Saharan Mustard Genetics - Seed Sample locations
Craig Dremann, Box 361, Redwood City, CA 94064 (650) 325-7333 email

Please note: The USDA GRIN program has Brassica tournefortii seed samples in their collection in Iowa, and our California and Southwest desert infestations have a unique seed color the year the seeds are harvested. Freshly harvested seeds from our deserts are brick-red seeds, similar to a population from India that is imported into the USA for use as edible mustard seeds.
However, as the seeds of the Southwestern and California desert populations age over the years, they turn a darker brown colors, and then start to look like some of the populations in the USDA Ames collection.
I have seen the plants growing in Mecca, California, the location of the original North American infestation, and have seeds in the collection from those plants, and their growth habit is very different than the other populations. If the Mecca population had been growing there since the 1920s, it is a weak plant and still confined to around the Mecca area.
I am suspecting that the current infestation is an excape from a Brassica breeding program that uses Saharan mustard to transfer Tournefortii genes to other oilseed Brassicas. Other researchers have suggested planting Saharan mustard for its seeds to be used for biodiesel.
So if this new more agressive invasive genotype was an escape from either a breeding project or a biodiesel trial somewhere in Southern California or Arizona, the most likely source of stock seed could have been the USDA collection at Ames.
As of 2005, here are the suspects based on seed color, from the USDA collection:
MOST LIKELY SUSPECT: Red-brown seeded genotype,
PI 296063 - from Spain, Madrid, seed color most closely matches our infestation.
LIKELY SUSPECTS:
Brown seeded 15 genotypes from France, India, Iowa, Israel, Morocco, Pakistan, and Spain.
LESS LIKELY SUSPECTS:
Five genotypes that are mixed 1/2 white seeded form and 1/2 brown seeded forms from Pakistan. Another genotype that is mixed 1/3 red seeded, 1/3 white seeded and 1/3 brown seeded from Pakistan PI 426416, where the red-seeded may have been separated out?
NOT A SUSPECT: All white seeded genotype from Pakistan PI 426411.



California

Fresno

--No. 18 - I-5 PM 1.00 rest stop, near Kings County line - C. Dremann - 5/05

Kern
--No. 1 - Hwy Cal. 14 - PM 26.7 mi. north of junction of new Cal. 58 - C. Dremann - 5/15/2005
--No. 2 - Hwy Cal. 14 at Jawbone Canyon BLM ORV area - C. Dremann - 5/15/05
--No. 42 - Hwy Cal. 14 - PM 32.50 mi. near Freeman Junction- C. Dremann - 5/15/2005

Imperial
--No. 9 - Cal. 78 PM 28.5, a few miles west of Algodones dunes - C. Dremann - 5/05
--No. 10 - Cal. 98 PM 53 20 miles east of Calexico - C. Dremann - 5/05
--No. 12 - County S-80, 5 miles east of Ocotillo, west of Plaster City - C. Dremann - 5/05
--No. 46 - Junction Cal. 86 & County S-22 near Salton City - C. Dremann - 5/05

Riverside
--No. 7 - US 95 PM 28 at 8 miles south of San Bernardino county line - C. Dremann - 5/05
--No. 8 - US 95 junction I-10, Blythe - C. Dremann - 5/05
--No. 13 - Mecca, the original North American location from 1920s, 66th Avenue, 2 mi. east of town - C.D.- 5/05
--No. 14 - I-10 and junction of Cal. 177 "Desert Center" - C. Dremann - 5/05
--No. 15 - Junction Cal. 62 and Cal. 177 ­ original Mojave desert infestation from 1997 survey - C.D. - 5/05
--No. 27 - Dillon Road outside the southwesternern edge of Joshua Tree NP - JTNP - 5/3/05
--No. 44 - Coachella Valley - National Wildlife Refuge, Washington Av. - C. Dremann -5/05

San Bernardino
--No. 3 - Junction Cal. 58 & Main St., Barstow - C. Dremann - 5/05
--No. 4 - I-40, town of Ludlow - C. Dremann - 5/05
--No. 5 - I-40 at rest stop 5 miles east of Essex - C. Dremann - 5/05
--No. 6 - I-40 in town of Needles, junction Needles Hwy (old US 66) and "O" street - C. Dremann ­ 5/05
--No. 16 - US 95 PM 35.00, 24 miles north Vidal Junction - C. Dremann - 5/05
--No. 17 ­ US 95 north of I-40 PM 71.0 "Great Wall of Mustard" ­ 5-2005
--No. 29 - I-40, town of Ludlow - Marilyn Hanson - 6/29/2005
--No. 30 - Needles, junction US 95 and I-40 - Marilyn Hanson - 6/29/2005

San Mateo
--No. 43 ­ Skyline Blvd. /Cal. Highway 35 PM 80 ­ CD ­ 5-2008


Arizona
Coconino County

--No. 28 - Lees Ferry area - Lori Makarick - 5/2005

La Paz County
--No. 33 - Quartzite at Bealls Outlet parking lot - Marilyn Hanson - 6/29/2005
--No. 34 - Parker in downtown along Ariz. Hwy 95 - Marilyn Hanson - 6/29/2005

Maricopa County
--No. 31 - Gila Bend and I-8, at America's Choice Inn - Marilyn Hanson - 6/29/05
--No. 32 - Buckeye and I-10, roadside irrigation ditch - Marilyn Hanson - 6/29/05

Mohave County
--No. 36 - Hwy 93, 18 miles south of I-40 - Alan McBee - 7/14/05
--No. 37 - US 95 2 miles NE Bullhead City - Alan McBee - 8/11/05
--No. 38 - I-40 between Needles and Kingman - Alan McBee - 8/15/05
--No. 39 - Hwy. 93, between Kingman and Las Vegas - Alan McBee - 8/11/05

Pima County
--No. 23 - Ariz. Route 85 one miles south of Why - Sue Rutman - 5/24/05
--No. 24 - Ariz. Route 86 near Three Points - Sue Rutman - 5/24/05
--No. 35 - Tucson Mountain Park - Marilyn Hanson - 7/11/05

Yuma County
--No. 11 - I-8 PM 67.6, Dateland cloverleaf - C. Dremann - 5/05


Nevada
Clark County
--No. 19 - Junction of I-15 and US 93 - John Hiatt - 5/2005
--No. 20 - I-15 on Mormon Mesa, 3 mi north of Exit 100, Carp-Elgin Rd - John Hiatt - 5/2005
--No. 21 - Las Vegas, Jct. Windmill Lane & Placid St., single plant "A"- John Hiatt - 5/7/05
--No. 22 - Las Vegas, Jct. Windmill Lane & Placid St., single plant "B"- John Hiatt - 5/7/05
--No. 25 - near Lake Mead NRA, Northshore Road PM 7.5 - Dr. Elizabeth Powell - 5/5/05
--No. 40 - I-15 PM 80, Ute exit - C. Dremann - 8/31/05
--No. 41 ­ Cottonwood Cove Road BLM lands 7 miles from US 95 ­ Nicole Sikula 4-27-2005 Lat 3928396 Long 701222.
India
--No. 45 ­ "Mustred [sic] Seeds (Red)" imported for food use by Kumud Imports, Fremont, California, produced by Shree Ranchhodray Masala Mill, Gujarat, India.



Note: No. 26 was removed from the collection because it was mis-identified by the collector.


Part of the Desert Mustards page at http://www.ecoseeds.com/mustards.html
ANY QUESTIONS: call 9AM - 4 PM M-Sat. (650) 325-7333, or email



Updated January 15, 2014