INVESTIGADORES
KAMENETZKY Laura
congresos y reuniones científicas
Título:
Dissecting tomato quantitative molecular locus into their principal determinant genes.
Autor/es:
ASIS R.; URIAS U.; MILSTEIN D.; KAMENETZKY L.; HOPP E.; VAN SLUYS M.A.; FERNIE A. R.; ROSSI M.; CARRARI F.
Lugar:
Chile
Reunión:
Congreso; REDBIO; 2007
Resumen:
The development and maturation of tomato fruits has received considerable attention because of both the uniqueness of such processes to the biology of plants and the importance of these fruits as a component of the human diet. Molecular and genetic analysis of fruit development, and especially ripening of fleshy fruits, has resulted in significant gains in The development and maturation of tomato fruits has received considerable attention because of both the uniqueness of such processes to the biology of plants and the importance of these fruits as a component of the human diet. Molecular and genetic analysis of fruit development, and especially ripening of fleshy fruits, has resulted in significant gains in knowledge over recent years (Adams-Phillips et al, 2004; Giovannoni, 2001, 2004). A large amount of knowledge has been gathered on ethylene biosynthesis and response, cell wall metabolism, and environmental factors, such as light, that impact ripening. Considerably less attention has, however, been paid directly to the metabolic shifts that underpin these responses. Given the vast complexity of fruit metabolism, the necessity of a broader systems-orientated approach is now crucial in order to take advantage of the new genomic tools available and gather the knowledge leading to the development of practical tools to control fruit taste quality. Tomato cultivated varieties present extremely low levels of genetic variability and populations derived from cross hybridisation with related species often present sterility problems which exert uncontrollable effects on QTLs of interest. Therefore, studies have mainly focussed on abiotic stresses, disease resistances and plant morphological variations. To solve this problem, many researchers and geneticists have been advocated to create populations with broader genetic bases through the incorporation of wild exotic germplasm by molecular assisted selection. One such an example is the Solanum pennellii IL population composed of 76 immortalized nearly isogenic lines, developed through a succession of backcrosses with a cultivated processing variety of tomato, Solanum lycopersicum, CV M82. Each line in the population carries a single marker-defined ‘exotic’ chromosome segment, and the lines provide a complete coverage of the donor genome. This material has already served to add several valuable agronomic traits to the genetic background available for breeding programs with different objectives (Fridman et al, 2000; 2004). knowledge over recent years (Adams-Phillips et al, 2004; Giovannoni, 2001, 2004). A large amount of knowledge has been gathered on ethylene biosynthesis and response, cell wall metabolism, and environmental factors, such as light, that impact ripening. Considerably less attention has, however, been paid directly to the metabolic shifts that underpin these responses. Given the vast complexity of fruit metabolism, the necessity of a broader systems-orientated approach is now crucial in order to take advantage of the new genomic tools available and gather the knowledge leading to the development of practical tools to control fruit taste quality. Tomato cultivated varieties present extremely low levels of genetic variability and populations derived from cross hybridisation with related species often present sterility problems which exert uncontrollable effects on QTLs of interest. Therefore, studies have mainly focussed on abiotic stresses, disease resistances and plant morphological variations. To solve this problem, many researchers and geneticists have been advocated to create populations with broader genetic bases through the incorporation of wild exotic germplasm by molecular assisted selection. One such an example is the Solanum pennellii IL population composed of 76 immortalized nearly isogenic lines, developed through a succession of backcrosses with a cultivated processing variety of tomato, Solanum lycopersicum, CV M82. Each line in the population carries a single marker-defined ‘exotic’ chromosome segment, and the lines provide a complete coverage of the donor genome. This material has already served to add several valuable agronomic traits to the genetic background available for breeding programs with different objectives (Fridman The development and maturation of tomato fruits has received considerable attention because of both the uniqueness of such processes to the biology of plants and the importance of these fruits as a component of the human diet. Molecular and genetic analysis of fruit development, and especially ripening of fleshy fruits, has resulted in significant gains in knowledge over recent years (Adams-Phillips et al, 2004; Giovannoni, 2001, 2004). A large amount of knowledge has been gathered on ethylene biosynthesis and response, cell wall metabolism, and environmental factors, such as light, that impact ripening. Considerably less attention has, however, been paid directly to the metabolic shifts that underpin these responses. Given the vast complexity of fruit metabolism, the necessity of a broader systems-orientated approach is now crucial in order to take advantage of the new genomic tools available and gather the knowledge leading to the development of practical tools to control fruit taste quality. Tomato cultivated varieties present extremely low levels of genetic variability and populations derived from cross hybridisation with related species often present sterility problems which exert uncontrollable effects on QTLs of interest. Therefore, studies have mainly focussed on abiotic stresses, disease resistances and plant morphological variations. To solve this problem, many researchers and geneticists have been advocated to create populations with broader genetic bases through the incorporation of wild exotic germplasm by molecular assisted selection. One such an example is the Solanum pennellii IL population composed of 76 immortalized nearly isogenic lines, developed through a succession of backcrosses with a cultivated processing variety of tomato, Solanum lycopersicum, CV M82. Each line in the population carries a single marker-defined ‘exotic’ chromosome segment, and the lines provide a complete coverage of the donor genome. This material has already served to add several valuable agronomic traits to the genetic background available for breeding programs with different objectives (Frid The development and maturation of tomato fruits has received considerable attention because of both the uniqueness of such processes to the biology of plants and the importance of these fruits as a component of the human diet. Molecular and genetic analysis of fruit development, and especially ripening of fleshy fruits, has resulted in significant gains in knowledge over recent years (Adams-Phillips et al, 2004; Giovannoni, 2001, 2004). A large amount of knowledge has been gathered on ethylene biosynthesis and response, cell wall metabolism, and environmental factors, such as light, that impact ripening. Considerably less attention has, however, been paid directly to the metabolic shifts that underpin these responses. Given the vast complexity of fruit metabolism, the necessity of a broader systems-orientated approach is now crucial in order to take advantage of the new genomic tools available and gather the knowledge leading to the development of practical tools to control fruit taste quality. Tomato cultivated varieties present extremely low levels of genetic variability and populations derived from cross hybridisation with related species often present sterility problems which exert uncontrollable effects on QTLs of interest. Therefore, studies have mainly focussed on abiotic stresses, disease resistances and plant morphological variations. To solve this problem, many researchers and geneticists have been advocated to create populations with broader genetic bases through the incorporation of wild exotic germplasm by molecular assisted selection. One such an example is the Solanum pennellii IL population composed of 76 immortalized nearly isogenic lines, developed through a succession of backcrosses with a cultivated processing variety of tomato, Solanum lycopersicum, CV M82. Each line in the population carries a single marker-defined ‘exotic’ chromosome segment, and the lines provide a complete coverage of the donor genome. This material has already served to add several valuable agronomic traits to the genetic background available for breeding programs with different objectives (Fridman et al, 2000; 2004). man et al, 2000; 2004). et al, 2000; 2004).