙2.pdf

1、HORTSCIENCE60(3):362368.2025.https:/doi.org/10.21273/HORTSCI18351-24The Rediscovery of Donaldson SweetOrange,a Variety That Has Potentialfor Use in Orange JuiceMatthew Mattia,Anne Plotto,and Giancarlo BuzziUS Horticultural Research Laboratory,USDA,ARS,Fort Pierce,FL34945,USAMuhammad Shahid and Zhen

2、FanDepartment of Horticultural Science,University of Florida,Gainesville,FL 32611,USAKristen Jeffries,Gabriela Olmedo,Thais Freitas,and Jinhe BaiUS Horticultural Research Laboratory,USDA,ARS,Fort Pierce,FL 34945,USAKeywords.citrus industry,Donaldson,Hamlin,Huanglongbing,orange juice,sweet orangeAbst

3、ract.In Summer 2021,a comprehensive evaluation of germplasm for the US De-partment of Agriculture(USDA),Agricultural Research Service(ARS)citrus breed-ing program was conducted to assess all citrus scions that may have commercialpotential for use in not-from-concentrate orange juice(NFCOJ)to support

4、 Floridascitrus industry that has been ravaged by Huanglongbing(HLB),causing productionlosses of 90%.The Donaldson sweet orange tree(Citrus sinensis)stood out as beingexceptionally healthy compared with industry standards that were planted close byand were in decline or had died.The tree tested posi

5、tive for the presence of Candida-tus Liberibacter asiaticus(CLas),the presumed causal agent of HLB,indicating thatthe tree may have tolerance to HLB,as that tree was planted more than 30 years ago.The fruit was displayed at a field day in Dec 2021;the healthy-looking tree attractedgrowers attention

6、and generated a records search for information.This is the onlymature tree growing at the USDA,ARS Whitmore Foundation Farm.The resultsshow that Donaldson is an early season sweet orange variety that matures fromDecember to January in HLB endemic conditions and has juice as a potential substitutefor