Biology and Earth Science Faculty Scholarship

Title

Genetic Analysis of freezing tolerance in blueberry (Vaccinium section Cyanococcus)

Document Type

Article

Publication Date

6-15-1999

Publication Title

Theor Appl Genet

Publisher

Springer-Verlag

Keywords

Cold hardiness · Blueberry · Inheritance · Gene action · Woody perennials

Abstract

An understanding of the genetic control of freezing tolerance (FT) in woody perennials is important for the effective selection and development of plants with a broader climatic adaptation. This study was undertaken to examine the inheritance and gene action of FT in segregating populations of a woody perennial blueberry (Vaccinium, section Cyanococcus). Two backcross populations were derived from interspecific hybrids of the diploid species Vaccinium darrowi and Vaccinium caesariense, which are widely divergent in their FT. The bud FTs of uniformly cold acclimated plants of parental, F1, and two backcross populations were evaluated with a laboratory controlled freeze-thaw regime, followed by a visual assessment of injury. FT (LT50) was defined as the temperature causing 50% of the flower buds to be injured. Data indicate that the two parents were homozygous for genes for low or high FT. Freezing- tolerance values of the parental and F1 populations indicate that freeze-sensitivity is a partially dominant trait. Results from reciprocal crosses revealed that there was no significant maternal influence on freezing tolerance. Parental phenotypes were fully recovered in 40–42 plants of each testcross population, suggesting that FT is determined by relatively few genes. The degree of dominance and an analysis of generation means revealed that FT in blueberry is controlled largely by additive gene effects and, to a lesser degree, by dominance gene effects. Testing of various genetic models indicated that FT inheritance can be adequately explained by a simple additive- dominance model; however, two epistatic models involving additive-additive and dominance-dominance interactions also fit the data.

First Page

690

Last Page

696

Volume

100

Original Citation

Arora, R., Rowland, L. J., Lehmann, J. S., Lim, C. C., Panta, G. R., & Vorsa, N. (2000). Genetic analysis of freezing tolerance in blueberry ( Vaccinium section Cyanococcus ). TAG Theoretical and Applied Genetics, 100(5), 690-696. doi:10.1007/s001220051341

DOI

10.1007/s001220051341

Version

Publisher's Version

Peer Reviewed

1

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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