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United States Department of Agriculture

Agricultural Research Service

Related Topics

Ann M Callahan

Geneticist


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Dr. Ann M. Callahan
Research Geneticist
Ann.Callahan@ars.usda.gov
Phone: (304)725-3451 ext 356
FAX: (304) 728-2340


Room 210
Appalachian Fruit Research Station
2217 Wiltshire Road
Kearneysville, WV 25430-2217


Curriculum Vitae

 
Education and Degrees

1980 Ph.D.  Developmental GeneticsUniversity of Virginia, Regulation of Sexual Development
                     in Volvox carteri, Robert Huskey, Advisor.

1974 A.B. Biology. Indiana University, Bloomington, IN

Experience

1989- Present

Research Geneticist, USDA-ARS, Appalachian Fruit Research Station, Kearneysville, WV 25430.Developing and utilizing molecular tools to improve breeding for fruit traits (Prunus and other temperate perennial fruit).

1984-1988 

Research Associate, Plant Science Department, West Virginia University, Appalachian Fruit Research Station (Kearneysville). Molecular biology of fruit ripening (tomato).

1980-1984

Postdoctoral Fellow, University of Utah (Salt Lake). Bacterial Chemotaxis,-Threonine Serine Receptor (TSR) Sandy Parkinson, Advisor.

Laboratory Personnel 

Dan Bullock
Kelsey Galimba

Callahan Laboratory Publications

Google Scholar: http://scholar.google.com/citations?user=htlQDikAAAAJ&hl=en&oi=sra

Research Gate:  https://www.researchgate.net/profile/Ann_Callahan2

 Current Projects

Text Box: Left-Peach was stained to show stone cells turning red prior to hardening to become a stone.
Right-Plum was stained to show stone cells turning blue depending on how much lignin they produced.

Stone formation in Prunus--How are stones formed in Prunus and is it possible to manipulate gene expression to prevent the stone hardening?

 

AFRS Field Day_WIL6488_WHWe have planted several dText Box: Along with Chris Dardick, demonstrating the process of stone hardening in wild type fruit and the so- called ‘Pitless’ plums that were remnants from Luther Burbank’s breeding program in the early 1900s.ifferent plum trees (Prunus domestica, prune plums) that came from Luther Burbank’s breeding program from 1900, that have almost no stone. We are using these as breeding material to improve as well as experimental material to determine what the mutation is that prevents stone tissue from being formed.

In addition we have identified genes involved in the process and have genetically engineered plum trees to test if by manipulating those genes there is an effect on the stone formation. These could then be targets for selective breeding.