Jansky, Shelley .
Effect of pollinator on haploid induction in potato.
THE wild germplasm resources of potato are rich in genetic diversity and are readily available through the U.S. Potato Genebank. While the cultivated potato is tetraploid (2n=4x), most wild Solanum species are diploid (2n=2x). However, valuable genes from many of these species can be readily introgressed into haploids (2n=2x) of the cultivated potato. Parthenogenetic haploids can be produced through crosses to specific diploid pollinators. Several pollinators have been identified in S. tuberosum Phureja Group. All contain an embryo spot marker to distinguish between haploids and hybrids. Crosses were made between tetraploid potato clones and six haploid-inducing pollinators. The pollinators varied in their ability to extract haploids, as indicated by differences in the number of haploids produced per pollination. In addition, the proportion of hybrid versus haploid offspring varied among pollinators. The characterization of differences among pollinators will help to both improve breeding efficiency and elucidate the mechanism(s) by which haploids are generated.
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1 - USDA/UW-Madison, Horticulture, 1575 Linden Dr., Madison, Wisconsin, 53706, USA
Presentation Type: Poster:Posters for Sections
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM