Trangressive segregation for resistance in wheat to Septoria tritici blotch

Abstract

An experiment was carried out to study the inheritance of resistance in F6 progenies obtained from 36 crosses involving 14 wheat cultivars. Transgressive segregation towards more resistance and/or more susceptibility to Septoria tritici blotch in wheat occurred in most of the crosses. With so many parents, most showing transgression, the conclusion is that a fair number of loci is involved. The combination of quantitative resistance and transgressive segregation is indicative of at least some genes operating in an additive way.


Key Words: Quantitative resistance, Septoria tritici, wheat


(African Crop Science Journal 8(3) 2000: 213-222)