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Genetic Characterization of Flowering of Diverse Cultivars of Pea

^a Dep. de Ciencias de Recursos Naturales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Univ. Católica de Chile, Casilla 306, Santiago 22, Chile
^b Dep. of Agric., The Univ. of Reading, Earley Gate, P.O. Box 236, Reading RG6 6AT, UK

View larger version (37K): [in a new window]   Fig. 1 Rate of progress from sowing to flowering in response to mean preflowering values of temperature and photoperiod in cultivars of pea from diverse origins. Points represent the means of three replicates grown in a single photothermal environment. Error bars (where visible) indicate difference between observed and estimated values when larger than the marker

View larger version (32K): [in a new window]   Fig. 2 Relations derived from Fig. 1 showing fitted photothermal flowering responses to (a, c, and e) mean preflowering photoperiod at 19°C, and to (b, d, and f) mean preflowering temperature under a 12 h d-1 photoperiod, for seven photoperiod-sensitive cultivars of pea

View larger version (21K): [in a new window]   Fig. 3 Thermal plane responses of rate of progress from sowing to flowering to mean preflowering temperature in seven photoperiod-sensitive cultivars of pea. Responses of reference lines of known flowering genotype derived by Alcalde et al. (1999) have been added for comparison. Points are the means of three replicates

View larger version (18K): [in a new window]   Fig. 4 Rate of progress from sowing to flowering in response to mean preflowering temperature in NZ 6753 (circles) as compared with the responses of reference lines L69 (lfa E Sn hr) and L59 (lf E Sn hr). Points are the means of three replicates