A genetic study of day-length response in wheat

Abstract

Using “alien” chromosome substitution lines of the wheat variety Chinese Spring (CS), it was found that the chromosomes of homoeologous group 2 were important in determining the time to ear-emergence under different day lengths. In terms of their ability to produce plants insensitive to different day lengths, chromosome 2B of CS was the most potent, followed by 2A of CS, 2M of Aegilops comosa, 2CU of Ae. umbellulata, 2D of CS and finally 2Rm of Secale montanum. Dominant epistasis towards insensitivity was observed. © 1978 The Genetical Society of Great Britain.