ANEUPLOID ANALYSIS FOR QUALITATIVE CHARACTERS IN A RECOMBINANT OF WHEAT AND RYE

Abstract

Monosomic analysis was used to locate genes for several qualitative traits in chromosomes of a wheat-rye recombinant, Selection-26 (Sel-26), using the monosomic series of cv. Chinese Spring. The study revealed that the anthocyanin pigmentation in leaf sheath is inherited as a single dominant gene in chromosome 18. The character hairy rachis node is controlled by two nonlinked duplicate genes in chromosomes SA and 7D. The symbols Hm1 and Hm2 are proposed for these two loci. The straight upper part of glume of Sel-26 is due to a single dominant gene in chromosome 68. The gene symbol Gc (glume curvature) is proposed for this character. Three major genes governing hairy glume phenotype have been identified, two for hairiness in chromosomes lA and 2A, and one recessive gene for glabrous glumes in 4A. Modifiers in 68 and 78 are also reported for this character. Aminor recessive gene for red grain colour has been detected in chromosome 4A of Sel-26, presumably contributed by the rye parent and a modifier in SA. Using the phenol test, the tryosinase producinggene has beenmapped in chromosome 68 for glume character and in 48 for rachis.