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© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

The instability of in vitro cultures may cause genetic and epigenetic changes in crops called somaclonal variations. Sometimes, these changes produce beneficial effects; for example, they can be used in breeding programs to generate new cultivars with desirable characteristics. In this article, we present a systematic review designed to answer the following question: How does somaclonal variation contribute to plant genetic improvement? Five electronic databases were searched for articles based on pre-established inclusion and exclusion criteria and with a standardized search string. The somaclonal variation technique has been most frequently applied to ornamental plants, with 49 species cited in 48 articles, and to the main agricultural crops, including sugarcane, rice, banana, potato and wheat, in different countries worldwide. In 69 studies, a technique was applied to evaluate the genetic diversity generated between clones, and, in 63 studies, agronomic performance characteristics were evaluated. Other studies are related to resistance to pathogens, ornamental characteristics and resistance to abiotic stresses. The application of the plant growth regulators (PGRs) benzylaminopurine (BAP) and dichlorophenoxyacetic acid (2,4-D) was the most common method for generating somaclones, and randomly amplified polymorphic DNA (RAPD) molecular markers were the most commonly used markers for identification and characterization. Somaclonal variation has been used in genetic improvement programs for the most economically important crops in the world, generating genetic diversity and supporting the launch of new genotypes resistant to diseases, pests and abiotic stresses. However, much remains to be explored, such as the genetic and epigenetic mechanisms from which somaclonal variation is derived.

Details

Title
The Role of Somaclonal Variation in Plant Genetic Improvement: A Systematic Review
Author
Mileide dos Santos Ferreira 1   VIAFID ORCID Logo  ; Anelita de Jesus Rocha 1   VIAFID ORCID Logo  ; Fernanda dos Santos Nascimento 1   VIAFID ORCID Logo  ; Wanderley Diaciso dos Santos Oliveira 1 ; Julianna Matos da Silva Soares 1   VIAFID ORCID Logo  ; Tamyres Amorim Rebouças 2 ; Lucymeire Souza Morais Lino 2   VIAFID ORCID Logo  ; Haddad, Fernando 3   VIAFID ORCID Logo  ; Claudia Fortes Ferreira 3   VIAFID ORCID Logo  ; Janay Almeida dos Santos-Serejo 3   VIAFID ORCID Logo  ; Jorge Sandoval Fernández 4 ; Edson Perito Amorim 5   VIAFID ORCID Logo 

 Department of Biology, State University of Feira de Santana, Feira de Santana 44036-900, BA, Brazil 
 Department of Biology, Embrapa Mandioca e Fruticultura, Cruz das Almas 44380-000, BA, Brazil 
 Department of Plant Genetic Improvement, Embrapa Cassava and Fruit Growing, Cruz das Almas 44380-000, BA, Brazil 
 Department of Agriculture, University of Costa Rica, San José 11501-2060, San Pedro, Costa Rica 
 Department of Plant Genetic Improvement, Embrapa Mandioca e Fruticultura, Cruz das Almas 44380-000, BA, Brazil 
First page
730
Publication year
2023
Publication date
2023
Publisher
MDPI AG
e-ISSN
20734395
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2791561146
Copyright
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.