Parthenocarpy and self-incompatibility in Mandarins

Montalt Rafael, Vives María Carmen, Navarro Luis, Ollitrault Patrick, Aleza Pablo. 2021. Parthenocarpy and self-incompatibility in Mandarins. Agronomy (Basel), 11 (10), n.spéc. Advances in Citrus Breeding, Genetics, Physiology and Horticultural Management:2023, 18 p.

https://doi.org/10.3390/agronomy11102023

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Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Citrus reproductive biology is complex. One of its characteristic features is parthenocarpy that enables seedless fruit production. Citrus parthenocarpy and self-incompatibility knowledge is only partial and sometimes discrepant. Increasing such knowledge is relevant for better managing cultivated varieties and improving the selection of parents in breeding strategies to recover seedless varieties such as mandarins. This work develops an efficient protocol to characterize self-incompatibility and different parthenocarpy types based on emasculation, hand self-pollination, and hand cross-pollination. It analyzes fruit setting and seed production coupled with histological pollen performance observations. We analyzed the reproductive behavior of nine mandarin varieties with relevant characteristics as parents for seedless mandarin breeding. 'Clemenules' clementine and 'Moncada' mandarins were strictly self-incompatible with facultative and vegetative parthenocarpy; 'Imperial' mandarin and 'Ellendale' tangor displayed no strict self-incompatibility associated with facultative and vegetative parthenocarpy; 'Fortune' mandarin was self-incompatible with facultative and stimulative parthenocarpy; 'Campeona' and 'Salteñita' mandarins were self-compatible with vegetative parthenocarpy; 'Serafines' satsuma was associated with male sterility together with facultative and vegetative parthenocarpy; and 'Monreal' clementine was self-compatible and nonparthenocarpic. Our protocol can be applied for screening of mandarin germplasm and to characterize new parents. Reproductive behavior knowledge is important for optimizing seedless mandarin breeding programs based on diploidy, triploidy, or induced mutagenesis.

Mots-clés Agrovoc : phytogénétique, parthénocarpie, Citrus, mandarine, Autostérilité, reproduction asexuée, autopollinisation, pollinisation croisée, variété apyrène, émasculation des plantes

Mots-clés libres : Citrus, Seedless, Parthenocarpic ability, Pollination, Fruit setting, Breeding

Classification Agris : F30 - Génétique et amélioration des plantes
F63 - Physiologie végétale - Reproduction

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

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