Sunday, November 23, 2014
YOLO COUNTY NEWS
99 CENTS

Gene discovery may halt pepper disease

By
From page A7 | May 23, 2014 |

For more than a century, the global hot pepper industry has been dealing with a problem. A funguslike pathogen, known as Phytophthora capsici, has spread a root rot disease that severely diminishes crop yields.

Despite highly adaptive management practices and the availability of wild pepper varieties that have evolved resistance, the pathogen continues to thrive.

Now, UC Davis scientists have identified a promising candidate gene that encodes resistance to P. capsici in peppers. The work is published this month in the journal The Plant Genome.

Under the direction of plant scientist Allen Van Deynze, the director of research at UCD’s Seed Biotechnology Center, doctoral candidate Zeb Rehrig had begun the project by screening 31,000 genes in a population of pathogen-resistant chili peppers and jalapeños — a number far surpassing the standard 1,000 genes screened in this type of test.

This allowed the researchers to build a high-density genetic map of 3,600 genes.

They then tested their findings by introducing the peppers to P. capsici samples collected from across Mexico, New Mexico, New Jersey, California, Michigan and Tennessee. Analyses incorporating the pepper genome, from a study Van Deynze recently co-authored, ultimately led them to the P5 chromosome and to the gene related to resistance, CaDMR1.

While breeders have long known of a resistant pepper gene in the area of this chromosome, no one has been able to zero in on it the way the UCD team has, Van Deynze said.

“The goal of when you get the gene is of course that you can have the perfect marker,” he explained, “which theoretically should be useful in really any population you test it in.”

The new DNA markers will pave the way for breeders to selectively target the exact gene and turn on the resistance mechanism, giving an industry worth $29.1 billion worldwide a much-needed new tool in the battle over root rot.

“This paper is the first chance to show all the work I’ve been doing these last couple of years,” said Rehrig. “It’s showing things you can apply directly to breeding right away.”

Understanding the mechanism of the resistance in pepper is the next goal for Rehrig and Van Deynze.

Funding for Zeb Rehrig and the project has come from a UC Davis department of plant sciences graduate student research grant and from a U.S. Department of Agriculture Plant Breeding and Education grant.

The USDA grant also allowed Van Deynze to invite, in collaboration with the UC Davis Student Farm program, a total of about 1,500 kindergarten and elementary students to visit and take a look at the broad diversity of peppers the scientists had collected and hopefully to spark their interest plant breeding and plant science.

— UC Davis News

Comments

comments

.

News

Hollywood readies its big guns for the holidays

By Derrick Bang | From Page: A1 | Gallery

 
Need for local foster parents grows

By Anne Ternus-Bellamy | From Page: A1

 
Tactical robot decreases officer risks

By Lauren Keene | From Page: A1 | Gallery

Couple arrested on drug, firearm possession charges

By Lauren Keene | From Page: A2

 
Woman confronts suspicious follower

By Lauren Keene | From Page: A2

Bob Dunning: Signs, signs, everywhere a sign

By Bob Dunning | From Page: A2

 
For the record

By Enterprise staff | From Page: A2

Berkeley, Santa Cruz students protest fee hikes

By The Associated Press | From Page: A2

 
Auction-bound student artwork stolen in downtown heist

By Lauren Keene | From Page: A3, 1 Comment | Gallery

UCD awarded $100M to lead program to predict, prevent pandemic threats

By Special to The Enterprise | From Page: A3

 
Breakfast with Santa tickets are going fast

By Enterprise staff | From Page: A3

 
Free boot camp, yoga fundraiser this week

By Enterprise staff | From Page: A4

Enterprise observes holiday hours

By Enterprise staff | From Page: A4

 
Bell-ringers still needed this holiday season

By Enterprise staff | From Page: A4

Thanksgiving feast is open to all

By Enterprise staff | From Page: A4

 
Give blood and get a free movie ticket

By Enterprise staff | From Page: A4

Workshop will answer financial aid questions

By Enterprise staff | From Page: A4

 
Probationers, parolees graduate from Yolo transitional program

By Special to The Enterprise | From Page: A4 | Gallery

Round up at the registers for Davis schools

By Enterprise staff | From Page: A5

 
Museum announces holiday schedule

By Enterprise staff | From Page: A5

Yolo Food Bank invites locals to run with the flock

By Enterprise staff | From Page: A5

 
At the Pond: Stop, look and listen

By Jean Jackman | From Page: A5 | Gallery

Project Linus seeks donations

By Enterprise staff | From Page: A6

 
Swing your partner!

By Wayne Tilcock | From Page: A6

Fairfield School enjoys a festive feast

By Special to The Enterprise | From Page: A7 | Gallery

 
Right at home: gifts you can use and use up

By The Associated Press | From Page: A8

Dec. 10 jeans drive benefits STEAC

By Anne Ternus-Bellamy | From Page: A9

 
Davis Community Church history recounted in Sunday talk

By Enterprise staff | From Page: A10 | Gallery

Open your heart

By Enterprise staff | From Page: A11

 
Bob Hope interview pulled from ‘the vault’

By Enterprise staff | From Page: A12

.

Forum

There’s only one way to fix this

By Creators Syndicate | From Page: B5

 
Students barking up the wrong tree

By Our View | From Page: A14

Heartbroken over treatment of teacher

By Letters to the Editor | From Page: A14

 
Rick McKee cartoon

By Debbie Davis | From Page: A14

Google, tell me. Is my son a genius?

By Special to The Enterprise | From Page: A14

 
Daryl Cagle cartoon

By Debbie Davis | From Page: A15

Cordial political discourse: Seven years later, the thoughts resonate

By Special to The Enterprise | From Page: A15

 
Easing the stress during college application season

By Special to The Enterprise | From Page: A15

How I want to be remembered

By Marion Franck | From Page: A16

 
Watch out for holiday weight gain

By Special to The Enterprise | From Page: A16

 
.

Sports

Aggie men finish off Furman

By Enterprise staff | From Page: B1

 
Upset-minded Lions bounce UCD from WWPA tourney

By Enterprise staff | From Page: B1

New, old-look helmets not enough to lift UCD footballers

By Bruce Gallaudet | From Page: B1 | Gallery

 
Late shot sinks Aggie women

By Spencer Ault | From Page: B1 | Gallery

Turnovers costly as UC Davis loses Classic, 41-30

By Bruce Gallaudet | From Page: B1 | Gallery

 
UCD roundup: Seniors play well in Aggie volleyball loss

By Enterprise staff | From Page: B3 | Gallery

Wire briefs: Kings get past depleted T-Wolves

By The Associated Press | From Page: B6

 
With volleyball playoff berth, DHS accomplished its 2014 goal

By Evan Ream | From Page: B6 | Gallery

.

Features

.

Arts

.

Business

 
Don’t pass up the parking gift downtown

By Wendy Weitzel | From Page: A13

Doby Fleeman: Give thanks for our innovation culture

By Doby Fleeman | From Page: A20

 
Honey, spreads showcased at open house

By Enterprise staff | From Page: A20

.

Obituaries

.

Comics

Comics: Sunday, November 23, 2014

By Creator | From Page: B8