Summary
The isoenzymic gene GOT-I was used as an indicator of ploidy levels and hybridity in the progeny of a 4x × 2x (A878/5, GOT-1 abdn × ‘Gloster 69’, GOT-1cc) cross, derived from the apomictic species (Malus hupehensis)which segregated for mildew resistance. The distinction between resistant and susceptible plants was sharp. After 3 months in a greenhouse, resistant plants showed no signs of sporulation. Of the hybrid seedlings (diploid and triploid) 78% were mildew resistant. This analysis was facilitated through the use of the GOT-1c allele, as a marker of hybridity. It appears that the prospects of transferring high mildew resistance from M. hupehensis to the cultivated apple are promising; of the 65 hybrid resistant seedlings 18 were diploid. A similar approach in earlier generations might have facilitated the earlier transfer of this resistance to the cultivated apple.
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References
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© 1994 Springer Science+Business Media Dordrecht
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Batlle, I., Alston, F.H. (1994). Isoenzyme aided selection in the transfer of mildew (Podosphaera leucotricha) resistance from Malus hupehensis to the cultivated apple. In: Schmidt, H., Kellerhals, M. (eds) Progress in Temperate Fruit Breeding. Developments in Plant Breeding, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0467-8_4
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DOI: https://doi.org/10.1007/978-94-011-0467-8_4
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