Rice Variety Trials, 2022


Bruce A. Linquist, UCCE rice speicalist, Dept of Plant Sciences, UC Davis

It is easy to discuss the latest varietal advances coming out of RES, but no one would know how a new variety might perform in their growing region without this project. This project seeks to remove some of the uncertainty surrounding a new variety by comparing it to varieties already familiar to you.

Six on-farm rice variety evaluation trials were conducted throughout the rice growing region of California, with standard varieties compared to preliminary and advanced lines across a range of environments, cultural practices, and disease levels. One similar test was conducted at the RES in Biggs, CA. Average yield across varieties and locations in the four-replication advanced line tests was 8,300 lbs./acre. A second consecutive dry winter and water shortage allowed field preparation and planting to be completed in early May. All statewide tests were planted by May 21st. Several advanced lines in 2022 produced high yields as well as demonstrating important breeding goals aside from yield (disease resistance, grain quality, specialty types, etc.). Testing advanced and preliminary lines under a variety of conditions remains a critical aspect of releasing varieties adapted to changing cultural practices, markets, and pests.

You are encouraged to examine the full report linked here and look over the data for the trial near you. The zones for the trials are described on pages 2-3, and the results start on page 5. These results allow you to compare how different varieties performed in an area similar to yours.

Project RM-2 was involved in the planting, sampling, and harvesting 9 trial sites throughout the rice growing area. This project was also involved in several educational activities including the winter rice grower meetings, the RES rice field day, fact sheets and publications, and updating of the UCCE rice website.