Release of tepary bean TARS-Tep 23 germplasm with broad abiotic stress tolerance and rust and common bacterial blight resistance

Authors: Porch, Timothy - Tim; BARRERA, SANTOS - University Of Nebraska; BERNY MIER Y TERAN, JORGE - University Of California, Davis; DIAZ-RAMIREZ, JAIRO - University Of California; Pastor Corrales, Marcial - Talo; GEPTS, PAUL - University Of California, Davis; URREA, CARLOS - University Of Nebraska; ROSAS, JUAN - Zamorano, Panamerican School Of Agriculture

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/28/2021
Publication Date: 10/21/2022
Citation: Porch, T.G., Barrera, S., Berny Mier Y Teran, J.C., Diaz-Ramirez, J., Pastor Corrales, M.A., Gepts, P., Urrea, C.A., Rosas, J.C. 2022. Release of tepary bean TARS-Tep 23 germplasm with broad abiotic stress tolerance and rust and common bacterial blight resistance. Journal of Plant Registrations. 16:109-119. https://doi.org/10.1002/plr2.20180.
DOI: https://doi.org/10.1002/plr2.20180

Interpretive Summary: Tepary bean is a drought and high ambient temperature tolerant crop that likely originated in the Sonoran Desert, the hottest and driest region in the United States and Mexico. Although tepary bean is an orphan crop with little current commercial production, there was a brief period of larger-scale production in the early 1900s in California. Tepary bean has great potential as a novel crop in the changing world climate and can be introduced as an alternative pulse crop in hot and/or dry regions worldwide. TARS-Tep 23 is an improved tepary bean germplasm with wide-ranging adaptation to tropical and temperate regions experiencing high temperature and drought stress conditions, with broad resistance to the rust disease, and with resistance to common bacterial blight. It has a flat, mottled black seed type with good seed size, a Type III plant habit, and a short crop cycle of 55 to 61 days in the environments tested. This germplasm was developed cooperatively by the USDA-ARS, Zamorano University, the University of California, Davis, and the University of Nebraska. The use of this improved germplasm by farmers in production zones affected by abiotic and biotic stresses, or by breeding programs, can potentially increase seed yields of this climate resilient crop.

Technical Abstract: Tepary bean (Phaseolus acutifolius A. Gray) is a drought and high ambient temperature tolerant crop that likely originated in the Sonoran Desert, the hottest and driest region in the United States and Mexico. Although tepary bean is an orphan crop with little current commercial production, there was a brief period of larger-scale production in the early 1900s in California. Tepary bean has great potential as a novel crop in the changing world climate and can be introduced as an alternative pulse crop in hot and/or dry regions worldwide. TARS-Tep 23 (Reg. No. GP-____, PI ____) is an improved tepary bean germplasm with wide-ranging adaptation to tropical and temperate regions experiencing high temperature and drought stress conditions, with broad resistance to the rust disease, caused by Uromyces appendiculatus, and with resistance to common bacterial blight caused by Xanthomonas axonopodis. It has a flat, mottled black seed type with good seed size, a Type III plant habit, and a short crop cycle of 55 to 61 days in the environments tested. This germplasm was developed cooperatively by the USDA-ARS, Zamorano University, the University of California, Davis, and the University of Nebraska. The use of this improved germplasm by farmers in production zones affected by abiotic and biotic stresses, or by breeding programs, can potentially increase seed yields of this climate resilient crop.