Fig. 5
From: Genetic basis of the very short life cycle of ‘Apogee’ wheat
An updated genetic model for the wheat flowering pathway. Thin arrows indicate promotion. When grown under warm temperature and long day condition, the Apogee x Overland F2 population are segregated to into different genotypes; the plants that carry dominant vrn-A1a allele will behave as spring type and flower first (flowering signals transited in the pathway indicted in blue), the plants that carry dominant Vrn-B1 allele will behave as spring type and flower later (flowering signals transited in the pathway indicated in red), because Vrn-B1 has less power than vrn-A1a, and Vrn-B1 is promoted by vrn-A1a in a positive feedback loop; the plants that carry recessive alleles for both vrn-A1b and vrn-B1 will behave as winter type and will not flower unless vernalization is provided or flower with plant age. PPD-D1b and vrn-D3a will accelerate flowering in the spring plants that have been induced to flower by vrn-A1a/Vrn-B1 or the winter plants that have been vernalized