An improved protocol for efficient transformation and regeneration of Setaria italica

Autor(es)

Santos, C. M. ^[1] ; Romeiro, D. ^[1] ; Silva, J. P. ^[1] ; Basso, M. F. ^[2] ; Molinari, H. B. C. ^[2] ; Centeno, D. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Sao Bernardo Do Campo, SP - Brazil

^[2] Embrapa Agroenergy, Genet & Biotechnol Lab, Brasilia, DF - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Plant Cell Reports; v. 39, n. 4, p. 501-510, APR 2020.
• Citações Web of Science: 0

Resumo

Key message An efficient and improved transformation method for functional genetics studies in S. italica, being a boon for the Setaria scientific community and for crop improvement. Foxtail millet (Setaria italica) is a short life cycle C4 plant, with sequenced genome, and a potential model plant for C4 species. S. italica is also important on a global food security and healthiness context due to its importance in arid and semi-arid areas. However, despite its importance, there are just few transformation protocols directed to this species. The current protocols reached about 5.5-9% of efficiency, which do not make it a valuable model organism. Different types of explants were used in the above mentioned methods, such as immature and mature inflorescence and shoot apex. However, these techniques have many limitations, such as unavailability of explants throughout the year and a crucial, laborious and considerable time-consuming selection. Aiming a simplified and efficient methodology, we adopted dry mature seeds as explants, which are available in abundance, are constant along the year and well responsive to tissue culture, in addition to a differentiated approach that reaches on an average 19.2% transformation efficiency of S. italica. Thus, we propose a protocol that optimizes the transformation efficiency of this cereal crop allowing a high increase on transformation and regeneration rates. Our transformation protocol provides an interesting tool for Setaria community research as well as enables new strategies for breeding enhanced productivity in the species. (AU)

• Processo FAPESP: 12/23838-7 - Alteração no balanço de carbono em gramíneas visando incremento na produção de açúcares
• Beneficiário: Danilo da Cruz Centeno
• Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Apoio a Jovens Pesquisadores
• Processo FAPESP: 18/15576-9 - Metabolismo do carbono em plantas sob diferentes perspectivas: buscando alternativas para aumento de produtividade
• Beneficiário: Danilo da Cruz Centeno
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores - Fase 2