Cytogenetical studies in wheat: II. An analysis of chlorophyll abnormalities in hexaploid wheat

Abstract

Following segregation in two unrelated wheat crosses, albinism was associated with chromosome 7B nullisomy which permitted expression of mutant genes on chromosomes other than 7B. The frequencies of albino segregante differed in the two instances, being dependent upon the morphology of the 7B monosome, which was either telocentric 7B^Lor normal.Aviridisphenotype also segregated from one cross. Its expression was independent of 7B aneuploidy. Failure to obtain lines segregating only for green andviridisphenotypes was due to semi-lethality resulting from the presence of two 7B isochromosomes.