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Articles

ANDROGENESIS INDUCTION FROM TOMATO ANTHER CULTURES: CALLUS CHARACTERIZATION

Article number

725_118

Pages

855 – 862

Language

English

Abstract

Obtaining dihaploid homozygous lines through androgenesis induction is a promising alternative to the classical inbreeding and selection programs.
However, this technology is still poorly developed in tomato.
During androgenesis induction from cultured tomato anthers, a callus intermediate phase precedes organogenesis.
Based on their origin, morphology, color, texture, internal architecture and ploidy levels, we classified the different calli observed into three different types.
Type 1 originate from the connective tissue of the anther.
Type 2 burst from the point of insertion of the anther filament.
They may have a gametophytic origin, but never regenerate shoot apical meristems.
Type 3 calli emerge from the line of dehiscence of the anther.
Besides their putative haploid origin, type 3 calli are capable of regenerate shoot apical and root meristems.
We propose a step of type 3 callus selection and enrichment to be included in order to optimize the protocol of dihaploid tomato plant regeneration from anther cultures.

Publication

V International Symposium on In Vitro Culture and Horticultural Breeding

Authors

J.M. Segui-Simarro, F. Nuez

Keywords

Lycopersicon esculentum, androgenesis, dihaploids, in vitro culture

Full text

https://doi.org/10.17660/ActaHortic.2006.725.118

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