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Theoretical and Applied Genetics

, Volume 85, Issue 1, pp 55–60 | Cite as

Occurrence of unreduced pollen in diploid blueberry species, Vaccinium sect. Cyanococcus

  • R. Ortiz
  • N. Vorsa
  • L. P. Bruederle
  • T. Laverty
Article

Summary

A total of 1475 individuals belonging to 43 natural populations of seven diploid (2x) blueberry species (Vaccinium section Cyanococcus) and two natural interspecific 2x hybrid populations were evaluated for unreduced pollen production. Significant differences were found in the frequency of unreduced pollen producers between species and within and between populations of the same species. Individuals with 1% or more unreduced pollen were considered unreduced pollen producers. The average frequency of unreduced pollen producers in these diploid species was 13.5%, ranging from 7.4% (V. corymbosum) to 18.4% (V. darrowii). The frequency of unreduced pollen grains in individual clones varied from <-1% to 28.6%. The production of unreduced pollen was not associated with male fertility. The widespread occurrence of unreduced pollen in the diploid species should allow the introgression of this germ plasm to the tetraploid level via unilateral sexual polyploidization.

Key words

Blueberry Unreduced gametes 2n gametes First division restitution Sexual polyploidization 

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • R. Ortiz
    • 1
  • N. Vorsa
    • 1
  • L. P. Bruederle
    • 1
  • T. Laverty
    • 1
  1. 1.Blueberry and Cranberry Research Center, Rutgers UniversityChatsworthUSA

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