ArticleBMC genomics2026
Expression heterosis in the abaca (Musa textilis Née) BC
Article in BMC genomics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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1 citing paper in PubMed.
- High-quality draft genome assembly and functional annotation ofFrontiers in plant science · 2026Article
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3 authors.
Funding
Abstract
backgroundThe Philippines supplies approximately 86% of the global demand for abaca (Musa textilis Née) fiber. To improve its resistance against pathogens, a backcross (BC2) hybrid named Dioscoro 1, was developed by crossing Abuab, an abaca variety with high fiber quality, to Pacol, a wild banana (Musa balbisiana Colla) variety with resistance against bunchy top virus (ABTV).
resultsLeaf samples from the parental lines (Abuab and Pacol) and their BC2 were sequenced using RNA-seq to assess expression heterosis, regulatory differences, and their association. Analysis of expression heterosis showed that a large number of genes exhibited non-additive (dominance and transgressive) mode of inheritance, accounting for 83.2% of the total heterotic genes. Overdominant and high-parent Abuab dominant genes in the BC2 were identified including genes encoding for cellulose synthases. Results indicated that the combined trans and cis + trans (synergistic) regulatory differences largely explain the cumulative effects of evolutionary divergence between the parents and the repeated backcrossing–selection procedures. Genes exhibiting compensatory interaction are significantly enriched under the transgressive mode of inheritance, contributing mostly to the heterotic effect in the backcross under directional selection. Genes belonging to a specific gene action cluster closely in a 3D space, suggesting that modes of expression inheritance follow mathematical patterns. Further statistical analysis reveals that regulatory differences strongly influence expression heterosis. In our concurrent work, the BC2 demonstrated high-parent Abuab dominance on two important phenotypic traits – fiber length and tensile strength.
conclusionHere, the phenotypic and expression heteroses are inherent even in backcrosses owing to the presence of the two alleles in the Dioscoro 1 genome, albeit in uneven proportions (87.5% Abuab- and 12.5% Pacol-specific alleles for BC2). These information provide insights into the genetic mechanisms underlying the heterotic performance of BC2 and offering valuable directions for abaca breeding.
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