Breeding behavior of yield components and hollow heart in tetraploid-diploid vs. conventionally derived potato hybrids |
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| Authors: | R E Veilleux F I Lauer |
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| Institution: | (1) Department of Horticultural Science and Landscape Architecture, University of Minnesota, 55108 St. Paul, MN, USA;(2) Present address: Dept. of Horticulture, Virginia Polytechnic Institute and State University, 24061 Blacksburg, Virginia, USA |
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| Abstract: | Summary A factorial mating design with six 4x cultivars as stylar parents mated to three groups of pollen parents (4x cultivars, 4x high protein selections, and 2x S. phureja) was used to study breeding behavior of yield, tuber set, marketable yield and hollow heart in potatoes. Mean yield for the 4x-2x hybrids was equivalent to that of their cultivar parents although yield components, tuber set and average tuber size, were greater and less, respectively, than the cultivar parents. High estimates of general combining ability were found in both pollen and stylar parents for yield, tuber set, marketable yield, number of marketable tubers and hollow heart in all three hybrid populations. Specific combining ability estimates were significant only for yield and hollow heart. Frequency of white-fleshed 4x-2x progeny of five heterozygous yellow-fleshed 2x phureja genotypes was used to confirm cytological identification of a first division restitution mechanism operative in the 2x parents. Although three of these phureja genotypes generated high-yielding progeny, two others produced 4x-2x progeny with mean yield similar to that of hybrids among 4x cultivars.Scientific journal series article 11,601 of the Minnesota Agricultural Experiment Station. |
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| Keywords: | Solanum tuberosum Solanum phureja potato unreduced gametes first division restitution 4x-2x hybrids hollow heart yield |
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