Heritable site-specific mutagenesis using TALENs in maize

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2015-02-01
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Char, Si Nian
Unger-Wallace, Erica
Frame, Bronwyn
Briggs, Sarah
Main, Marcy
Spalding, Martin
Vollbrecht, Erik
Wang, Kan
Yang, Bing
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Spalding, Martin
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AgronomyGenetics, Development and Cell Biology
Abstract

Transcription activator-like effector nuclease (TALEN) technology has been utilized widely for targeted gene mutagenesis, especially for gene inactivation, in many organisms, including agriculturally important plants such as rice, wheat, tomato and barley. This report describes application of this technology to generate heritable genome modifications in maize. TALENs were employed to generate stable, heritable mutations at the maize g lossy2 ( gl2 ) locus. Transgenic lines containing mono- or di-allelic mutations were obtained from the maize genotype Hi-II at a frequency of about 10% (nine mutated events in 91 transgenic events). In addition, three of the novel alleles were tested for function in progeny seedlings, where they were able to confer the glossy phenotype. In a majority of the events, the integrated TALEN T-DNA segregated independently from the new loss of function alleles, producing mutated null-segregant progeny in T1 generation. Our results demonstrate that TALENs are an effective tool for genome mutagenesis in maize, empowering the discovery of gene function and the development of trait improvement.

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This article is published as Char, Si Nian, Erica Unger‐Wallace, Bronwyn Frame, Sarah A. Briggs, Marcy Main, Martin H. Spalding, Erik Vollbrecht, Kan Wang, and Bing Yang. "Heritable site‐specific mutagenesis using TALENs in maize." Plant biotechnology journal 13, no. 7 (2015): 1002-1010. 10.1111/pbi.12344

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Thu Jan 01 00:00:00 UTC 2015
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