Skip to main content
ARS Home » Southeast Area » Stuttgart, Arkansas » Dale Bumpers National Rice Research Center » Research » Publications at this Location » Publication #410398
Research Project: Gene Discovery and Crop Design for Current and New Rice Management Practices and Market Opportunities

Location: Dale Bumpers National Rice Research Center

Title: Discovery and validation of above ground biomass enhancing alleles from a diverse USDA-ARS Aus panel of rice (Oryza sativa L.)

Author
item MITCHELL, JOHN - University Of Arkansas At Pine Bluff
item PONNIAH, SATHISH - University Of Arkansas At Pine Bluff
item Rohila, Jai
item Sookaserm, Tiffany
item Jackson, Aaron
item Edwards, Jeremy
item MCCLUNG, ANNA - Retired ARS Employee
item Huggins, Trevis

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/7/2024
Publication Date: 4/6/2024
Citation: Mitchell, J.R., Ponniah, S.K., Rohila, J.S., Sookaserm, T.B., Jackson, A.K., Edwards, J., McClung, A., Huggins, T.D. 2024. Discovery and validation of above ground biomass enhancing alleles from a diverse USDA-ARS Aus panel of rice (Oryza sativa L.). Meeting Abstract. Association of 1890 Research Directors, Inc. Nashville, Tennessee, April 6-9, 2024.

Interpretive Summary:

Technical Abstract: The above-ground biomass of rice plants is decreased by low soil moisture conditions occurring when water saving practices are used to grow rice. Lower biomass can negatively affect grain yield through the plant's source-sink relationship. Our hypothesis was that the Aus subpopulation of rice, which is adapted to rainfed cultivation in the north-east India and Bangladesh geographic region, may harbor superior alleles for biomass. To test our hypothesis, we evaluated the USDA-ARS Aus Rice Diversity Panel (ADP1), composed of a diverse global collection of 112 accessions, in a four-year field study under rainfed management to evaluate yield and biomass. The field experiment consisted of single-row plots in a randomized complete block design. Later, field-selected accessions were evaluated under controlled environment greenhouse conditions to measure biomass at the seedling stage. Publicly available whole-genome sequence data from 88 of the ADP1 accessions were combined with yield and biomass data to perform a genome-wide association study (GWAS). This analysis revealed potential DNA sequence variants and candidate genes that are associated with differences in biomass and yield. These marker-trait associations will be validated and developed into molecular markers to assist in breeding for rice varieties that are adapted to reduced irrigation conditions.