Selection of pineapple hybrids via genotypic values (REML/BLUP) for fruit mass and total soluble solids

Abstract

The ranking of hybrids via genotypic values stands out due to its maximum selective accuracy in relation to ordering based on phenotypic values, which incorporate environmental effects, causing changes in the final classification. The aim of this study was to pre-select cloned pineapple hybrids based on genotypic values for higher total soluble solids (TSS) and larger fruit mass without crown (FMWC). It was evaluated with 364 hybrids propagated vegetatively, in a Federer's Augmented Blocks. Genotypic values were estimated by REML/BLUP procedure. High proportion of the phenotypic variance was explained by genotypic effects, due to heritabilities in broad sense of 0.9786 (TSS) and 0.4929 (FMWC). IPA 04-60, IPA 125-363, IPA 125-85, and IPA 04-92 hybrids present FMWC greatest than 2.20 kg. IPA 125-218, IPA 125-95, IPA 125-188, and IPA 125-97 hybrids achieve TSS greatest than 20.0 °Brix. These hybrids exhibit promising traits to proceed a second evaluation cycle via vegetative propagation.

Phenotypic Selection to Avoid Discarding Target Genotypes for Four Fruit Traits Based on Environmental Variances in a Pineapple Cross-seedling Population

“…To overcome this restriction, we used a seedling population from the cross 'Yugafu' × 'Yonekura' that was vegetatively propagated, estimated environmental variances, and determined the selection efficiency in primary selection. Lira et al (2021) reported selection in a pineapple offspring population by estimating genotypic values as accurately as possible with fruit trait evaluations in replications. In contrast, in this study, we investigated primary practical selection with environmental bias without replication and selection efficiency based on the loss of target genotypes by selection.…”