Trangressive segregation for resistance in wheat to <i>Septoria tritici</i> 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)