An α-amylase gene from aegilops ventricosa transferred to bread wheat together with a factor for eyespot resistance

Abstract

VPM 1, a bread wheat with eyespot resistance derived from Aegilops ventricosa, was shown to have a characteristic α-amylase allele on chromosome 7D, α-Amy-D2b, also derived from Ae. ventricosa. Chromosome substitution lines confirmed that the eyespot resistance of VPM 1 was also determined by chromosome 7D. Among F3families from a cross between VPM 1 and a line lacking this eyespot resistance and the α-amylase marker allele, the two characters segregated independently. This finding reduces the value of the allele as a marker for eyespot resistance, but suggests that VPM 1 possesses a large segment of chromosome from the D genome of Ae. ventricosa. © 1984, The Genetical Society of Great Britain.