Banca de QUALIFICAÇÃO: TIAGO YUKIO INOUE

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: TIAGO YUKIO INOUE
DATA: 06/03/2026
HORA: 09:00
LOCAL: Sala 3 - DBI
TÍTULO:

Origin of wild triploid potatoes (section Petota, Solanum L., Solanaceae) from Uruguay and Brazil

PALAVRAS-CHAVES:

Allotriploid, autotriploid, cpDNA, ribosomal DNA, reticulate evolution

PÁGINAS: 25
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

Tuber-bearing species of Solanum L. section Petota exhibit extensive genetic and cytotypic diversity, yet the origin of natural triploids remains poorly understood. Here, we investigated triploid formation in S. chacoense (2 EBN), S. commersonii (1 EBN), and S. malmeanum (1 EBN), species distributed across Brazil and Uruguay with different Endosperm Balance Number (EBN) values. Integrating plastid, nuclear, genomic, and cytogenetic data, we show that triploids have multiple independent origins, including inter- and intra-EBN allotriploids and autotriploids. Chloroplast data identified S. commersonii and S. malmeanum as frequent maternal parents, while nuclear and cytogenetic evidence revealed interspecific genomic contributions and introgression. These findings demonstrate that partial permeability of EBN-mediated reproductive barriers enables recurrent hybridization and independent triploid formation. Our results reveal that hybridization and EBN dynamics are key drivers of reticulate evolution and genetic diversification in wild potato species.

MEMBROS DA BANCA:
Presidente - GIOVANA AUGUSTA TORRES (Membro)
Interno - ISABELLA DE CAMPOS MORAES - UFLA (Membro)
Externo à Instituição - LUIZ GUSTAVO RODRIGUES SOUZA - UFPE (Membro)
Externo à Instituição - PAOLA GAIERO - URep (Membro)
Interno - VANIA HELENA TECHIO (Suplente)