Recurrent selection for resistance toVerticillium dahliaein pepper

✍ Scribed by A. Palloix; E. Pochard; T. Phaly; A. M. Daubèze

• Book ID: 104618668
• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 657 KB
• Volume: 47
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00040367

✦ Synopsis

Two cycles of recurrent selection were performed in a population including 7 small fruited varieties of pepper (Capsicum annuum) with low resistance level to Verticillium and resistance to other soilborne pathogens . The collaboration of 7 plant breeders in this work and the use of 2 artificial methods of inoculation allowed screening of numerous plants for resistance to V. dahliae under different conditions . The population was simultaneously improved for resistance to V dahliae and for resistance to Phytophthora capsici, and at each cycle, intercrosses were performed between all these plants .The general level of resistance to V. dahliae increased continuously during the 2 cycles of selection . Selfed progenies of plants from the 2 cycles displayed a higher resistance than the original parents, whatever the method of inoculation used . This gave evidence of transgressions for resistance . Crosses involving parents that did not seem resistant by themselves also produced transgressive lines, indicating that resistance genes were present but not active in these varieties .

The transgressive lines with polygenic resistance to V. dahliae were included into a further breeding program to introduce genes of agronomic value .