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ARS Home » Plains Area » El Reno, Oklahoma » Oklahoma and Central Plains Agricultural Research Center » Peanut and Small Grains Research Unit » Research » Publications at this Location » Publication #383833
Research Project: Genetic Improvement of Peanut for Production in the Southwest United States Region

Location: Peanut and Small Grains Research Unit

Title: Field measurements, yield, and grade of the U.S. minicore under water deficit stress

Author
item BUROW, MARK - Texas A&M University
item BALOTA, MARIA - Virginia Tech
item SARKAR, S - Virginia Tech
item Bennett, Rebecca
item Chamberlin, Kelly
item WANG, NING - Oklahoma State University
item White, Michael
item Payton, Paxton
item Mahan, James
item DOBREVA, ILIYANA - Texas A&M University
item RUIZ, HENRY - Texas A&M University
item BARRIOS-PEREZ, ILSE - Texas A&M University
item ADAMS, TYLER - Texas A&M University
item HAYS, DIRK - Texas A&M University
item CHAGOYA, JENNIFER - Texas A&M Agrilife
item SUNG, CHENG-JUNG - Texas Tech University

Submitted to: American Peanut Research and Education Society Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 3/31/2021
Publication Date: 7/15/2021
Citation: Burow, M.D., Balota, M., Sarkar, S., Bennett, R., Chamberlin, K., Wang, N., White, M., Payton, P., Mahan, J., Dobreva, I., Ruiz, H.G., Barrios-Perez, I., Adams, T., Hays, D.B., Chagoya, J., Sung, C.J. 2021. Field measurements, yield, and grade of the U.S. minicore under water deficit stress. In proceedings: American Peanut Research and Education Society, July 12-16, 2021, Dallas, Texas. Avaliable: https://apresinc.com/2021-annual-meeting-presentations/.

Interpretive Summary: Drought stress is an increasing problem for peanut production with climate change and limited water availability, but much work remains in developing drought-resistant cultivars. To learn more about the range of responses to drought in the U.S. germplasm collection, we grew the minicore collection in replicated trials under water-limiting conditions in Virginia, Oklahoma, and Texas in 2017, and in Virginia in 2018. The minicore accessions were evaluated for flower production, chlorophyll content, canopy temperature, leaf folding, wilting, pod yield, and other characteristics. Significant differences were observed among the peanut accessions for all traits. Many accessions responded similarly to drought stress across the three environments, and those with high yield and seed quality were identified. These results will be used to help identify genetic markers associated with drought resistance.

Technical Abstract: The U.S. minicore collection was grown in replicated trials under water limiting conditions in Virginia, Oklahoma, and Texas in 2017, and in Virginia in 2018. Data on grade were taken in TX in 2017, and on 100 seed weight in TX and OK. Data collected during the growing season included flower count, SPAD chlorophyll meter reading (SCMR), normalized difference vegetation index (NDVI), canopy temperature, leaf closure rating, wilting rating, plant height and plant width. Pod yield was measured after harvest. Additional data on harvest index and ground penetrating radar were taken in 2018 and 2019. Significant differences were observed among genotypes for all traits measured. Many minicore accessions had consistent phenotypic responses across environments, and significant correlations among traits across locations were observed. Accessions with high yield, grade, and 100 seed weight were identified. Stepwise regression models to explain yield based on ground-based measurements were developed.