NDLI: Dominant gene for common bean resistance to common bacterial blight caused by Xanthomonas axonopodis pv. phaseoli

Content Provider	Springer Nature Link
Author	Zapata, Mildred Beaver, James S. Porch, Timothy G.
Copyright Year	2010
Abstract	The common bacterial blight pathogen [Xanthomonas axonopodis pv. phaseoli (Xap)] is a limiting factor for common bean (Phaseolus vulgaris L.) production worldwide and resistance to the pathogen in most commercial cultivars is inadequate. Variability in virulence of the bacterial pathogen has been observed in strains isolated from Puerto Rico and Central America. A few common bean lines show a differential reaction when inoculated with different Xap strains, indicating the presence of pathogenic races. In order to study the inheritance of resistance to common bacterial blight in common bean, a breeding line that showed a differential foliar reaction to Xap strains was selected and was crossed with a susceptible parent. The inheritance of resistance to one of the selected Xap races was determined by analysis of segregation patterns in the F1, F2, F3 and F4 generations from the cross between the resistant parent PR0313-58 and the susceptible parent ‘Rosada Nativa’. The F1, F2 and F3 generations were tested under greenhouse conditions. Resistant and susceptible F3:4 sister lines were tested in the field. The statistical analysis of all generations followed the model for a dominant resistance gene. The resistant phenotype was found to co-segregate with the SCAR SAP6 marker, located on LG 10. These results fit the hypothesis that resistance is controlled by a single dominant gene. The symbol proposed for the resistance gene is Xap-1 and for the bacterial race, XapV1.
Starting Page	373
Ending Page	382
Page Count	10
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	179
Issue Number	3
e-ISSN	15735060
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gene-for-gene interaction Host-pathogen interaction Resistance gene Pathogenic races Phaseolus vulgaris Plant Physiology Plant Genetics & Genomics Biotechnology Plant Sciences Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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