Abstract
Haploids (tetraploids and triploids) were obtained from crosses between colchicine-doubled octaploid and natural hexaploid Mexican potato species and the Gp. Phureja clone 1.22 as the pollinator, but none were obtained from crosses of natural 4x(2EBN) Mexican species with 2x(1EBN) pollinators. The manipulation of ploidy and Endosperm Balance Number (EBN) of tetraploid Mexican potato species was useful in explaining the occurrence of pseudogamous parthenogenetic haploid production. The pollinator effect, EBN, and maternal influence are important characters to consider in searching for haploid-inducing pollinators among 2x(2EBN) as well as 2x(1EBN) potato species.
Compendio
Se obtuvieron haploides (tetraploides y triploides) de cruzamientos entre octoploides doblados con colchicina y especies hexaploides naturales de papa mexicana y el clone 1.22 del Gp. Phureja como polinizador, pero no se obtuvo ninguno de cruzamientos de especies mexicanas naturales 4x (2EBN) con polinizadores 2x(1EBN). La manipulación de la ploidia y del Numero de Balance del Endosperma (EBN) de especies tetraploides de papa mexicana fue útil para explicar la producción de haploides partenogenéticos pseudogamos. El efecto del polinizador, EBN, y la influencia materna son características importantes a considerar en la búsqueda de polinizadores inductores de haploides entre especies de papa 2x(2EBN) así como entre las especies 2x(1EBN).
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Cooperative investigation of Vegetable Crops Research Unit, USDA, Agricultural Research Service and the Wisconsin Experiment Station. Supported in part by USDA/Cooperative States Research Service Competitive Grant No. 83-CRCR-1-1253.
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Singsit, C., Hanneman, R.E. Haploid induction in Mexican polyploid species and colchicine-doubled derivatives. American Potato Journal 68, 551–556 (1991). https://doi.org/10.1007/BF02853772
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DOI: https://doi.org/10.1007/BF02853772