Lactuca virosa Linn.

2011 ◽  
Keyword(s):  
Lactuca Virosa

Die Bitterstoffe des Milchsaftes von Lactuca virosa (III. Mitteil. über Lactucarium)

1937 ◽  
Vol 70 (2) ◽  
pp. 261-263 ◽  
Author(s):  
K. H. Bauer ◽  
K. Brunner
Keyword(s):  
Lactuca Virosa

Über die Darstellung des Lactucins. 6. Mitteilung über die Bitterstoffe des Milchsaftes von Lactuca virosa L.)

1939 ◽  
Vol 277 (5) ◽  
pp. 203-206 ◽  
Author(s):  
E. Späth ◽  
G. Schenck ◽  
W. Schreber
Keyword(s):  
Lactuca Virosa

Lactuca virosa Linn.

2007 ◽  
pp. 1-1
Author(s):  
C.P. Khare
Keyword(s):  
Lactuca Virosa

scholarly journals Ueber den Unterschied zwischen Lactuca virosa und Lactuca Scariola L

1836 ◽  
Vol 19 (1) ◽  
pp. 113-114
Author(s):  
Demselben
Keyword(s):  
Lactuca Virosa

ChemInform Abstract: Sesquiterpene Lactones from Lactuca virosa L.

ChemInform ◽  
1990 ◽  
Vol 21 (8) ◽  
Author(s):  
D. GROMEK
Keyword(s):  
Sesquiterpene Lactones ◽  
Lactuca Virosa

ChemInform Abstract: Sesquiterpene Lactones in Agrobacterium rhizogenes - Transformed Hairy Root Culture of Lactuca virosa

ChemInform ◽  
2010 ◽  
Vol 27 (9) ◽  
pp. no-no
Author(s):  
W. KISIEL ◽  
A. STOJAKOWSKA ◽  
J. MALARZ ◽  
S. KOHLMUENZER
Keyword(s):  
Agrobacterium Rhizogenes ◽  
Hairy Root ◽  
Sesquiterpene Lactones ◽  
Root Culture ◽  
Hairy Root Culture ◽  
Lactuca Virosa ◽  
Transformed Hairy Root

scholarly journals Introgression of Big Vein Tolerance from Lactuca virosa L. into Cultivated Lettuce (Lactuca sativa L.)

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 881C-881 ◽  
Author(s):  
Ryan J. Hayes* ◽  
Ed Ryder ◽  
Bert Robinson
Keyword(s):  
Great Lakes ◽  
Lactuca Sativa ◽  
Infested Soil ◽  
Hybrid Progeny ◽  
Developmental Processes ◽  
Resistant Cultivars ◽  
Lactuca Virosa ◽  
Lactuca Sativa L ◽  
Congruity Backcrossing ◽  
Linkage Of Genes

Big vein (BV) disease of lettuce is caused by soil borne fungal vectored viruses, and reduces marketability through head deformation. Tolerant cultivars reduce BV frequency, but no resistant cultivars exist. L. virosa L. is highly resistance. The objectives were to 1) determine if L. virosa P.I.s exhibit variation for resistance, and 2) determine if resistance is transferable to lettuce. Seedlings were inoculated with root macerate of BV infected plants, transplanted to BV infested soil, and greenhouse grown for 3 months. Twelve plants in each of 1,2, or 3 reps of Great Lakes 65 (GL65-susceptible), Pavane (Pav-tolerant), L. virosa (11 accessions), and BC1 F2 through F5 families of lettuce cultivars x L. virosa accession IVT280 were tested. The percentage of BV afflicted plants was recorded. In hybrid families, BV free plants from tolerant families were selected and advanced. No BV was found in L. virosa. Variation for tolerance was observed in BC1 F2 and F3 families; 33% had greater tolerance than Pav (17% afflicted). Additional tests identified 11 BC1 F3 families (14%) with greater tolerance than Pav (42% afflicted). Subsequent BC1 F4 and F5 generations however, were more susceptible than Pav. Lactuca virosa is highly resistant, but resistance did not transfer to hybrid progeny. Variation for tolerance was observed in BC1 F2 and F3 families, but later generations were susceptible. Interactions or linkage of genes for developmental processes and BV resistance may hinder introgression. Introgression will continue using congruity backcrossing and a greater diversity of L. virosa.

scholarly journals New Sources of Lettuce Aphid Resistance in Lettuce

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1109A-1109
Author(s):  
James D. McCreight
Keyword(s):  
Insect Pest ◽  
Dominant Gene ◽  
The United States ◽  
Inheritance Of Resistance ◽  
Sources Of Resistance ◽  
Lactuca Virosa ◽  
Nasonovia Ribisnigri ◽  
Lactuca Serriola ◽  
Salinas Valley ◽  
Greenhouse Tests

Lettuce aphid (Nasonovia ribisnigri Mosley) is a recent insect pest to lettuce (Lactuca sativa L.) production in the United States. The single dominant gene, Nr, conditions resistance to the lettuce aphid in Lactuca virosa accession IVT280 from The Netherlands and is available in a limited number of commercial lettuce cultivars. New and genetically unique sources of resistance are sought to broaden the genetic base for resistance to the lettuce aphid. About 1200 lettuce PI lines were evaluated for resistance to lettuce aphid in greenhouse tests using a strain of lettuce aphid obtained from commercial lettuce in Salinas Valley, Calif. In 2002, plants were individually infested with five 24-hour nymphs per plant (controlled protocol), and the numbers of aphids per plant were counted 10–14 days post-infestation (dpi). Beginning in 2003, plants were mass-infested (mass protocol) with nymphs and alates of various ages and numbers. Using the mass protocol, the number of aphids per plant 10–14 dpi were estimated and categorized using a 1–5 scale where 1 = 0 aphids per plant, 2 = 1–10 aphids per plant, 3 = 11–20 aphids per plant, 4 = 21–30 aphids per plant, and 5 = >30 aphids per plant. `Salinas' and `Barcelona' were included as susceptible and resistant controls, respectively. Most of the accessions were susceptible. A few accessions had a few plants with very low numbers of aphids after repeated infestation, but their progeny were susceptible. Two accessions were highly resistant: PI 491093, a Lactuca serriola accession from Turkey, and PI 274378, a L. virosa accession from France. Inheritance of resistance in these two accessions and their allelism to Nr remains to be determined.

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