Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094
July 2017 Vol. 6(7): pp. 188-196
Copyright © 2017 Global Advanced Research Journals

 

Full Length Research Paper

Response of Germplasm of Solanum spp. to Permanent Tomato Yellowing Disease Transmitted by Bactericera cockerelli (Sulc.)

López-Benítez Alfonso, Gayosso-Barragán Odilon*, Rodríguez-Herrera Sergio Alfredo, Alcala-Rico Juan Samuel, Vizcarra-López Manuel, Espinosa-Velazquez Jose

 

Departamento de Fitomejoramiento, Universidad Autónoma Agraria Antonio Narro, Saltillo, Coahuila, México CP 25315.

Email: gayosso_0188@yahoo.com.mx

Accepted 01 July, 2017

 

Abstract

Bactericera cockerelli (Sulc.) vector of the permanent tomato yellowing disease causes considerable losses in tomato crop (Solanum lycopersicum L). Its control is based on application of insecticides which is unsatisfactory and needs an increase in the number of applications. The aim of this work was to evaluate the response of a group of genetic material of Solanum species to the natural incidence of the permanent disease of tomato in field conditions and to determine the inheritance of resistance of this disease. We evaluated 53 introductions of Solanum species from the genetic resources conservation program of the University of California at Davis. Disease incidence data were recorded and the area under disease progress curve (AUDPC) was determined. Significant differences (p≤0.05) were observed for disease incidence and AUDPC. The genotypes L. chilense LA 1959, L. chilense LA 1963 and L. chilense LA 2884 showed the lowest values ​​of incidence of disease and AUDPC (10, 16, 23 and 159, 214, 206 respectively) considered to be resistant. Crosses between susceptible and resistant progenitors showed phenotypic proportions of resistant plants: susceptible to 1:15; which are consistent with the hypothesis that partial resistance shown is controlled by two homozygous genes in a recessive condition.

Keywords: Solanum, resistance, germplasm.


 

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