Rice Variety Profile for A-202

Early maturing, semidwarf, smooth hulled (glabrous), aromatic long-grain.

RES Rice Varieties

Variety: A-202

  • Former ID: 11Y1049
  • Year: 2014

A-202 is an early maturing, semidwarf, smooth hulled (glabrous), aromatic long-grain rice cultivar.  It was developed by the California Cooperative Rice Research Foundation, Inc. (CCRRF) at the Rice Experiment Station (RES), Biggs, CA and released to growers in April 2014. A-202 is protected under the US Plant Protection Act, Title 5 (to only be sold as a class of certified seed) as well as a US Plant Utility Patent. A-202 is available exclusively to California rice growers, export of seed is prohibited, and use in genetic or breeding research requires a Material Transfer Agreement.

Pedigree and Breeding

Its pedigree is 94Y39//Jasmine85/Della/3/L-204/95Y442. The female parent is a low amylose soft cooking aromatic, jasmine type selection with experimental designation 03Y551. Developed at RES, 94Y39 is a low amylose non-aromatic long grain and Jasmine 85 is a pubescent low amylose aromatic variety developed by USDA-ARS, Beaumont, Texas. Della is an intermediate amylose, aromatic, tall variety released by LSU Rice Research Station, Crowley, Louisiana. L-204 is an early maturing conventional cooking type variety with distinctive bold grains released by CCRRF in 1996. 95Y442 is a high yielding non-aromatic selection developed at the RES. A-202 was tested in 2012-13 University of California Cooperative Extension (UCCE) statewide tests under the experimental designation 11Y1049. It was released as a replacement for A-301.

Agronomic Characteristics

 Table 1 contains a summary of the agronomic data collected in the UCCE Statewide Yield Tests. Seedling vigor score of A-202 is considerably higher than A-301 and slightly lower than A-201. Days to 50% heading is 9 and 4 days earlier than A-301 and A-201, respectively. Both seedling vigor and early maturity are desirable agronomic traits for organic production system. Plant height of A-202 is 5 and 2 inches taller than A-301 and A-201, respectively. Lodging potential is not significantly different from either variety. Susceptibility to cold induced blanking (greenhouse blanking score), is significantly higher than A-201 and same as A-301.

Growers are recommended to bleach treat seed for Bakanae. Reactions to stem rot and aggregate sheath spot pathogens of A-202 are not significantly different from A-201 and A-301No marked difference in sensitivity to standard rice herbicides from the parent varieties has been observed; however, commercial experience is limited. A-202 is susceptible to the race of blast disease found in California in RES greenhouse tests. However the field resistance of A-202 to blast is not known.

A-202: Agronomic performance in UCCE Statewide Yield Tests 2012-2014

†Seedling = seedling vigor score, where 1=poor and 5=excellent.
‡SR = stem rot score, where 0 = no damage and 10 = plant killed.

A-202: 2nd table (need title)

† lb/acre at 14% moisture.

Milling and Quality

A-202 has shown higher head rice yield than other aromatic varieties (Table 1). Timely harvest and proper handling is recommended to preserve milling as well as cooking qualities of this variety. Based on milling study results, optimum harvest moisture is 18 to 20 percent. Milled rice kernels of A-202 are distinctly bolder than other long grain varieties and have a higher degree of whiteness than A-301. Compared to A-301, milled kernels of A-202 are slightly shorter and slightly wider resulting in a larger surface area. The weight of 100 kernel of A-202, at 2.26 grams is also higher than other long grain varieties.

Apparent amylose content is 23.8 percent which is within the range of conventional cooking quality types such as A-301 and L-206. Alkali spreading value is intermediate type, RVA amylographic profile is moderate, similar to A-301 and L-206. This is different than A-201 which is considered to have weak amylogram.  Aroma volatilization is slightly lower than A-301 and higher than A-201. Flavor sensory of this line, however, is similar to A-301. A-202 was evaluated by 3 marketing organization in 2012 and 2013 for cooking qualities and was considered acceptable.

Area of Adaptation

The performance data collected at the RES and by UCCE indicates A-202 is adapted to warmer areas of the California rice growing region. Greenhouse tests indicate that this line, similar to A-301, is susceptible to cold induced blanking and therefore not adapted to cold locations. Statewide test locations during 2012 and 2013 included the early maturity group, which are located at the RES and Butte, Colusa, and Yuba counties. Commercial production field yields were above 90 cwt/acre in 2014 and 2015.  Primary use of this line is for aromatic specialty market as a replacement for A-301. It is also well adapted for organic production systems.

Variety Photos
  • Ashley Averitt

    Maintenance and Operator

    Ashley is a maintenance and operator of California Cooperative Rice Research Foundation.

  • Deven Benson

    Maintenance and Operator

    Deven is a maintenance and operator of California Cooperative Rice Research Foundation.

  • Randy Jones

    Field Supervisor

    Randy is the field supervisor of California Cooperative Rice Research Foundation.

