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ARS Home » Southeast Area » Mayaguez, Puerto Rico » Tropical Crops and Germplasm Research » Research » Publications at this Location » Publication #341719

Research Project: Genetic Enhancement of Common Bean Using Exotic Germplasm for Biotic and Abiotic Stress Tolerance

Location: Tropical Crops and Germplasm Research

Title: Advances in tepary bean (Phaseolus acutifolius A. Gray) genetics and breeding

Author
item Porch, Timothy - Tim
item RODRIGUEZ, IVETH - University Of Puerto Rico
item Hart, John
item VARGAS, ANA - University Of Puerto Rico
item ROSAS, JUAN CARLOS - Zamorano, Panamerican School Of Agriculture
item BRICK, M. - Colorado State University
item BEAVER,, J.S. - University Of Puerto Rico

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 4/30/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary: Tepary bean is a drought and heat-tolerant sister species of common bean with similar nutritional characteristics and with potential for expanded production in agroecological zones that are marginal due to abiotic stress. A key to expanded production of this orphan crop is the improvement of biotic stress tolerance such as resistance to bean common mosaic virus (BCMV, BCMNV), bean golden yellow mosaic virus (BGYMV), and rust resistance for tropical and temperate zones. Using the recently developed tepary diversity panel (TDP) and a RIL population genetic analyses were conducted on key agronomic, disease and seed characteristics under multiple conditions in field and greenhouse trials. A roughly equal number of wild and cultivated tepary lines compose the 314 in the TDP and there are 140 lines in the RIL population that were all genotyped using genotyping-by-sequencing and aligned to the common bean reference genome. Agronomic, phenological, and seed characteristics were mapped and the trial results are informing the selection of parents in the breeding program that has developed novel germplasm, including the released small white TARS-Tep 22. These data were also used to evaluate the domestication status, morphological classification, and geographical distribution of the TDP, and are informing the development of additional tepary bean genomic resources.

Technical Abstract: Tepary bean is a drought and heat-tolerant sister species of common bean with similar nutritional characteristics and with potential for expanded production in agroecological zones that are marginal due to abiotic stress. A key to expanded production of this orphan crop is the improvement of biotic stress tolerance such as resistance to bean common mosaic virus (BCMV, BCMNV), bean golden yellow mosaic virus (BGYMV), and rust resistance for tropical and temperate zones. Using the recently developed tepary diversity panel (TDP) and a RIL population, G40001/G40022, GWAS and QTL analyses were conducted on key agronomic, disease and seed characteristics under multiple conditions in field and greenhouse trials. A roughly equal number of wild and cultivated tepary accessions compose the 314 lines in the TDP and there are 140 F5-derived lines in the RIL population that were all genotyped using ApeKI genotyping-by-sequencing and aligned to the P. vulgaris reference genome. Agronomic, phenological, and seed characteristics were mapped and the trial results are informing the selection of parents in the breeding program that has developed novel germplasm, including the released small white TARS-Tep 22. These data were also used to evaluate the domestication status, morphological classification, and geographical distribution of the TDP, and are informing the development of additional tepary bean genomic resources.