INHERITANCE OF PHOTOPERIODIC HEADING RESPONSE IN WINTER AND SPRING CULTIVARS OF BREAD WHEAT

1 April 1973

journal article
Published by Canadian Science Publishing in Canadian Journal of Plant Science

Vol. 53 (2) , 247-250
https://doi.org/10.4141/cjps73-046

Abstract

Populations from crosses between two winter wheat (Triticum aestivum L. em. Thell.) parents, Lancer and Warrior, which were sensitive to photoperiod, and Sonora 64, a photoperiod-insensitive spring wheat, were studied under a 10-h photoperiod. F₂ distributions supported by F₃ data demonstrated a two-gene inheritance system with dominant epistasis for insensitivity. The F₂ distributions fit the hypothesis of a 12 early:3 late:1 very late ratio, where early heading in short days was associated with photoperiod insensitivity. Minor factors also appeared to affect the earliness of heading.

Keywords

SPRING
WHEAT
WINTER
EPISTASIS
PHOTOPERIOD
HEADING
LATE
WARRIOR
THELL

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