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