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The inheritance and expression of sterility in hybrids of dihaploid and cultivated diploid potatoes

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Abstract

When dihaploids of EuropeanSolanum tuberosum are used as female parents in crosses with South American cultivated diploid potatoes (Group Phureja/Stenotomum), various kinds and degrees of male sterility are found in the offspring. The effect of using different dihaploid and cultivated diploid parents on shrivelled microspore sterility of F1 hybrid progenies was studied. Variation in the character was continuous and statistical analyses showed high general combining ability for dihaploid parents but not for cultivated diploids. A significant but non-linear relationship was found between percent of stainable pollen and seed set in crosses with female tester parents, provided that some degree of functional male fertility was present. F1 clones with pollen of normal appearance but with no functional fertility probably represent a hitherto unclassified cytoplasmic male sterility. The results are discussed from the point of view of methods to be adopted in improving potatoes at the diploid level.

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Carroll, C.P. The inheritance and expression of sterility in hybrids of dihaploid and cultivated diploid potatoes. Genetica 45, 149–162 (1975). https://doi.org/10.1007/BF01517192

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  • DOI: https://doi.org/10.1007/BF01517192

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