EUCALYPTUS BREEDING PROGRAMS: A PROPOSAL FOR THE USE OF INBRED PROGENIES

• Autor(a) principal: Antonio Patto Ramalho, Magno
• Data de Publicação: 2022
• Outros Autores: Guimarães Santos, Heloisa, Da Silva Souza, Thaise
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Cerne (Online)
• Texto Completo: https://cerne.ufla.br/site/index.php/CERNE/article/view/3049
• topic: perennial plant breeding, quantitative genetics, heterosis, inbreeding depression, recurrent selection.; English

Background: This review aims to discuss alternatives for obtaining new clones of eucalyptus (Eucalyptusspp.) with greater efficiency than current methods, as well as the feasibility of obtaining hybrid seeds.The commercial-scale use of eucalyptus hybrid seeds may reduce implantation costs and bring otheradvantages for forest exploitation. The proposal focuses on using inbred progenies (S1, S2...Sg) to improvethe species. Self-fertilization releases a greater proportion of undesirable alleles hidden in heterozygotes,increasing selection success. Results: From the best individuals of the inbred progenies, full-sibs (FS) progenies will be developed,allowing the selection of new clones and conduct recurrent selection programs. The hybrid seeds mustbe obtained, also from the FS evaluations, in each selfing generation (Sg x Sg). Simultaneously withthe conduction of inbreeding generations, information must be gathered aiming to implement thestrategy for obtaining hybrid seeds, such as verifying the feasibility of generating double haploid linesand looking for alternatives to facilitate the large-scale production of hybrid seeds. Conclusion: This review of research results can serve as an initial basis for obtaining new clones ofeucalyptus with greater efficiency than current methods, as well as the feasibility of obtaining hybridseeds.