The Open Biotechnology Journal


ISSN: 1874-0707 ― Volume 15, 2021

A Cisgenic Approach in the Transformation of Bread Wheat Cv. Saratovskaya 29 with Class I Chitinase Gene

Elina Maltseva1, Gulnur Iskakova1, Ainur Ismagul2, Alexandr Chirkin1, Dinara Naizabayeva1, Gulnara Ismagulova1, *, Natalya Malakhova1, Nagima Aitkhozhina1, Serik Eliby2, Yuriy Skiba1
1 M.A. Aitkhozhin Institute of Molecular Biology and Biochemistry, 86 Dosmukhamedov St., Almaty, 050012, Kazakhstan
2 Australian Center for Plant Functional Genomics, Hartley Grv, Adelaide, 5064, Australia

Abstract

Background:

Bread wheat is one of the major crops grown worldwide, showing high demand for new varieties with such traits as pathogen resistance. As the public acceptance of transgenic plants remains low, a novel approach – cisgenesis – is being developed to introduce the genes from the same or closely related species.

Objective:

This study presents a cisgenic approach used for transformation of wheat with class I chitinase gene derived from T. aestivum cv. Stepnaya 15, co-transformed with acetohydroxyacid synthase gene that provides tolerance to imidazolinone herbicides.

Methods:

Calli from immature embryos of spring bread wheat Triticum aestivum cv. Saratovskaya 29 were used for co-transformation with two independent minimal expression units (MEUs): class I chitinase and acetohydroxyacidsynthase gene (AHAS). For identification of cisgenic plants, genomic DNA was extracted from the leaves of imazethapyr-resistant regenerant plants at the plantlets stage and screened by polymerase chain reaction. Efficiency of transformation was calculated as the relation of regenerated plants with chitinase gene insert to the total number of calli in the experiment.

Results:

The average transformation efficiency in four series of experiments (total number of calli - 2299) was found to be 1.84% (ranging from 0.3% to 3.4%), while total co-transformation efficiency reached 87.93%.

Conclusion:

The average transformation efficiency in four series of experiments (total number of calli - 2299) was found to be 1.84% (ranging from 0.3% to 3.4%), while total co-transformation efficiency reached 87.93%. The high efficiency of co-transformation in the experiment promotes it as a very useful technique for the production of wheat lines, free of the selectable marker gene. To our knowledge, this is the first report of cisgenic bread wheat, where both target and selectable genes are derived from wheat.

Keywords: Wheat, Cisgenesis, Biolistic transformation, Chitinase gene, Cereal crops, Transgenic.


Article Information


Identifiers and Pagination:

Year: 2021
Volume: 15
Publisher Item Identifier (PII): BMS-TOBIOTJ-2020-28

Article History:

Electronic publication date: 31/3/2021
Collection year: 2021

© 2021 Maltseva et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Correspondence: Address correspondence to this author at M.A. Aitkhozhin Institute of Molecular Biology and Biochemistry, 86 Dosmukhamedov St., Almaty, 050012, Kazakhstan; Tel: +7 777 246 6189; E-mail: i_gulnara@mail.ru


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