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Interspecific somatic hybrids Solanum bulbocastanum (+) S. tuberosum H-8105

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Abstract

Interspecific somatic hybrids between a dihaploid potato clone H-8105 susceptible to Phytophthora infestans (Mont.) de Bary and a resistant diploid tuberizing species Solanum bulbocastanum were generated and analysed. Only ten regenerants displaying the intermediate morphology with dominating characteristics of the wild parent (simple leaves, anthocyanin pigmentation) were produced in 15 weeks after a single PEG-mediated fusion event. The RAPD patterns confirmed the hybridity of all of them. The hybrids rooted poorly and grew slowly in vitro. The cytological analysis revealed a high degree of aneuploidy in the hybrids with morphological and growth anomalies in vitro, while the morphologically normal hybrids were tetraploids. All the S. bulbocastanum (+) H-8105 hybrids were unstable in culture and three of them were consequently lost during three years of propagation in vitro. The possible reasons for instability of somatic hybrids between the distantly related species are discussed.

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Szczerbakowa, A., Bołtowicz, D. & Wielgat, B. Interspecific somatic hybrids Solanum bulbocastanum (+) S. tuberosum H-8105. Acta Physiol Plant 25, 365–373 (2003). https://doi.org/10.1007/s11738-003-0018-z

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  • DOI: https://doi.org/10.1007/s11738-003-0018-z

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