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ARS Home » Southeast Area » Stuttgart, Arkansas » Dale Bumpers National Rice Research Center » Research » Publications at this Location » Publication #421883
Research Project: Broadening and Strengthening the Genetic Base of Rice for Adaptation to a Changing Climate, Crop Production Systems, and Markets

Location: Dale Bumpers National Rice Research Center

Title: Identification of rice genes involved in chalkiness, seed traits and disease resistance

Author
item Jia, Yulin
item Dunlap, Heather
item Jia, Melissa
item Braithwaite, Paul
item BURNETT, JONTESHA - University Of Arkansas At Pine Bluff

Submitted to: Rice Technical Working Group Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 12/13/2024
Publication Date: 1/5/2026
Citation: Jia, Y., Dunlap, H.N., Jia, M.H., Braithwaite, P.R., Burnett, J. 2026. Identification of rice genes involved in chalkiness, seed traits and disease resistance. Rice Technical Working Group Meeting Proceedings. New Orleans, Louisiana. February 14-17, 2025.

Interpretive Summary:

Technical Abstract: Understanding how plants utilize limited resources for reproductivity, quality, and disease resistance can improve the efficiency of rice breeding. Quality traits are desirable now more than ever due to years of low-quality grains. The developmental mechanism of grain traits such as chalk is greatly unknown but the ability of map it over chromosomes is not which is where we begin this story. Desirable traits are important for a visually appealing food. Consumers are visual and lines with poor milling quality, although may have strong yields, visually they are disappointing and result in losses for industry and farmers. By mapping desired genes, the information enables selection for both quality and high yielding lines in future breeding. In this study a recombinant inbred line population of 250 individuals was derived from a cross of a widely used indica restorer variety MingHui63 and a temperate japonica variety M202. This population was used to Biparental map phenotypes and identify their locations on each chromosome. Population data for chalk, branch count, grain length, grain width, and thousand grain weight data were analyzed. Genes and alleles were identified for seed size, chalkiness and disease resistance within small genetic intervals. A better understanding of how genes controlling these traits will help us to improve rice germplasm with superior milling and total yields using gene editing.