Details for: W6 39945, Lactuca sativa L., 'RH08-0475'


Summary Data
Taxonomy:
Lactuca sativa L.
Cultivar:
'RH08-0475'
Origin:
Developed – California, United States
Received by NPGS:
01 Dec 2010
Improvement Status:
Breeding material
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Availability
This accession is not available. Contact site for status.
 
Images (2 total. Click on image for more.)

HEAD

Core Passport Data
Taxonomy:
Lactuca sativa L.
Cultivar:
'RH08-0475'
Origin:
Developed – California, United States
Received by NPGS:
01 Dec 2010
Improvement Status:
Breeding material
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Source History
Accession Names and Identifiers
'RH08-0475'
Type: Cultivar name

W6 39945
Type: Site identifier
Group: W6
Western Regional Plant Introduction (W6) accession numbers
USDA-ARS, WRPIS

Narrative
Breeding lines RH08-0472 and RH08-0475 are F9 iceberg type lettuces with resistance to Verticillium wilt caused by the soil dwelling fungus Verticllium dahliae. Verticillium wilt is a serious soil disease affecting a broad range of economically important crops, including lettuce. While all types of lettuce are susceptible, Verticillium wilt is most damaging to iceberg type cultivars. Plants often remain symptomless until they near harvest maturity, at which time the symptoms develop quickly. Basal or "wrapper leaves" that completely cover the outer part of the head wilt, and then collapse as the disease progresses, leading to premature plant death and an unharvestable head. Other key foliar symptoms include stunting, defoliation and other developmental abnormalities. Prior to the onset of foliar symptoms, the vascular discoloration of root and stem tissues, revealed by vertical sectioning of the plant, are the only other diagnostic features. The Verticillium wilt resistant breeding lines RH08-0472 and RH08-0475 were selected from the cross 'Tiber' x ('La Brillante' x 'Pacific'). Resistance is derived from 'La Brillante', a Batavia type lettuce cultivar with resistance to race 1 isolates of V. dahliae. These lettuces are suitable for commercial production in V. dahliae-infested and non-infested fields. RH08-0472 and RH08-0475 closely resemble 'Salinas 88', as well as 'Tiber' and 'Pacific'. The outer leaves are dull green while the internal leaves are light yellow. Leaves are wider than they are long with wavy margins, moderate savoy and minimal undulation. The apex is truncate to emarginate or notched. Heads are firm at maturity, slightly wider than tall, and occasionally oblong when viewed from the top. Ribs are flat to occasionally protruding. Days to market maturity, initiation of bolting, anthesis, and seed set are equivalent to 'Salinas 88'. Seeds are black.
Lactuca sativa L.
Genus:
Lactuca
Section:
Lactuca
Family:
Asteraceae (alt. Compositae)
Subfamily:
Cichorioideae
Tribe:
Cichorieae
Subtribe:
Lactucinae
Nomen number:

21360
Place of publication:

Sp. pl. 2:795. 1753
Verified:
10/02/1996 by ARS Systematic Botanists.
Other conspecific taxa
Lactuca sativa L. var. angustana Irish (0 active accession[s])
Lactuca sativa L. var. capitata L. (6 active accession[s])
Lactuca sativa L. var. crispa L. (0 active accession[s])
Lactuca sativa L. var. longifolia Lam. (0 active accession[s])
Lactuca sativa L. var. sativa (0 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Common names
LanguageNameAlternate namenoteseqCitation
Englishgarden lettuce  1Huxley, A., ed. 1992. The new Royal Horticultural Society dictionary of gardening
Englishlettuce  1Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
Frenchlaitue  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Frenchlaitue cultivée  2Demilly, D. et al. 2001. Liste alphabétique des principales espèces de plantes cultivées et de mauvaises herbes. Noms latins et noms français, ed. 7 GEVES-SNES, Beaucouzé, France.
GermanGarten-Lattich  2Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 1498.
Germangrüner Salat  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
GermanKopfsalat  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Italianlattuga  2International Seed Testing Association. 1982. A Multilingual Glossary of Common Plant-Names 1. Field crops, grasses and vegetables, ed. 2.
Portuguesealface  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanishlechuga  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Swedishsallat  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Koreansangchu  2Mun-Chan, B. et al. 1986. A checklist of the Korean cultivated plants. Kulturpflanze 34:105.
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Pathogens
Vouchers
Citations
Pedigree
Description:
The Verticillium wilt resistant breeding lines RH08-0472 and RH08-0475 were selected from the cross 'Tiber' x ('La Brillante' x 'Pacific').

Observations

Phenotype Data

CategoryDescriptorDescriptionValueSample SizeStudyInventoryAvailability
MORPHOLOGYHead typeHead typeCRP - CRISPHEAD LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
MORPHOLOGYHead solidityHead solidity5 - SOLID LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
MORPHOLOGYHead diameterAverage head diameter (cm)16.4 LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
MORPHOLOGYHead depthAverage head depth (cm)13.2 LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
MORPHOLOGYLeaf colorLeaf colorGR - Green LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
MORPHOLOGYLeaf crispnessLeaf crispness5 - (1 = LIMP, 6 = CRISP) LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
MORPHOLOGYFlower colorFlower colorYL - YELLOW LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
MORPHOLOGYSeed colorSeed colorBL - black (100%) LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
OTHERImage/picture1A picture or imagehead LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
OTHERImage/picture2A picture or imagehead LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available
PHENOLOGYDays to maturityActual days to average market maturity87 LETTUCE.PASSPORT.DATAW6 39945 2010o SDNot Available