Autoria: CARVALHO, H. F.; SILVA, F. L. da; RESENDE, M. D. V. de; BHERING, L. L.

Resumo: Selection of hybrid coffee plants coming from crosses between divergent populations is particularly relevant for the success of breeding programs. This study aimed to outline the best selection strategy in a hybrid population of Coffea canephora var. kouilou and robusta by estimating intrapopulation genetic parameters. Twenty full-sib progenies obtained by North Caroline II were installed in a randomized complete blocks design, with one plant per elementary plot. The following traits were evaluated: vegetative vigor, reaction to rust, plant height, diameter of canopy projection, maturity time, and bean yield. Significant individual genotypic variance and heritability estimates lead to an effective selection. The multi-trait selection index carried out between progenies and at individual level provided 5% and 40% gain, respectively. Thus, intrapopulation selection in a hybrid population is a viable strategy for the selection of superior individuals to compose new crosses and clones for cultivars in the breeding program of C. canephora, even with unbalanced data.

Ano de publicação: 2019

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Florestas

Palavras-chave: Café, Coffea Canephora, Intrapopulation selection, Mixed models, Multi-trait index