“American Vineyard” article on table grape breeding

Two table grape clusters- on the left berries are green or pale pink, on the right berries are deep red

Tim Martinson, Craig Ledbetter and Rachel Naegele wrote an article for “American Vineyard” magazine about how VitisGen2 is using marker assisted selection to breed new table grape varieties with deeper coloration. You can read the full article!

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Lu Yin, PhD candidate at UMinn, featured in new Staff Spotlight

Lu Yin headshotLu Yin is a PhD candidate and research assistant at the University of Minnesota, working in Dr Matthew Clark’s lab to breed grapes that are more resistant to the insect pest foliar phylloxera. She answered our questions about her advice to someone just beginning their career (“Don’t be afraid to ask or speak!”), her research project (she grows over 1000 grape seedlings to find the best ones), and how listen to piano music and hymns helps keep her focused and engaged.

You can read more about Lu Yin, and view our previous staff spotlights!

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New Technology for Next-gen DNA Sequencing Validated by the VitisGen2 Project

Illumina DNA processing cell, which looks similar to a computer chip, being held up for the camera.A new technology called rhAmpSeq™ is allowing grape
geneticists and breeders to rapidly find and validate 2000 markers in diverse grape varieties and species.  These ‘core genome markers’ provide a new set of mileposts that were used during a pilot study by the USDA-funded VitisGen2 project to map traits in six unrelated ‘mapping populations’ representing the diversity of U.S. grape breeding programs, including numerous Vitis species.

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Staff spotlight on Janet van Zoeren

Janet van Zoeren joined the VitisGen2 extension and outreach team a few months ago, when she started as viticulture extension support specialist at Cornell University. Her role with the project involves updating the website, writing articles about project developments and publications, and generally focusing on presenting the work of the VitisGen team to a broader audience.

We asked her to talk about her background, role with VitisGen2, what excites her about the project, and how she would describe her job to a kindergardener. Read the full article at: http://blogs.cornell.edu/vitisgen2/team-members/janet-van-zoeren.

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“The Phenotyping Bottleneck” – new Wines and Vines article

Images of grape leaves inoculated with powdery mildew. Resistant cultivar is compared to a susceptible cultivar. It is difficult to tell the difference visually, but easy using computer vision.

Comparing grape cultivars susceptible (left) vs resistant (right) to powdery mildew, with human microscope imaging above vs. using computer vision below.

A new article by Tim Martinson and Lance Cadle-Davidson was published in the December issue of Wines and Vines.

The full pdf of the article is available at “The Phenotyping Bottleneck: How grape breeders link desired traits to DNA markers“.

 

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Staff spotlight on Surya Sapkota

Surya Sapkota and David Gadoury watching like phenotyping robot Blackbird images grape leaf disks.Surya Sapkota, post-doctoral researcher at Cornell University and long-time member of the VitisGen projects, works with preparing, inoculating, and processing grape leaf tissue samples for powdery mildew resistance assessments.

We asked him some questions about his background (he learned about growing crops at a young age from his parent), his role with VitisGen2 (“I work closely with experts in robotics, machine vision, optics, microscopy, and image analysis to facilitate high-throughput phenotyping”), and what he looks forward to when he gets home (his seven month old son).

Read the full article at: http://blogs.cornell.edu/vitisgen2/staff-spotlight-surya-sapkota!

 

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Alumni Update – It’s a Boy!

Shanshan Yang, a former postdoc on the VitisGen1 genetics team, is proud to announce the birth of her baby boy, Ryan, on June 5th!  Shanshan is currently the Bioinformatics Core Manager at the Biodesign Institute of Arizona State University.  Congratulations, Shanshan!

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Why the World’s Most Popular Wine Grapes Are Vulnerable to a Pandemic

An article by Jen Pinkowski in Mental Floss discusses the lack of genetic diversity in the most commonly cultivated V. vinifera grapes.

“The vast majority of wine produced across the world derives from a single grapevine species: Vitis vinifera. The domesticated grape has thousands of varieties, and quite a lot of genetic diversity among them, according to a 2010 paper in PNAS that analyzed genome-wide genetic variation of more than 1000 samples of V. vinifera subsp. vinifera and its wild relative, V. vinifera subsp. sylvestris. But that’s not true for all grapes: Nearly 75 percent of cultivars had a first-degree relationship to at least one other. They were either parents or children.”

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The Quest to Grow the First Great American Wine Grape

An article by Kevin Begos in the Smithsonian Magazine features the VitisGen2 project.

VitisGen is a project that aims to do for wine what the Human Genome Project did for humans. That is: use the vast power and rapidly declining cost of DNA research to pinpoint the precise chromosomal locations in American grapes that drive flavors, aromas, grape size and other important attributes.”

Grape breeding PhD student Laise Moreira collects flower tissue for analyzing sex trait in grapevine as part of the VitisGen2 project at the University of Minnesota Horticultural Research Center in Excelsior, MN. (Matthew Clark / VitisGen)

 

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Molecular Changes in Vitis vinifera Associated with the Onset of Pierce’s Disease

A new publication out of UC Davis, co-authored by VitisGen2 genetics team member, Dario Cantu, investigated molecular changes in vines infected by Pierce’s disease.  The bacterial disease is of major concern because it is vectored by a ubiquitous insect, the glassy winged sharpshooter, and it kills vines within 3-5 years by attacking the xylem.  The study outlined a list of molecular markers for further investigation and possible use in breeding programs.

Symptoms of Pierce’s disease on a grapevine leaf. (Jack Kelly Clark / UC ANR)

 

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