VERNALIZATION AND PHOTOPERIOD RESPONSE CHARACTERISTICS OF A RECIPROCAL SUBSTITUTION SERIES OF RESCUE AND CADET HARD RED SPRING WHEAT

Abstract

A reciprocal substitution series between Rescue and Cadet hard red spring wheats was used to identify chromosomal differences for vernalization response, basic vegetative phase, and photoperiod sensitivity. A greenhouse technique was used to provide estimates of these variables. Genes affecting vernalization were found on chromosomes 2A, 5A and 5B. Chromosomes 2A and 5B also affected the length of the basic vegetative phase. A gene on chromosome 3B affected photoperiod sensitivity.Key words: Day length, Triticum aestivum L., basic vegetative phase