Original scientific paper

BREEDING MAIZE FOR RESISTANCE TO NORTHERN LEAF BLIGHT (Exserohilum turcicum Pass.)

Branko Palaveršić ; Bc Institute for Breeding and Production of Field Crops, Zagreb
Mirko Jukić ; Bc Institute for Breeding and Production of Field Crops, Zagreb
Katarina Jukić ; Bc Institute for Breeding and Production of Field Crops, Zagreb
Ivan Živković ; Bc Institute for Breeding and Production of Field Crops, Zagreb
Ivica Buhiniček ; Bc Institute for Breeding and Production of Field Crops, Zagreb
Tihomir Jozinović ; Bc Institute for Breeding and Production of Field Crops, Zagreb
Ante Vragolović ; Bc Institute for Breeding and Production of Field Crops, Zagreb
Zdravko Kozić ; Bc Institute for Breeding and Production of Field Crops, Zagreb

Abstract

Northern leaf blight, caused by the fungus Exserohilum turcicum (Pass.) is the
most important leaf disease of maize in humid environments. The first maize hybrids in
the United States were susceptible to this disease. Therefore, breeding program for
resistance was initiated and proved to be very successful. Polygenic and monogenic
resistance were used. However, after 15 years of continuous and extensive use of
monogenic resistance in the United States occurrence of a new pathotype of E.turcicum. race 2 was reported, which was later named race 1, because Ht 1 gene was not
effective against it. New race quickly spread throughout the United States, and later in
Croatia. To study maize resistance to race 1 of E. turcicum a trial was planted with 75
lines of different origin in 2008. The lines from the BSSS heterotic group were
susceptible to race 1 of Exserohilum turcicum with average rating 3,0, while the lines
from the Lancaster heterotic group were resistant with average rating 2,0. In the second
experiment in 2012., 25 maize lines were tsted for resistance to race 0 and race 1 to
detect lines resistant to both races of Exserohilum turcicum. Lines Pa875, Bc210K,
H102, Bc1411, Pa887P, H111 and H95 appear to be resistant to both race 0 and race 1
of Exserohilum turcicum. Monogenic otpornost resistance to race 1 was incorporated
into four maize lines (A632, Bc31002, Bc703-19 i Bc14).

Keywords

maize; northern leaf blight; inbred lines

Hrčak ID:

103345

URI

https://hrcak.srce.hr/103345

Publication date:

28.3.2013.

Article data in other languages: croatian

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