Registration of ‘Long’s Peak’ Pinto Bean

Authors: BRICK, MARK - Colorado State University; OGG, JAMES - Colorado State University; SCHWARTZ, HOWARD - Colorado State University; JOHNSON, JERRY - Colorado State University; JUDSON, FRED - Colorado State University; Pastor Corrales, Marcial - Talo

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/29/2015
Publication Date: 8/6/2015
Publication URL: http://doi:10.3198/jpr2015.02.0005crc
Citation: Brick, M.A., Ogg, J.B., Schwartz, H.F., Johnson, J.J., Judson, F., Pastor Corrales, M.A. 2015. Registration of ‘Long’s Peak’ Pinto Bean. Journal of Plant Registrations. 9:279-282.

Interpretive Summary: Producers of pinto beans, the most widely grown and consumed market class of dry beans in the USA, desire cultivars that are easy to harvest, have high yield potential, excellent seed quality, and resistance to diseases that reduces production costs. We are registering ‘Long’s Peak’ to provide dry bean growers with a new high yielding pinto dry bean cultivar with disease resistance, upright architecture, and excellent seed quality. Long’s Peak has broad resistance to all strains that occur in the USA of the highly virulence-variable bean rust pathogen. In addition, Long’s Peak has resistance to most strains of the seedborne, insect-vectored bean common mosaic and bean common mosaic necrosis potyviruses. The two rust resistance genes as well as the gene for resistance to the two potyviruses in Long’s Peak were transferred from two rust resistant lines developed by the ARS-USDA Beltsville, MD bean Project. Moreover, Long’s Peak has upright architecture required for direct harvest and to reduce the incidence of the devastating white mold disease caused by a soiborne pathogen. Cultivars with upright and open architecture tend to avoid white mold. Long’s Peak is expected to benefit pinto dry bean producers in the high planes and Western USA.

Technical Abstract: Methods to harvest dry edible bean (Phaseolus vulgaris L.) have changed dramatically in the past 20 years to accommodate direct harvest systems that eliminate the need to undercut and windrow the crop before it can be threshed. Direct harvest systems cut the bean plant with a sickle bar on the combine header rather than with a knife that cuts and lifts the plant in conventional harvest systems. However, direct harvest systems require cultivars to have an upright CIAT Type II plant architecture. Long’s Peak (Reg. No. CV- ,) was released by the Colorado Agricultural Experiment Station to provide dry bean growers with a high yielding pinto bean cultivar with upright plant architecture and disease resistance. It has medium maturity (95 to 99 d) and combines resistance to common rust [caused by Uromyces appendiculatus (Pers.) Unger], most strains of Bean common mosaic virus (BCMV) and Bean common mosaic necrosis virus (BCMNV) (both seed-borne, insect-vectored potyviruses) with excellent seed color and weight. Resistance to rust is conditioned by the combination of the Ur-3 and Ur-11 dominant alleles, resistance to BCMV is conditioned by the recessive allele bc22. Mean seed yield over 10 and 11 locations in the Cooperative Dry Bean Nursery in 2011 and 2012, respectively was 3109 and 2840 kg ha-1 for Long’s Peak compared to 3022 and 2856 kg ha-1 for the mean of five test cultivars. Mean seed weight for Long’s Peak was 38.3 and 37.4 g 100 seed-1, compared to the mean 39.8 and 37.7 g 100 seed-1 among the test cultivars in 2011 and 2012, respectively. Harvest maturity was similar for the four upright cultivars. Long’s Peak will provide dry bean producers in the western USA a pinto cultivar that has medium-season maturity (95 to 99 d), high yield potential, excellent pinto seed quality, and resistance to endemic pathogens.