`Chase' Pinto Dry Bean

Abstract

Additional index words. Phaseolus vulgaris, rust, common bacterial blight, halo blight, bacterial brown spot, white mold The release of 'Chase' fulfills a need in southwestern Nebraska for a Pinto dry bean cultivar (Phaseolus vulgaris L.) with resistance to rust [Uromyces appendiculatus (Pers.) Unger] and several bacterial diseases. Rust, common bacterial blight [Xanthomonas campestris pv. phaseoli (Smith) Dye], and bacterial brown spot (Pseudomonas syringae pv. syringae van Hall) diseases have recently reduced bean yields and seed quality of Pinto dry beans in that region and northeastern Colorado. 'Chase' is the first Pinto cultivar that combines resistance to rust(races of rust prevalent in recent years in Nebraska and Colorado), bacterial brown spot, halo blight [P. syringae pv. phaseolicola (Burkholder)], moderate resistance to common blight, and moderate avoidance of white mold [Sclerotinia sclerotiorum (Lib.) de Bary] due to a porous canopy. 'Chase' also has resistance to potato leafhopper "bum" injury caused by Empoasca fabae Harris. OriginWe deemed it important to develop an early maturing Pinto line with resistance to rust and common blight and with moderate avoidance to white mold. 'Chase' (evaluated as PWM 2 -89-5 from 1989 to 1992) was derived by pedigree selection (Fig. 1) from a cross of a Nebraska (NE) Great Northern (GN) breeding line GN WM 2 -84-17 (upright plant habit, moderately early, resistant to common bacterial blight and rust, and moderate avoidance of white mold) and a NE Pinto (P) breeding line PWM 2 -84-45 (prostrate habit, early maturity, good Pinto seed size and shape, rust-

Breeding Common Bean for Resistance to White Mold: A Review

“…However, introgressing white mold resistance from P. coccineus accessions G 35171 and PI 433246 and P. dumosus accession G 35877 was not successful, possibly because of elimination of whole chromosomes and/or segments carrying the white mold resistance genes and/or QTL and related incompatibility problems common in interspecies crosses (Manshardt and Bassett, 1984; Singh et al, 2009a). White mold resistance derived from P. vulgaris × P. coccineus populations appeared to be higher and more stable across multilocation greenhouse and field environments (Steadman et al, 2001) than that available in pinto ‘Chase’ (Coyne et al, 1994) and breeding line USPT‐WM‐1 (Miklas et al, 2006a). Singh et al (2009a, 2012) developed white mold resistant interspecific breeding line VRW 32 by recurrent backcrossing of ICA Pijao with P. costaricensis accession G 40604.…”

Gamete selection for improving physiological resistance to white mold in common bean

“…USPT-CBB-1 is a pinto breeding line from USDA-ARS, Prosser with growth habit type II, moderate resistance to common bacterial blight, and a susceptible reaction to WM. Interspecific breeding line 92BG-7 derived from a cross between P. vulgaris/ P. coccineus has small black seed, indeterminate type III growth habit, partial resistance to WM, and resistance to BCMV and rust (Miklas et al 1998 (Coyne et al 1994). Like 92BG-7, I9365-25 is an interspecific breeding line derived from the cross between P. vulgaris and P. coccineus.…”

QTL Analysis of ICA Bunsi‐Derived Resistance to White Mold in a Pinto × Navy Bean Cross

“…An integrated strategy encompassing crop rotation, minimum fertilizer rate, reduced irrigation, timely fungicide application, and less susceptible cultivar, is used to manage white mold disease in bean (Schwartz and Steadman, 1989). A few pinto cultivars, Chase (Coyne et al, 1994) and Maverick (Grafton et al, 1997), possess a low level of partial resistance to white mold. Pinto bean cultivars with moderate to high levels of partial resistance have not been developed yet because resistance is difficult to breed for, due in part to low heritability (Fuller et al, 1984; Lyons et al, 1987; Kolkman and Kelly, 2002; Miklas and Grafton, 1992; Miklas et al, 2004; Park et al, 2001).…”