Lentz EM, Eisner S, McCallum EJ, Schlegel K, Campos FDADP, Gruissem W, Vanderschuren H. Genetic Transformation of Recalcitrant Cassava by Embryo Selection and Increased Hormone Levels.
Methods Protoc 2018;
1:E42. [PMID:
31164582 PMCID:
PMC6481083 DOI:
10.3390/mps1040042]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/30/2018] [Accepted: 10/30/2018] [Indexed: 11/17/2022] Open
Abstract
Genetic engineering is considered to be an important tool for the improvement of cassava. Cassava is a highly heterozygous crop species for which conventional breeding is a lengthy and tedious process. Robust transformation is based on Agrobacterium-mediated transformation of friable embryogenic callus (FEC). Production of FEC is genotype-dependent and considered to be a major bottleneck for the genetic transformation of cassava. As a consequence, routine genetic transformation has only been established for a handful of cassava cultivars. Therefore, development of procedures enabling efficient production of high-quality cassava FEC is required to allow the translation of research from the model cultivar to farmer-preferred cassava cultivars. Here we study the FEC production capacity of Brazilian cassava cultivars and report the modification of the protocol for the genetic transformation of Verdinha (BRS 222), a recalcitrant cultivar with high potential for protein production that is extensively used by farmers in Brazil.
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