Data/hora: 25/06/2024 10:20:15

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 24/05/1993
Data da última atualização: | 24/05/1993
Autoria: | LANDRY, B. S.; KESSELI, R. V.; FARRARA, B.; MICHELMORE, R. W.
Afiliação: | Department of Vegetable Crops, University of California, Davis, California 95616.
Título: | A genetic map of lettuce (Lactuca sativa L.) with restriciton fragment length polymorphism, isozyme, disease resistance and morphological markers.
Ano de publicação: | 0
Fonte/Imprenta: | Genetics, v.116, p.331-337, l987
Idioma: | Inglês
Conteúdo: | A detailed linkage map of lettuce was constructed using 53 genetic markers including 41 restriction fragment length polymorphism (RFLP) loci, five downy mildew resistance genes, four isozyme loci and three morphological markers. The genetic markers were distributed into nine linkage groups and cover 404 cM which may be 25-30% of the lettuce genome. The majority (31 of 34) of the RFLP probes detected single segregating loci, although seven of these may have been homologous to further monomorphic loci. When several loci were detected by a single probe, the loci were generally linked, suggesting tandem duplications. One proble howerer, detected loci in three linkage groups suggesting translocations. The five downy mildew resistance genes (Dm1, Dm3, Dm4, Dm5/8 andDm 13). segregating in the Calmar X Kordaat cross, represented each of the four resistance gene linkage groups. Dm5/8 is flanked by two cDNA loci, each located 10 cM away. These flanking markers will be used to study the source of variation in downy mildew genes and are also part our strategy to clone resistance genes.
Thesagro: | DNA; Melhoramento; Mercado.
Thesaurus Nal: | clones.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (15266-1) - ADC - SP - -- - S5427 -  - S5427 - DIS