Abstract
Meso-american and Andean eommon bean genotypes were inoeulated with mycellium of Thanatephorus cucumeris (Frank), Donk to determine: 1- The interaction among different isolations of Rhizoclonia solani, Kuhn and bean genotypes from two genetic pools, 2- the heritability of resistance to web-blight and 3- the existing genic completion between the meso-american and Andean pools, respeetively. The results found in this experiment were as follows : the strains vary depending of the origin site. Thus, the Dominican Republic and Colombian strains cause a lesser damage to the bean plants. The Panama # 1 isolation is moderately slow, and the Panama # 2 and Costa Rica caused the largest damage to the crop. The RS- 32-Cr strain was the most virulent of all. The heritabiJity shown by crossing was high which indieates that there is genic completion between the meso-ameriean and the Andean pools, respectively. The erossing of of AFR-251 x BAT-1155, in a direct and reciprocal way, showed differences in the F1 and the F2, indicating that the resistance to the disease is controlled by cytoplasmie genes as by nuclear genes. The type of resistance shown by the different evaluated crosses was horizontal and not vertical resistance.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