  • Joe Martin

    Plant Breeder Assistant

    Joe is a plant breeder assistant for the California Cooperative Rice Research Foundation (CCRRF). His primary focus at CCRRF is to assist in the short grain breeding program. He received his BS in Plant Biology from the University of California Davis. He is currently enrolled in the Plant Breeding Academy at UC Davis to help further his knowledge in plant breeding.

  • Gabriel Janish

    Plant Breeder Assistant

    Gabriel is a plant breeder assistant for the California Cooperative Rice Research Foundation.

  • Davinder Singh

    Plant Breeder Assistant

    Davinder is a plant breeder assistant for the California Cooperative Rice Research Foundation (CCRRF). His primary focus at CCRRF is to assist in the long grain breeding program.

  • Ravinder Gakhal

    Senior Plant Breeder Assistant

    Ravinder is a senior plant breeder assistant for the California Cooperative Rice Research Foundation (CCRRF). His primary focus at CCRRF is to assist in the medium grain breeding program.

  • Baldish Deol

    Senior Plant Breeder Assistant

    Baldish is a senior plant breeder assistant for the California Cooperative Rice Research Foundation.

  • George Yeltatzie

    Genetics Lab Technician

    George is the genetics lab technician for the California Cooperative Rice Research Foundation.

  • Frank Maulana, Ph.D.

    Short Grain Breeder

    Dr. Frank Maulana is a rice breeder for the California Cooperative Rice Research Foundation (CCRRF). He is leading a short grain breeding program to develop improved short grain rice varieties for five market classes, including conventional or regular, low amylose, sweet or waxy, premium quality and arborio or bold grain. The objectives of the program include developing rice varieties with high and stable yield, high milling grain yield, seedling vigor, cold tolerance, lodging resistance, and disease resistance. He received a BS in Crop Science from Lilongwe University of Agriculture and Natural Resources (LUANAR) in Malawi. Then, he worked as a plant breeder at the Agricultural Research and Extension Trust (ARET) for five years. He then went on to obtain PhD and MS in Plant Breeding and Genetics from Kansas State University (KSU), Manhattan, KS. Before joining CCRRF, he was a postdoctoral researcher at Louisiana State University (LSU) AgCenter-Rice Breeding program. His research project at LSU focused on implementation of genomic selection in an applied rice breeding program.

  • Gretchen Zaunbrecher, Ph.D.

    Genetics Lab Director

    Dr. Zaunbrecher is the Genetics Lab Director for the California Cooperative Rice Research Foundation (CCRRF).  The Genetics Lab utilizes marker assisted analysis to provide valuable genetic information to assist the breeders in rice varietal improvement.  In addition, through traditional mutational breeding as well as gene editing, we hope to develop new varieties of rice with enhanced yield, herbicide, and disease resistance, and other agronomically valuable traits.

  • Nirmal Sharma, Ph.D.

    Long Grain Breeder

    Dr. Nirmal Sharma is a plant breeder for the California Cooperative Rice Research Foundation (CCRRF), leading the long grain breeding project and incorporating disease resistance, high milling yield, seedling vigor, cold tolerance, and herbicide resistance into future rice varieties. He received his BS in Agriculture and MS in Biotechnology from Bangladesh Agricultural University. Then, he worked as a breeder in the Plant Breeding Division of the Bangladesh Rice Research Institute (BRRI) for several years. Next, he moved to the United States to pursue his PhD in crop sciences at the University of Illinois at Urbana-Champaign (UIUC). Upon completing his degree, he was a postdoctoral fellow at the Noble Research Institute before joining CCRRF.

  • Teresa B. De Leon, Ph.D.

    Medium Grain Breeder

    Dr. Teresa B. De Leon is currently leading the improvement and variety development of CCRRF medium grain project. She previously led the short grain breeding project from 2018-2021. Prior to her employment at the station, she worked as Plant Geneticist to University of California Davis for identification, origin, and prevention of weedy red rice. She developed pre-breeding and introgression lines of Louisiana rice with improved salinity tolerance for Louisiana State University Agricultural Center. As Assistant Scientist and Research Scholar, she has also worked at the International Rice Research Institute (IRRI) and University of the Philippines at Los Banos on disease resistance of rice and other crops. With several years of experience in rice research and development, Dr. De Leon is integrating the use of conventional and molecular tools in breeding for medium grains with high yield potential, high grain quality, wide adaptation, cold tolerance, disease and herbicide resistance, and most importantly, a rice with excellent cooking and taste quality for consumers.

  • Emily Schaaf

    Executive Assistant

    Emily is the executive assistant of California Cooperative Rice Research Foundation.

  • Dustin Harrell, Ph.D.


    Dr. Dustin Harrell has been the Director of the California Cooperative Rice Research Foundation Rice Experiment Station since November of 2021. Prior to his current leadership position, he held positions as the Resident Coordinator of the LSU AgCenter’s Rice Research Station, the Extension Rice Specialist for the state of Louisiana, and the project leader for the Rice Fertility and Agronomy Project at the LSU Rice Experiment Station.