Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/769321
Registro completo de metadados
Campo DCValorIdioma
dc.contributor.authorNAGATA, R. T.
dc.contributor.authorDUSKY, J. A.
dc.contributor.authorTORRES, A. C.
dc.contributor.authorCANTLIFEE, D. J.
dc.date.accessioned2024-10-14T12:53:41Z-
dc.date.available2024-10-14T12:53:41Z-
dc.date.created2001-02-05
dc.date.issued1992
dc.identifier.citationProceedings Florida State Horticulture Society, v. 105, p. 358-361, 1992.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/769321-
dc.descriptionWeed control measures for lettuce, Lactuca sativa L. on south Florida high organic soils (>70%) can exceed $600 per acre due to the high use of manual labor. Available chemical herbicides are ineffective for broad spectrum control of weeds. It is the aproach of the lettuce breeding program of weeds. It is the aproach of the lettuce breeding program of the University of Florida to develop herbicide tolerant lettuce cultivanrs through classical and gene splicing methodology. Sulfonylurea herbicide resistance was derived from prickly lettuce, L serriola L and backcrossed into crisphead, cos, bibb and leaf lettuce thet have desirable disease resistance and commercial quality. Inheritance of the herbicide resistance was through an incomplete dominance gene action. Good expression of resistance in lettuce was observed at 2 oz/acre rate of imazethapyr. Segregation ratios for backcrossing was 1:1, tolerantrsusceptible. F2 segregation for resistance:tolerant:susceptible was in a 1:2:1 ratio. Breeding lines of leaf, cos, crisphead and butterheads resistant and tolerant to sul fonylurea herbicides have been developed. Closed heading types are progressing slower than open head types due to multiple genes involved in heading. Glyphosate resistance was bioengineered into 'South Bay7 lettuce through the use of Agrobacterium tumefaciens as the vector. A total of 73 individual family lines, each representing a independent transformation event have been generated. Seed were collected for each line. Initial screening of regenerated 'South Bay' crisp head lettuce with the incorporated gene have indicated good resistance to glyphosate at a use rate of 2 Ib/acre. The mechanism of gene action is believed to be dominant. Homo-zygous lines have been identified and studies are continuing.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectTolerancia
dc.subjectGlisofato
dc.subjectPlanta daninha
dc.subjectAgrobacterium tumaefaciens
dc.subjectTolerance
dc.titleDevelopment and breeding of herbicide tolerant lettuce.
dc.typeArtigo de periódico
dc.subject.thesagroAlface
dc.subject.thesagroBiotecnologia
dc.subject.thesagroErva Daninha
dc.subject.thesagroHerbicida
dc.subject.thesagroLactuca Sativa
dc.subject.thesagroMelhoramento
dc.subject.nalthesaurusbreeding
dc.subject.nalthesaurusglyphosate
dc.subject.nalthesaurusherbicides
dc.subject.nalthesauruslettuce
dc.subject.nalthesaurusweeds
riaa.ainfo.id769321
riaa.ainfo.lastupdate2024-10-14
dc.contributor.institutionANTONIO CARLOS TORRES, CNPH.
Aparece nas coleções:Artigo em periódico indexado (CNPH)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
AP-CNPH-1992-p358-361.pdf459.15 kBAdobe PDFThumbnail
Visualizar/Abrir
Mostrar registro simples do item Visualizar estatísticas

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace