Back to Varieties

CALIFORNIA COOPERATIVE RICE RESEARCH FOUNDATION, INC.

RICE EXPERIMENT STATION

BIGGS, CALIFORNIA 95917-0306

CALIFORNIA AGRICULTURAL EXPERIMENT STATION

UNIVERSITY OF CALIFORNIA

OAKLAND, CALIFORNIA 94612

and

UNITED STATES DEPARTMENT OF AGRICULTURE

AGRICULTURAL RESEARCH SERVICE

WASHINGTON, DC20250

NOTICE OF NAMING AND RELEASE OF

RICE CULTIVAR ‘M-208’

The California Cooperative Rice Research Foundation, Inc. (CCRRF), the CaliforniaAgricultural Experiment Station (CAES), and the United States Department of Agriculture, Agricultural Research Service (USDA-ARS), announce the naming and release of a new rice cultivar M-208.

M-208 is an early, glabrous, high yielding semidwarf, Calrose quality medium-grain (CRMG) rice with blast (Pyricularia grisea) resistance (Pi-z gene) to the California race IG-1. Itis an early selection from the Rice Experiment Station (RES) 1998 cross R23324 and has the pedigree ‘M-401’/3/‘Mercury’//Mercury/‘Koshihikari’/4/‘M-204’. Themale parent was a breeding line found to be resistant to IG-1, selected from RES cross R19610 made in 1994. M-401, developed at RES, is a late maturing premium quality medium-grain currently grown inCalifornia. The male parent of cross R19610 was later released as the medium grain cultivar ‘Lafitte’ (PI593690) by Louisiana State University Ag Center’s Rice Research Station and wasthe source of the Pi-z blast resistance. M-204, also developed at RES, is an early CRMG still in production in California. M-208 is the product of modified pedigree breeding utilizing the Hawaii winter and RES nurseries for generation advance and purification. M-208 has been testedin the University of California Cooperative Extension (UCCE) Statewide Yield Tests 2003 through 2005 under the experimental designation 02-Y-816.

M-208 is the second California rice cultivar released with resistance to blast race IG-1that is present in California. Blast resistance to IG-1 has been confirmed by multiple greenhouse tests and the utilization of DNA molecular analysis by the USDA-ARS Rice Research Unit,Beaumont, TX and the USDA-ARS Crops Pathology Genetics Research Unit, Davis, CA using different markers.

M-208 was compared to ‘M-206’, ‘M-207’ and ‘M-202’. M-208 1,000 kernel weightaveraged 5% heavier than the other CMRG varieties. Brown rice kernel lengths, widths, and length/width ratios of M-208 are similar to CMRGvarieties. M-208 total and whole kernel milling yields are 1 to 2 points higher than M-207. M-208 total milled rice is similar to M-206and M-202. M-208 whole kernel milled rice is less than M-206 but better than M-202. Laboratory analysis for physicochemical characters (apparent amylose content, alkali score, RVAviscosity, and gelatinization temperature) by the USDA-ARS Research Unit, Beaumont, TX indicate that it fits CRMG standards. Milled rice samples of M-206, M-208, M-207 and M-202were distributed to various California rice marketing organizations and individual rice quality evaluators in 2004 and 2005. Responses indicated M-208 may have minor quality improvementsover M-206 and M-202. M-208 can be commingled with other CRMGs.

M-208 has improvements for lodging, total and whole kernel milling yield over M-207.M-208 is adapted to the majority of M-202 growing areas. Although it has specific application in those areas in Glenn and Colusa counties that have fields with varying degrees of blast damageevery year, it also has the potential to be grown in combination with other CRMGs in other areas. M-208 can be best described as an M-202 type with blast resistance. Fertilization requirementswill be similar to M-202.

Application is being made to protect M-208 under the U.S. Plant Variety Protection Act, Title V option, and for utilitypatents. Breeder and Foundation seed of these cultivars will be maintained by California Cooperative Rice Research Foundation, P.O. Box306, Biggs, CA 95917-0306.

Each agency will make such news releases and other publicity as it considers appropriate on or after the release date of April 15, 2006.