|Miklas, Phillip - Phil|
|Pastor Corrales, Marcial - Talo|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/3/2010
Publication Date: 5/1/2011
Citation: Brick, M., Ogg, B., Johnson, J., Judson, F., Singh, S., Miklas, P.N., Pastor Corrales, M.A. 2011. Registration of 'Croissant' pinto bean. Journal of Plant Registrations. 5:299-303. Interpretive Summary: Pinto bean is the most important dry bean market class grown in the US. No cultivars exist with upright architecture and multiple disease resistance to bacterial, fungal and viral diseases. Croissant pinto bean cultivar was developed with upright architecture and multiple disease resistance against pathogens problematic in the intermountain regions and high plains. This cultivar will enable growers to increase returns by enabling direct harvest and by reducing yield loss caused by disease.
Technical Abstract: ‘Croissant’ (Reg. No. CV-299, PI 656597), a new medium-maturity (94–98 d) pinto bean (Phaseolus vulgaris L.) cultivar was released by the Colorado Agricultural Experiment Station to provide dry bean producers in the USA with a high-yielding cultivar that combines resistance to rust [caused by Uromyces appendiculatus (Pers.) Unger], most strains of bean common mosaic virus (BCMV) and bean common mosaic necrosis virus, and field tolerance to common bacterial blight (CBB) [caused by Xanthomonas axonopodis pv. phaseoli (Smith) Dye, Syn. with X. campestris]. Croissant has a semi-upright architecture (Type IIb) in most environments; however, in environments with high soil N and moisture it can express semi-vine architecture (Type IIIa). Resistance to rust is conditioned by the Ur-3 and Ur-6 dominant alleles, and resistance to BCMV is conditioned by the recessive allele bc22. Croissant possesses the quantitative trait locus (QTL) SAP6, which confers a level of field resistance to strains of CBB endemic to the High Plains of the USA. In 2008 and 2009, the mean seed yield for Croissant was 3102 and 2895 kg ha-1 and the mean seed weights were 36.2 and 36.3 g 100 seed-1 compared with 3142 and 3095 kg ha-1 and 38.2 and 37.7 g 100 seed-1 for the mean of five text cultivars, respectively. Croissant is unique to other recent upright architecture pinto cultivars because it possesses two genes for resistance to rust and the SAP6 QTL to provide a level of resistance to CBB.