Details for: RCRC 4261, Citrus ×insitorum Mabb., 'US-812'


Summary Data
Taxonomy:
Citrus ×insitorum Mabb.
Cultivar:
'US-812'
Origin:
Developed – California, United States
Received by NPGS:
Oct 2002
Improvement Status:
Rootstock
Form Received:
Budwood
Life Form:
Tree
Life Habit:
Tree
Availability
FormQuantityNoteInventoryCart
Plant1 countPlease use comment field to indicate germplasm type being requested and quantity. RCRC 4261 PL
 
There are no images for this accession.

Core Passport Data
Taxonomy:
Citrus ×insitorum Mabb.
Cultivar:
'US-812'
Origin:
Developed – California, United States
Received by NPGS:
Oct 2002
Improvement Status:
Rootstock
Form Received:
Budwood
Life Form:
Tree
Life Habit:
Tree
Source History
Developed
1965.
California, United States
Comment: Original cross.
Developer(s):
1983.
Florida, United States
Comment: This accession was sent to the USHRL upon the closing of the USDCS in 1983, or perhaps prior to that.
Developer(s):
Donated
01 October 2002.
Florida, United States
Comment: Budwood received from Florida DPI clone DPI-814-A at F/E 19-18. CTV status 'NTF'. DPI source from original USDA parent FF-1-132-46.
Donor(s):
Accession Names and Identifiers
'US-812'
Type: Cultivar name
USDA-ARS US Horticultural Research Laboratory

RCRC 4261
Type: Site identifier

RRUT 201
Type: Site identifier
Krueger, Robert USDA, ARS

C-65-165
Type: Developer identifier
Furr, Joe USDCS

FF-1-132-46
Type: Developer identifier
USDA-ARS US Horticultural Research Laboratory

HRS-812
Type: Developer identifier
USDA-ARS US Horticultural Research Laboratory

DPI-814-X
Type: Donor identifier
Kesinger, Michael Bureau of Citrus Budwood Registration

RQ-2002-27
Type: Site identifier
Old quarantine identifier no longer used.
Krueger, Robert USDA, ARS

Narrative
Although this accession originated at the US Date and Citrus Station in Indio, California. its release was made possible by development work by Florida USDA personnel in 1980's and 1990's. According to the Release Notice (dated 05/2001), "In some Florida trials, performance of US-812 was outstanding in comparison to common commercial rootstocks in yield and fruit quality over multiple years. In all Florida trials US-812 performance was good, and trees on US-812 grew, survived well, and produced good crops of excellent quality fruit. The major attributes of this new rootstock are ease of seed propagation, resistance to severla important diseases, and favorable effects on scion tree size, health, fruit quality, and productivity...[In a trial in Polk County, Florida] Trees on US-812 rootstock...were generally of good health and medium stature, similar to trees on Carrizo...Preliminary test data suggests that US-812 is resistant to...citrus tristeza virus (CTV), citrus nemataode (Tylenchulus semipenetrans), and Phytophthora nicotianae foot and root rot. A low incidence of blight-like decline has been observed [in comparison to other rootstocks used in various trials]. This suggests that US-812 is resistant but not immune to citrus blight. Greenhouse tests with Diaprepes abbreviatus weevil indicate that US-812 is equal to Swingle in susceptibility to Diaprepes larvae feeding. US-812 rootstock is expected to be sensitive to exocortis...Meaningful evaluations of US-812 resistance to other potential biotic and abiotic problems have not yet been completed." (RRK, 09/2006)

Additional information is available here. (RR Krueger, 04/16/2020)

Citrus ×insitorum Mabb.
Genus:
Citrus
Family:
Rutaceae
Subfamily:
Aurantioideae
Tribe:
Aurantieae
Subtribe:
Citrinae
Nomen number:

490128
Place of publication:

Gard. Bull. Singapore 54:193. 2002
Comment:
a replacement name (nom. nov.) for ×Citroncirus webberi J. W. Ingram & H. E. Moore, non Citrus webberi Wester
Verified:
Name not verified.
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Homotypic Synonym(s)
×Citroncirus webberi J. W. Ingram & H. E. Moore

Common names
LanguageNameAlternate namenoteseqCitation
EnglishCarrizo citrange as ×Citroncirus webberi1Ruiz, M. et al. 2018. Molecular characterization and stress tolerance evaluation of new allotetraploid somatic hybrids between Carrizo Citrange and Citrus macophylla W. rootstocks. Front. Plant Sci. 9:901. Note: the Citrus tristeza virus is graft transmissible; 'Carrizo citrange' (Citrus × insitorum (as “C. sinensis × Poncirus trifoliata”)) is the most important graft stock of worldwide use, favoring high yield, fruit quality, and being tolerant to CTV but salt-intolerant; through somatic hybridization with Citrus × aurantiifolia (as C. macrophylla), this study obtained two hybrids; these plants combined the parental alleles, but also this study detected that most lost alleles occurred during the somatic hybridization; physiological tests showed that the somatic hybrids were tolerant to salinity; it recognized the potential of somatic hybrids SMC-58 and SMC-73 as graft stocks for areas with CTV and calcareous and saline soils
Englishcitrange as ×Citroncirus webberi1Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
Annotations
  • Nomenclature Name Change: 20 Apr 2020, from ×Citroncirus webberi J. W. Ingram & H. E. Moore to Citrus ×insitorum Mabb.
Other Links
Actions
  • ACCNUMBERD: Changed RRUT 201 to RCRC 4261. 16 Apr 2020.
Pathogens
Vouchers
Citations
  • 2001. Notice to Fruit Growers and Nuserymen Relative to the Naming and Release of the US-812 Citrus Rootstock. USDA Release Notice Note: View Number of accessions cited: 1
Pedigree
Date released:
11 May 2001
Description:
C reticulata 'Sunki' X P trifoliata 'Benecke' (source: Release Notice)