Citrus, Pistachio Researchers Named First UC Endowed Chairs

Two University of California (UC) Agriculture and Natural Resources scientists are the first endowed chairs in UC Cooperative Extension (UCCE).

Craig Kallsen
Craig Kallsen

The UCCE citrus and pistachio crops advisor in Kern County, Craig Kallsen, is the UC Cooperative Extension Presidential Chair for Tree Nut Genetics, and UCCE integrated orchard management specialist Bruce Lampinen, based at UC Davis, is the UC Cooperative Extension Presidential Chair for Tree Nut Soil Science and Plant Water Relations. The endowed chairs will give the two scientists a dedicated source of funding for five years, when the chairs are reopened for review.

University of California  Agriculture and Natural Resources (UC ANR) established the two $1 million endowments for the endowed chairs last year. Half the funding was provided by UC President Janet Napolitano; the other half was donated by the California Pistachio Research Board. Establishment of the endowed chairs was announced last year by UC ANR vice president Glenda Humiston.

Bruce Lampinen
Bruce Lampinen

“I’m pleased that we have identified two exceptional research programs to support with the first endowed chairs in the more than 100-year history of UC Cooperative Extension,” Humiston said. “I feel certain Craig and Bruce will make significant advances in pistachio production systems under California conditions.”

Bolstering The Pistachio Breeding Program

Kallsen said the endowment comes at a particularly opportune time for the UC pistachio breeding research program. In cooperation with UC Davis pomology researcher Dan Parfitt, Kallsen has been breeding pistachios as part of a variety selection program using conventional methods – manually crossing and then growing trees to determine whether they have beneficial characteristics.

“Breeding new varieties this way takes a while, especially in pistachios,” Kallsen said. “They don’t bloom for four or five years. With some trials we are just now at the stage where it gets interesting. The funding will be helpful for evaluating the new progeny.”

Kallsen is looking for pistachio varieties that show novel nut, tree growth, and yield characteristics, and for varieties that produce a high yield even under low-chill conditions.

“The climate appears to be warming,” Kallsen said. “That poses a problem for pistachios, because our current cultivars have a significant chilling requirement that has not always been met when we don’t have cold, foggy winters.”

Kallsen plans to establish a trial pistachio orchard at the UC Riverside Coachella Valley Agricultural Research Station, where winter weather rarely dips to sufficient chill levels, to see which varieties produce acceptable crops under the warmer conditions.

Another key objective of the UC breeding program is identifying pistachio cultivars that mature at different times. At the moment, 90% of California pistachios are the ‘Kerman’ variety. They all mature at the same time, putting pressure on harvesting, transportation, processing, and storage resources.

“Ten years ago, UC introduced the ‘Golden Hills’ variety, which matures about two weeks earlier. It now represents 5% or 10% of the state’s crop,” Kallsen said. “We’re looking closely at another potential cultivar that matures 10 days before ‘Golden Hills.’”

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3 comments on “Citrus, Pistachio Researchers Named First UC Endowed Chairs

  1. My name is Mark Hensley, and I Own The New Freedom Pistachio Farm in Hinkley California. I am a retired railroader and would like to learn more about Pistachio Farming, watering, fertilizer and pesticide use. Where can I go for help ?

  2. I trimmed 40 of My Kerman Pistachio trees too much and they are barely producing nuts after two seasons! The also grew excessive shooters and are worse than if I had just pruned the worst offenders… Doh !!!

  3. I own a Pistachio Farm in Hinkley California… I am a retired railroad engineer, Not a Farmer… I would like to know where I can learn to Farm successfully… The school of hard knocks is a Poor Institution ! Can anyone help Me ? Mark Hensley

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