Registration of ‘Coral’ pink bean

Abstract

‘Coral’ (Reg. no. CV-359, PI 705151) pink bean (Phaseolus vulgaris L.), developed by Michigan State University AgBioResearch was released in 2022 as a midseason, disease-resistant, upright short vine bean cultivar with uniform dry down. Coral was developed with the pedigree breeding method to the F₄ generation followed by pure line selection for disease, agronomic, and quality traits. Coral combines high yield potential with midseason maturity in a pink bean seed type. Over the span of 6 years of field trials, Coral produced an average yield of 3228 kg ha⁻¹, flowered at 46 days, and matured in 97 days. Plants averaged 48 cm in height, with a lodging resistance score of 1.4, and seed size of 42 g 100 seed⁻¹. Notably, Coral has outperformed ‘Rosetta’ by 8% across the 6-year trial period and reached maturity 1 day earlier. It is well adapted to the intensively managed, narrow-row, direct-harvested production systems where beans are typically grown in Michigan and the Upper Midwest. Coral exhibits resistance to Bean common mosaic virus, is susceptible to anthracnose, has shown tolerance to common bacterial blight, and white mold. Additionally, it demonstrated tolerance to root rot caused by Rhizoctonia solani similar to Rosetta. Seed size of Coral (42 g 100 seed⁻¹) is larger than Rosetta (37 g 100 seed⁻¹). Seed of Coral meets industry standards for packaging and canning quality in the pink bean seed class.