Potential Fertility Levels in Four Diploid Vaccinium Species1

in Journal of the American Society for Horticultural Science
Authors:
J. R. BallingtonDepartment of Horticulture, North Carolina State University, Raleigh, NC 27607

Search for other papers by J. R. Ballington in
ASHS
Google Scholar
PubMed
Close
and
G. J. GallettaDepartment of Horticulture, North Carolina State University, Raleigh, NC 27607

Search for other papers by G. J. Galletta in
ASHS
Google Scholar
PubMed
Close

Abstract

As a first step in determining the phylogeny of the rabbiteye blueberry (Vaccinium ashei Reade), the potential fertility levels among its purported diploid ancestral species. Vaccinium atrococcum (Gray) Heller, Vaccinium caesariense MacKenzie, Vaccinium darrowi Camp, and Vaccinium tenellum Ait., were determined. Differences existed among species in female fertility as determined by total number of seeds and number of potentially viable seeds. The number of seeds per berry was lower than that reported for highbush and rabbiteye blueberry cultivars. No differences were found among species in potential male fertility as indicated by percent stainable pollen. Pollen diameter was not a good criterion for distinguishing species or ploidy levels. Comparison of fertility of diploid species with that of purported polyploid derivatives is suggested as a possible aid in determining phylogeny in Vaccinium. Unreduced pollen grains were detected in only 2 of the 4 species in this study. The average return from heterploid (4n × 2n) crosses was 3 seedlings per 1000 pollinations.

Contributor Notes

Received for publication December 4, 1975. Paper No. 4848 of the Journal Series of the North Carolina Agricultural Experiment Station, Raleigh, N.C. Part of a thesis submitted in partial fulfillment of the Doctor of Philosophy degree, Department of Horticultural Science.

Assistant Professor and Professor, respectively.

Phenotypically almost all highbush blueberry cultivars fall within Camp's (3) circumscription of V. australe, although, for convenience, since most of the cultivars have several species in their ancestry, they are often referred to as V. corymbosum L.

  • Collapse
  • Expand

 

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 32 32 9
PDF Downloads 22 22 8