Use of unreduced gametes of diploid potato (Solanum tuberosum L.) for true potato seed [TPS] production through 4x-2x crosses

D. Qu

Research output: Thesisinternal PhD, WU

Abstract

The thesis describes the genetic bases of 2n-pollen formation. A comparison was made of the frequencies of 2n-pollen production in a different environment using the progeny of diallel crosses between five well-known diploid clones and three clones of <em>Solanum phureja.</em> It was evident that this character has a complex type of inheritance; through repeated cycles of selection for 2n-pollen a four-fold increase could be achieved at population level. Through proper selection of diploid male parents it was established that 2n-pollen genotypes can be effective for transferring useful characters, like bacterial wilt resistance, in 4x-2x crosses. The progenies derived from 4x-2x, 4x-4x and 4x-selfings were compared to find the optimal breeding approach for the production of TPS varieties. There were clear indications that it was possible to breed TPS varieties directly by 4x-2x crosses. This means that the advantages of breeding at diploid level and the effective transfer of desirable Units by 2n-gametes can be used in the TPS breeding.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
Supervisors/Advisors
  • Jacobsen, Evert, Promotor
  • Ramanna, M.S., Co-promotor, External person
  • Dewei, Z., Co-promotor, External person
Award date12 Feb 1996
Place of PublicationS.l.
Publisher
Print ISBNs9789054854838
Publication statusPublished - 1996

Keywords

  • solanum tuberosum
  • potatoes
  • seeds
  • seed testing
  • spores
  • propagation
  • crops
  • species

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