Data/hora: 09/06/2024 12:50:10

Provedor de dados: | 74
País: | Brazil
Título: | Interspecific hybridization and inbreeding effect in seed from a Eucalyptus grandis x E. urophylla clonal orchard in Brazil
Autores: | Campinhos,Eduardo N.; Peters-Robinson,Ingrid; Bertolucci,Fernando L.; Alfenas,Acelino C.
Data: | 1998-09-01
Ano: | 1998
Resumo: | We used allozyme markers to estimate the amount of natural hybridization between Eucalyptus grandis and E. urophylla in a 7.4-hectare commercial hybrid-seed orchard planted in Espírito Santo, Brazil. This orchard was planted in 1982 using a honeycomb design, with each hexagonal plot containing one E. grandis tree surrounded by six E. urophylla trees. There were 267 replicated hexagonal plots in the orchard. Seeds were harvested from the E. grandis clone only. The multilocus outcrossing rate estimated for the E. grandis clone averaged 70.2%, ranging from 33.0 to 99.0% among individual trees. Contaminant pollination, inferred from progeny genotypes containing alleles not present in the seven parental clones, accounted for 14.4% of the hybrid seed. Contaminant pollen was attributed to neighboring eucalyptus stands isolated from the orchard by a 400-m wide belt of native forest. Inbred and hybrid progenies were identified by their allozyme genotypes and transplanted to the field. Field growth of inbred progeny was 30% lower than that of hybrid plants at two and three years of age.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000300014
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47571998000300014
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.21 n.3 1998
Fonte: | info:eu-repo/semantics/openAccess