OKABE, Yoshihiro; ASAMIZU, Erika; SAITO, Takeshi; MATSUKURA, Chiaki; ARIIZUMI, Tohru; BRES, Cécile; ROTHAN, Christophe; MIZOGUCHI, Tsuyoshi; EZURA, Hiroshi

doi:10.1093/pcp/pcr134

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OKABE, Yoshihiro
Université de Tsukuba = University of Tsukuba

ASAMIZU, Erika
Université de Tsukuba = University of Tsukuba

SAITO, Takeshi
Université de Tsukuba = University of Tsukuba

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Ce document a été publié dans

Plant and Cell Physiology. 2011, vol. 52, n° 11, p. 1994-2005

Oxford University Press (OUP)

Résumé en anglais

To accelerate functional genomic research in tomato, we developed a Micro-Tom TILLING (Targeting Induced Local Lesions In Genomes) platform. DNA pools were constructed from 3,052 ethyl methanesulfonate (EMS) mutant lines treated with 0.5 or 1.0% EMS. The mutation frequency was calculated by screening 10 genes. The 0.5% EMS population had a mild mutation frequency of one mutation per 1,710 kb, whereas the 1.0% EMS population had a frequency of one mutation per 737 kb, a frequency suitable for producing an allelic series of mutations in the target genes. The overall mutation frequency was one mutation per 1,237 kb, which affected an average of three alleles per kilobase screened. To assess whether a Micro-Tom TILLING platform could be used for efficient mutant isolation, six ethylene receptor genes in tomato (SlETR1-SlETR6) were screened. Two allelic mutants of SlETR1 (Sletr1-1 and Sletr1-2) that resulted in reduced ethylene responses were identified, indicating that our Micro-Tom TILLING platform provides a powerful tool for the rapid detection of mutations in an EMS mutant library. This work provides a practical and publicly accessible tool for the study of fruit biology and for obtaining novel genetic material that can be used to improve important agronomic traits in tomato.< Réduire

Mots clés

REVERSE GENETICS

BIOLOGIE DU DEVELOPPEMENT

BIOLOGIE VEGETALE

Mots clés en anglais

ETHYLENE RECEPTOR

FRUIT RIPENING

MICRO-TOM

TILLING

TOMATO