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Heat Stress during Flowering in Summer Brassica

Agric. and Agri-Food Canada, Eastern Cereal and Oilseed Res. Ctr., Central Exp. Farm, K.W. Neatby Bldg, Ottawa, ON, Canada K1A 0C6

View larger version (15K): [in a new window]   Fig. 1. Mean standard error of estimate (SEE g m-2) of the model predicted yield with varying threshold temperatures (TF) compared to the observed yield.

View larger version (33K): [in a new window]   Fig. 2. Relationship between heat stress during flowering and (a) number of flowers on the main racemes; (b) number of pods on the main racemes; (c) success ratio (%, ratio of pods produced per flowers produced). The LSD error bar represents differences among year by date samples and r = linear correlation coefficient (n - 2df).

View larger version (31K): [in a new window]   Fig. 3. Relationship between heat stress during flowering and (a) number of seeds on the main racemes; (b) seed weight per 1000 seeds (g); (c) number of seeds per pod on the main racemes. The LSD error bar represents differences among year by date samples and r = linear correlation coefficient (n - 2df).

View larger version (33K): [in a new window]   Fig. 4. Relationship between heat stress during flowering and (a) main raceme yield as a proportion of total yield (b)main racemes seed yield (g) per flower; (c) seed yield g m-2. The LSD error bar represents differences among year by date samples and r = linear correlation coefficient (n - 2df).