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The Journal of Heredity 1990:81(5):371-374
© 1990 The American Genetic Association 81:371-374


research-article

Inheritance and Two Medchanisms of 2n Egg Fromation in 2x Potatoes

J. E. Werner, and S. J. Peloquin

From the Departments of Horticulture and Genetics, University of Wisconsin-Madison

Please address reprint requests to Dr. Peloquin at the Department of Genetics, University of Wisconsin, Madison, WI 53706.

Abstract

The genetic control of two mechanisms of 2n egg formation—omission of the second meiotic division and failure of cylokinesis after the second meiotic division—was determined in 2x haploid-wild species hybrids of potato. Crossability data and cytological analysis of progeny obtained from intercrosses among parental clones, intercrosses among their F1 hybrids, crosses to testers, and crosses between testers indicated single-locus contral of each mechanism. Test for allelism indicated the two mutant genes are not allelic. The simple genetic control of 2n egg formation has significant implication in the evolution of polyploids and in the develpment of new breeding methods for potatoes.


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D. Carputo, L. Frusciante, and S. J. Peloquin
The Role of 2n Gametes and Endosperm Balance Number in the Origin and Evolution of Polyploids in the Tuber-Bearing Solanums
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[Abstract] [Full Text] [PDF]



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