Czech J. Genet. Plant Breed., 2025, 61(2):100-109 | DOI: 10.17221/7/2025-CJGPB

Reciprocal hybridisation of Aloe species (Aloe arborescens with A. vera) and their characterisation in a highland region of VenezuelaOriginal Paper

José Imery-Buiza ORCID..., Wendy Ozols-Narbona
Plant Genetics Laboratory, Department of Biology, Universidad de Oriente, Cumaná, Sucre, Venezuela

Aloe vera and A. arborescens are succulent plants widely used in cosmetics, pharmaceuticals, and food supplements. The objective of this study was to perform interspecific crosses and agronomically characterise three genotypes cultivated in a Venezuelan highland region (altitude 1 727 m, 13–17.9 °C). Successful hybridisation was achieved only when A. arborescens pollen (P1) was used on A. vera pistils (P2), whereas the reciprocal cross was largely unsuccessful. Hybrid seed germination reached 11.86%, and adult hybrids exhibited significant vegetative superiority over P1, particularly in leaf volume, leaf weight, and flower number. The progeny outperformed both parents in leaf base width and lateral tooth size, thereby enhancing its ornamental value. The expected 2n = 2x = 14 karyotype was confirmed in the root meristems of hybrids. The analysis of leaf pulp processing indicated that the hybrid was promising for juice production (39.8% yield, 1 203 ppm acemannan), thus highlighting its potential for agro-industrial applications in tropical highlands or comparable temperate regions. Other agronomic traits, including number, thickness, colour, and shape of leaves; sprouting of stem branches and basal suckers, flowering period, inflorescence, eggs/ovary, and details of the colour and dimensions of bracts, perianth, pedicel, and ovary, were also evaluated.

Keywords: Aloe breeding; chromosomes; hybridisation; morphological markers

Received: January 26, 2025; Revised: March 19, 2025; Accepted: March 24, 2025; Prepublished online: April 4, 2025; Published: April 15, 2025  Show citation

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Imery-Buiza J, Ozols-Narbona W. Reciprocal hybridisation of Aloe species (Aloe arborescens with A. vera) and their characterisation in a highland region of Venezuela. Czech J. Genet. Plant Breed. 2025;61(2):100-109. doi: 10.17221/7/2025-CJGPB.
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