November/December 2022 - 16

NEW VARIETIES
Pyrenees variety.
Photo: Burchell Nursery
Nonpareil, including ripening and a
comparable kernel weight and crack
out. This new cultivar performed highly
across all categories in a 2019 survey
conducted by the Almond Board of
California on 60 varieties from around
the world.
" The adoption of Yorizane will
eliminate the need for beehive rental
and would significantly reduce
production costs, " said Summaira
Riaz, USDA-ARS research geneticist
and breeder. " Self-compatible trees
can be grown in blocks of the same
variety, allowing for more efficiency
at harvest time. "
Walnut
* Wolfskill
Wolfskill is the only new walnut
variety released in the last five
years. Developed at the University
of California (UC), Davis, breeding
program, which also released the
marquee walnut variety Chandler in
the late 1970s, the breeders of Wolfskill
aimed to widen the window of a
traditionally narrow harvest.
" Chandler is what most of the world
produces, but there's a problem here,
which is that Chandler is a pretty late
variety, " said Pat Brown, UC Davis
professor and nut crop breeder. " If
you've got a big industry with lots of
capital investment and processing and
handling, and everybody's just growing
this one variety that harvests at one
time pretty late in the season, it's pretty
inefficient. So, at the breeding program
here at UC Davis, our goal for a long
time has been to widen that window
to deliver varieties that are exclusively
on the early side - to develop earlier
harvesting varieties that maintain
Chandler-level quality. "
Wolfskill physically resembles
Chandler, and in tests it appears that
the new cultivar might be lighter in
color. While Wolfskill's crack out isn't
quite as desirable as Chandler's intact
halves, Brown emphasized that there
is a trade-off between crack out and
kernel yield.
Chandler is a bit underfilled,
with a kernel yield of about 50%,
sometimes less. By contrast,
Wolfskill is about 56% kernel.
16 NOVEMBER/DECEMBER 2022
Avalon variety.
Photo: Patrick Connor,
University of Georgia
Kalos variety.
Photo: Patrick Connor,
University of Georgia
Yorizane variety.
Photo: USDA-ARS
Nonpareil variety.
Photo: USDA-ARS
But earlier harvest means earlier
leafing, which likely means an
increased presence of blight. Wolfskill,
however, seems to be faring well and
continuing to deliver high yields with
standard spraying and management.
Prior to its release, Wolfskill was
tested by growers across the state
of California. While data won't be
available on its regional growing
success for another few years, Brown
said breeders are confident in its
success, stating that Wolfskill fared
even better than Chandler in the trials
for this year.

November/December 2022

Table of Contents for the Digital Edition of November/December 2022

November/December 2022 - 1
November/December 2022 - 2
November/December 2022 - 3
November/December 2022 - 4
November/December 2022 - 5
November/December 2022 - 6
November/December 2022 - 7
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November/December 2022 - 9
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https://www.nxtbook.com/greatamericanmediaservices/NNG/march-april-2024
https://www.nxtbook.com/greatamericanmediaservices/NNG/january-february-2024
https://www.nxtbook.com/greatamericanmediaservices/NNG/november-december-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/september-october-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/july-august-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/may-june-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/march-april-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/january-february-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/november-december-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/september-october-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/july-august-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/may-june-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/march-april-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/january-february-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/winter-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/fall-2021
https://www.nxtbook.com/greatamericanmediaservices/NNG/summer-2021
https://www.nxtbook.com/greatamericanmediaservices/NNG/winter-2021
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