Journal of Food, Agriculture and Environment

Characterization of genetic resistance to anthracnose in Mesoamerican common bean cultivar Mexico 222

Author(s):

Paula S. Perioto ¹, Maria C. Gonçalves-Vidigal ¹, Juliana P. Poletine ¹, Sandra A. de Lima Castro *, Vânia Moda-Cirino ²

Recieved Date: 2015-05-09, Accepted Date: 2015-09-11

Abstract:

Common bean is an important constituent of Brazilians diet, however, it may be affected by anthracnose disease caused by Colletotrichum lindemuthianum fungus. Mexico 222 is a common bean cultivar resistant to 77 races of this fungus. Due to the importance of this cultivar, the present work aimed to study the resistance inheritance of Mexico 222 to races 7 and 23 of C. lindemuthianum, as well as to verify the independence of genes present in this genotype, in relation to alleles from Co-4, Co-7 and Co-9 loci. The study of resistance inheritance was conducted in F₂ populations from crosses between Mexico 222 (resistant to race 7) × Michigan Dark Red Kidney (susceptible to race 7) and between Mexico 222 (resistant to race 23) × Widusa (susceptible to race 23). Allelism studies were performed in F2 generations of crossings between Mexico 222 × MSU 7-1, Mexico 222 × PI 207262 and Mexico 222 × BAT 93, inoculated with race 7 of C. lindemuthianum. Results revealed that Mexico 222 cultivar presents two dominant genes for resistance to race 7 and only one dominant gene for resistance to 23 race. F₂ generations from crosses between Mexico 222 with MSU 7-1, PI 207262 and BAT 93 cultivars, inoculated with race 7 revealed allelism presences. Therefore, results obtained for allelism tests indicated that the resistance to race 7 of anthracnose in Mexico 222, MSU 7-1, PI 207262 and BAT 93 cultivars is conferred by genes closely linked or by dominant resistance alleles of the same single locus.

Keywords:

Colletotrichum lindemuthianum, resistance inheritance, Phaseolus vulgaris L., anthracnose, cultivars

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Journal: Journal of Food, Agriculture and Environment
Year: 2015
Volume: 13
Issue: 3&4
Category: Agriculture
Pages: 96-100

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