Details for: PI 653259, Phaseolus vulgaris L., 'SAWTOOTH'

Extra large-seeded Sawtooth great northern dry bean has an indeterminate semi-prostrate growth habit Type III with medium to large vine. The central leaflet of fully developed trifoliolate leaf is of ovate shape with average length of 10 cm and width of 8 cm. The flower bracteoles are large chordate. Flower color is white with the absence of stripes at the outer base of the standard. Pods of Sawtooth are distributed along the stem length and branches. At maturity, pods are smooth tan or yellowish-brown color without stripes. Dry pods are flat, slightly curved with straight to curved-down beak. Also, pods may have slight constrictions with an average of 5-6 seeds. Sawtooth has mean maturity of 96 d in southern Idaho with yield of 2219 lbs A-1 and 99 d in Western Regional Bean Trial (WRBT) with yield of 2333 lbs A-1. Mean 100-seed weight was 40 g in Idaho and 45 g in the WRBT. Sawtooth has the dominant I gene resistance to BCMV strains NY-15 and US-6. However, when inoculated with the BCMNV strain NL-3K, Sawtooth exhibits top or systemic necrosis including black root. It has SCAR marker SW 13. Sawtooth is resistant to race 38 of U. appendiculatus, but exhibits small pustules when exposed to race 53. Sawtooth is susceptible to anthracnose, common bacterial blight, Fusarium root rot, halo blight, and white mold. Sawtooth is moderately susceptible to BCTV. Sawtooth has moderate to high levels of resistance to heat, intermittent drought, and to soil zinc deficiency and manganese toxicity. Sawtooth is a full-season cultivar developed for 100 d frost-free bean production regions of southern Idaho. However, Sawtooth has exhibited a broad adaptation in relatively warmer bean growing environments in the Western USA. Because of its semi-prostrate growth habit and lack of resistance to anthracnose and white mold Sawtooth may have limited adaptation in or not suited to the relatively cool and wet production environments.

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• Singh, S. P., H. Teran, M. Lema, M. F. Dennis, R. Hayes, & C. Robinson. 2008. Development of Large-Seeded High-Quality, High-Yielding Great Northern Dry Bean ‘Hungerford’ and ‘Sawtooth’. J. Pl. Registr. 2(3):174. DOI: 10.3198/jpr2007.12.0709crc. Number of accessions cited: 2

• Singh, S. P., H. Teran, M. Lema, M. F. Dennis, R. Hayes, & C. Robinson. 2008. Development of Large-Seeded High-Quality, High-Yielding Great Northern Dry Bean ‘Hungerford’ and ‘Sawtooth’. J. Pl. Registr. 2(3):174. DOI: 10.3198/jpr2007.12.0709crc.

U.S. Plant Variety Protection